CA2697023C

CA2697023C - An elastic composite, and a system and method for making the elastic composite

Info

Publication number: CA2697023C
Application number: CA2697023A
Authority: CA
Inventors: Anne Smid; Patrick King Yu Tsang; Andrew C. Wright; William S. Sayers; Kuo-Shu Edward Chang (Deceased)
Original assignee: DSG Technology Holdings Ltd Virgin Islands
Current assignee: DSG Technology Holdings Ltd Virgin Islands
Priority date: 2007-08-22
Filing date: 2007-08-22
Publication date: 2014-07-08
Anticipated expiration: 2027-08-22
Also published as: WO2009025643A1; CA2697023A1; MX337926B; MX2010002055A

Abstract

In one aspect, a method of making an elastic composite for incorporation into a disposable absorbent garment, textile or fabric structure, and the like is provided. The method comprises the steps of: conveying a first web of material along a first web plane moving path; conveying a second web of material along a second web plane moving path generally parallel with the first web plane moving direction; and applying a section of a continuous strand of elastic element onto both the first web and the second web along a direction generally transverse to the web plane moving paths.

Description

AN ELASTIC COMPOSITE, AND A SYSTEM AND METHOD FOR MAKING THE
ELASTIC COMPOSITE
BACKGROUND OF THE INVENTION
[00011 The present invention relates generally to elastic composites. More particularly, the present invention relates to an elastic composite that can be employed in one or more areas of a garment, other textile or fabric structures, similar material structures, and the like. The present invention also relates to a system and method of making the elastic composite and a garment, other textile or fabric structures, and the like, employing the elastic component. The elastic composite and the system and method for making the elastic composite are particularly suited for use with or on disposable absorbent garments or articles such as baby diapers and training pants. To illustrate the invention, exemplary and preferred embodiments described in the context of disposable absorbent garments.
[00021 Pending United States patent application publications US2005/0131373A1 and US/2005/0139311A1 provide background information on elastic composites (and the manufacture of such composites) of the type relevant to the present invention.
Accordingly, some portions of the publications have been included herein to facilitate description of the invention.
Additionally; these publications provide samples of Processes for which the present invention provides improvements, particularly those intended to increase efficiency, productivity, and/or accuracy, among other things.
[00031 Disposable absorbent garments contemplated by the invention include' disposable diapers, disposable pull-on garments, and the like. The principal elements of a typical disposable absorbent garment include a liquid permeable inner layer (or topsheet), a liquid imp.ermeablc outer layer (or backsheet), and an absorbent core sandwiched between the - inner and *outer layers. Elastic members may be incorporated into different parts of the garment. For example, elastic members may be positioned longitudinally along a diaper, generally outboard of the absorbent core to effect a seal around the buttocks, legs, or both of .2 the users. In addition, several elastic members (e.g., in the form of elongated elastic threads or strands) may be positioned laterally throughout the waist regions (including the side waist regions) of a disposable absorbent garment. The resulting elastication allows the garment to stretch when it is put on and then during wear. In this way, the garment can stretch to accommodate variations in waist size and leg size of the user, while fitting snugly about the waist and legs.
[0004] When elastic members are= incorporated into a part or area of the garment, that part or area typically becomes a distinct, functional Component of the garment. These elastic components include the side panels or ear portions, the waistband, and fastening tabs. The elastic components to which the present invention is directed is generally elongated, and may be a distinct portion of a larger, unitary piece, or a separate, attachable component.
Furthermore, the elastic component typically contains one or more sections or layers in addition to the elastic members. In this regard, such an elastic component may be referred to as an elastic composite.
[0005] These elastic composites are typically functional components that have an = important impacton the fit and sealability of the garment. Due in part to its multi-component construction, these elastic composites typically require a dedicated sub-process for manufacture which must be accommodated by the larger garment manufacturing process.
Alternatively, the elastic composite may be manufactured independently and fed into the larger process as a complete product. The design and construction of the' elastic composite represents, therefore, a significant portion of the cost of manufacturing a disposable absorbent garment, as well as the quality and utility of the finished product.
100061 It is; therefore, desirable to provide a functionally and/or an aesthetically improved= elastic composite, and an improved system and method of making the elastic composite. Furthermore, such an elastic composite, method, and/or system is desired that can . Provide improvements in productivity, efficiency, accuracy, and/or cost.
For example, cost benefits (among other benefits) may be derived from such a system and/or method that increases the speed and output of elastic composites, or minimizes the space and/or component required for making the elastic composite (as compared to prior art systems and methods). Increases in speed or output may be achieved by increasing the speed or rate of one or more subprocesses, e.g., conveying, folding, feeding, or elastic applying processes of the larger manufacturing process.

SUMMARY OF THE INVENTION
[0007] For purposes of the present description, the term "elastic band" or "elastic composite" refers to a multi-layer construction. In this construction, a plurality of elastic -members, such as threads or strands, are disposed adjacent one or more layers, e.g., backsheet and topsheet. In this way, the elastic members impart elasticity to the adjacent layers and thus, to that part of the garment or other textile structure. Such an elastic structure may be a.
distinct attachable component of the garment or textile structure or may be a distinct portion or section of the garment body or textile structure or a larger, unitary component of the = garment body or textile structure. =
[0008] In one aspect, a method of making an elastic composite for incorporation into a disposable absorbent garment, textile or fabric structure, and the like is provided. The method comprises the steps of: conveying a first web of material along a first web plane moving path; conveying a second web of material along a second web plane moving path generally =parallel with the first web plane moving direction; and applying a section of a continuous strand of elastic element onto both the first web and the second web along a direction generally transverse to the web plane moving paths.
[0009] In another aspect, another method of making an elastic composite is provided.
The method comprises the steps of: conveying a first web, whereby the first web moves along a predefined path; applying a first section of a first elastic strand onto the first web and generally transversely to the moving web; applying a second section of a second elastic strand onto the first web and generally transversely to the moving web;
andrepeating the applying steps while performing the conveying step, thereby arranging a plurality of first and second elastic elements on the first web, in generally parallel relation to one another.
100101 The present application is also directed to systems-of making an elastic composite, suitable for employment with the above-described methods.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a plan view of a disposable absorbent garment in the unfolded configuration; FIG. 2 is a plan view of an elastic composite;
[0012] FIG. 3 is a plan view of the elastic composite of FIG. 2 shown in an extended, stretchable condition;

100131 FIG. 4 is a perspective view of the elastic composite of FIG. 2 with a cut-out detail to show an elastic construction;
[0014] FIG. 5 is a simplified schematic of a system for manufacturing the elastic composite according to the present invention;
[0015] FIG. 6 is a top view of an elastic element applicator assembly for use with the =
system of FIG. 5;
[0016] FIG. 7 is a side view of the assembly of FIG. 6;
[0017] FIG. 8 is a simplified process illustration of making the elastic composite according to the invention; =
100181 FIG. 9 is a plan view of an alternative elastic composite according to the present invention;
[0019] FIG. 10 is a top view of an alternative elastic element applicator assembly for use with the system of FIG. 5, according to the invention; =
[0020] FIG. 11 is a simplified illustration of a folding guide assembly for use with the system and method according to the invention;
[0021] FIG. 12A is a perspective view of an elastic composite used for reference;
[0022] FIG. 12B is a perspective view of an elastic composite, according to one embodiment of the present invention;
[0023] FIG. 13A is a perspective view of another elastic composite used for reference; =
[0024] FIG..13B is a perspective view of an alternative elastic composite, according to another embodiment of the present invention;
[0025] FIG. 14A is a top view of a system for making an elastic composite, according to an embodiment of the present invention; =
=
[0026] FIG. 14B is.a side view of the system in FIG. 14A;
[0027] FIG. 15A is a top view of a system for.making an elastic composite, according to an alternative embodiment of the invention;
[0028] FIG. 15B is a side view of the system in FIG. 15X;
= [0029] FIG. 16A is a cross-sectional view through line AA in FIG. 14B;
[0030] FIG. 16B is a cross-sectional view through line BB in FIG: 14B;
[0031] FIG. 16C is a cross-sectional view through line CC in FIG. 19B;

[0032] FIG. 16D is a cross-sectional view through a web output of elastic composite, according to the present invention;
[0033] FIG. 17 is a simplified flow chart illustrating basics steps of a method of making an elastic composite, according to the present invention;
=
5 [0034] FIG. 18 is a top view of a system for making an elastic composite, according to an embodiment of the present invention;
[0035] FIG. 19 is a perspective view of the system in FIG. 18;
[0036] FIG. 20A is a cross-sectional view through line AA in FIG. 18;
[0037] FIG. =20B is a cross-sectional view through line BB in FIG. 18;
[0038] FIG. 20C is a cross-sectional view through line CC in FIG. 18;
= [0039] FIG. 21 is a cross-sectional view of a web output of elastic composite, according to the present invention;
[0040] FIG. 22 is a simplified flow chart illustrating basic steps of a method of making an elastic composite, according to the present invention;
[0041] FIG. 23A is a perspective view of an elastic composite having dual elasticized regions; =
[0042] FIG. 23B is a perspective view of another elastic composite having dual elasticized regions;
[0043] FIG. 23C is a perspective view of an elastic composite having dual elasticized = regions, according to another embodiment of the present invention; =
= [0044] FIG. 24A is a simplified .illustration and front view of an alternative elastic = element applicator in the form of a spinhead, according to the present invention;
[0045] FIG. 24B is a simplified illustration and top view of a web substrate conveyed in a method of making an alternative elastic composite, according to the present invention;
[0046] FIG. 25A is a simplified illustration and front view of an alternative elastic element applicator in the form of a spinhead, according to the present invention;
[0047] FIG. 25B is a simplified illustration and top view of a web substrate conveyed in a method of making an alternative elastia composite, according to the present invention:
DETAILED DESCRIPTION OF THE INVENTION
[0048] In FIG. 1, a disposable absorbent garment 110 is shown that is suitable for the invention and in the form of a diaper having one or more elastic composites incorporated therein. The elastic composite in FIGS. 1-4 and FIG. 9 have side and end edges and, thus, may be referred to herein as elastic composite bands. FIG. 5 illustrates a system and process of making the elastic. composite (and a garment having the plastic composite) in accordance with a previously described concept.
[0049] FIGS. 12-15 and 24-25 are now provided to illustrate another method(s) or = process(es) of making an elastic composite (and a garment having the elastic composite), and a system for making or manufacturing the elastic composite, in accordance with the present invention. These figures also embody various aspects of the present invention in the form a novel elastic composite, a web output of the =elastic composite, and/or a material structure, such as a disposable absorbent garment, textile or fabric structure, similar material structures, =
and the like, and into which the elastic composite is incorporated. The described system and process are particularly focused on the application or integration of the elastic elements upon or with one of the layers of the composite.
[0050] FIGS. 16-23 are also provided to illustrate yet another method(s) or process(es) of making an elastic composite (and a garment having the elastic composite), and a system for making or manufacturing the elastic composite, in accordance with an alternative embodiment of the present invention. These 'figures also embody various aspects of the present invention in the form a novel elastic composite, a web output of the elastic composite, and/or a material structure, such as a disposable absorbent garment, textile Or fabric' structure, and he like, into which the elastic composite is incorporated. The described system and process are particularly focused on the application or integration of the elastic = elements upon or with one of the layers of the composite.
= [0051] As described previously, various aspects of the present invention are particularly suited to or for a disposable absorbent garment, such as baby diapers and training =
pants. To illustrate the invention and preferred embodiments of the invention, much of the following Detail Description will be provided in the context of such disposable absorbent garments. It is contemplated that various aspects of the inventive composite, garment, system, and process may be applicable to other material structures and processes.. This Detailed Description and exemplary embodiment should not, therefore, be construed as limiting the invention to the structures, configurations, methods, and processes described herein.

[0052] The disposable absorbent garment 110 in FIG. 1 is of a type that can be placed against or in proximity to the body of a wearer so as to absorb and to contain various bodily exudates. It should be noted, however, that the present invention is applicable to a variety of disposable absorbent articles and garments, including training pants and a variety of adult incontinence products. As will be described below, the inventive elastic composite or elastic composite band may provide a side panel or ear portion, a waistband; a fastening tab or band, .
or other distinct elastic component of the garment or article. The inventive elastic 'composite may also be incorporated into an ear portion to elasticate the ear portion or to supplement the =
ear portion with an elasticated fasteninglab. Accordingly, the present invention is not =
intended to be limited to the structures and the processes specifically described and illustrated herein. For purposes of description, however,.the following discussion will be directed to an exemplary disposable diaper only. Moreover, the invention will be described in the context of its various configurations and aspects. It should be appreciated that alternative arrangements of the inventive disposable absorbent garment and such an elastic composite band may comprise various combinations, which include one or more of the various configurations and aspects of the invention.
[0053] FIG. 1 is introduced to illustrate some basic features of a disposable diaper 110, most of which are also applicable to other disposable absorbent garments contemplated by the invention. The diaper 110 includes three main regions aligned along an imaginary longitudinal axis or plane AA. These regions include a first waist region 112 (typically at the front of the user when the garment 110 is worn), a back waist region 114, and a crotch region 116. The diaper 110 is also characterized by a front edge 140, a back longitudinal edge 142, a first lateral or side edge or side margin 144, and a second lateral or side edge or side margin 146.
[0054] Along a lateral direction, the diaper 110 includes ear regions or ear portions 118 extending laterally from the waist regions 112, 114. Together, the waist regions 112, 114 and crotch region 116 may bereferred to as forming a central body portion 120 of the garment 110 that is positioned within side edges 144, 146. The body portion 120 may also be referred to as being formed by a liquid permeable inner layer .or topsheet 152, a liquid impermeable outer layer or backsheet (not shown), and an absorbent core 154 sandwiched =
= between the two layers. The ear portions 118 further include fastening tabs 124 for attaching the waist regions 112, 114 together. The diaper 110 also has an elastic waistband 130 positioned generally along the back edge 142 to facilitate fastening and to enhance the fit and seal of the diaper 110. When the hourglass shaped diaper 110 is worn, the crotch region 116 fits about the crotch of the wearer, and the front and back waist regions, 112 and 114, fit about the corresponding waist areas. The ear portions 118, on the other hand, wrap about the . 5 wearer and the fastening tabs 124 engage to form a complete, all-around waistline of the diaper 110.
[00551 FIG. 2 depicts a typical elastic composite band 210. More particularly, the =
elastic composite band 210 is one particularly suited for use as a side panel or fastening tab of a disposable absorbent garment (see, e.g., Fig. 1). FIG. 4 provides a perspective view and partial cut-out of the elastic composite band 210. The elastic composite band 210 may be = characterized by an imaginary centerline LL. In one aspect of the invention, the centerline LL preferably corresponds with the machine direction of the elastic composite band 210 during manufacture. The elastic 14tid 210 also has side or longitudinally extending side edges 210a and 210b and laterally extending end edges 210c and 210d. In FIG.
1, the elastic composite band 210 is shown in the stretched state as, for example, when a garment incorporating the elastic composite band 210 is worn. In this state, the elastic composite band 210 stretches, in the lateral or cross-machine direction (denoted by arrows XX).
[00561 As used herein,-the term "machine" direction refers to the direction at which the component, or more particularly, the material web from which the elastic composite is derived (e.g., cut from) is driven in an assembly line during manufacturing.
The term "cross-directional machine direction" or "cross-directional," on the other hand, refers to the direction that is perpendicular to the machine direction. With reference to the elastic composite 20 of .FIG. 2, the cross machine direction is the direction XX extending laterally or perpendicularly =
relative to the longitudinal line LL. =
[0057] The elastic composite band 210 has a central region 214 in which an elastic . construction is situated. Extending laterally from this central elastic or elasticized region 214 are regions 216 and 21.8, which are substantially non-elasticized. As shown in FIG. 2, the regions 216, 218 occupy the expanse between the central .elastic region 214 and the side edges 210a, 210b. Now with reference to FIG. 4, the elastiC composite band 210 has a top layer 318 and a bottom or base layer 320. The two layers 318, 320 preferably extend the total width and length of the elastic composite band 210, thereby providing the side edges 210a, .
210b, and the end edges 210c, 210d.. Both the base layer 320 and the top layer 318 are preferably non-woven, breathable, disposable materials such as propylene, non-woven fabric, breathable polyethylene/polypropylene films, or non-porous films (or combinations of these materials): The base layer 320 and top layer 318 adhere to one another, thereby sandwiching and securing a plurality of elastic strands 322 therebetween.
[0058] The elastic strands 322 may be substituted, in alternative .embodiments, by suitable elastic elements such as elastic strands, threads, ribbons, and elastic glue beads. In one aspect of the invention, the elastic elements or strands 322 are distributed along a direction that extend between the side edges 210a, 210b and parallel with (or corresponding to) center line LL. Further, each elastic element 322 is generally aligned or oriented in a direction corresponding with the lateral or cross-machine direction, i.e., in a direction = generally perpendicular to the longitudinal center line LL and intersecting the side edges 210a, 210b. Preferably, the strands 322 are disposed in generally parallel relation and spaced= =
apart generally equally along the longitudinal direction. More preferably,=
the elastic strands 322 are of generally equal length. Accordingly, when the elastic composite band 210 is worn, the strands 322 impart elasticity. into the structure which alloWs the band 210 to stretch in the lateral or cross-machine direction XX.
[0059] The elastic strands 322 are preferably tensioned during securement between the top and base layers 318, 320. FIG. 3 illustrates the elastic composite band 210 in a laterally stretched condition. In this condition, the central elastic region 214 has a width that is almost equal to the non-elasticized zones 216 and 218. When returned to the non-laterally stretched or relaxed condition, as shown in FIG. 2, the central elastic region 214 contracts and = crimps to a substantially reduced width. In this condition or state, the contracted elastic strands 322 shirrs the elastic composite 210 and provide pleats 234 in the contracted elastic region 214.
= [0060] Returning to FIG. 1, the disposable absorbent garment 110 employs one or more elastic composite bands. The disposable absorbent garment 110 employs in each of the =
ear portions 118, a fastening tab 124 having the elastic composite construction. As the =
fastening tab 124, the elastic composite band is configured such that one non-elasticized region 124a is attached to and overlaps the central body 120 of the garment 110 while a secong non-elasticized region 124b is situated outboard of the side margins 144, 146. An elasticized region 124c, as shown in FIG. 1, provides elasticity, and thus, stretch in the lateral or cross-machine direction (of the elastic composite). In respect to the rest of the garment 110, the elasticity or stretch provided by the central elastic region 124c directed along a direction that is generally perpendicular to the longitudinal center line AA
of the garment 110, and corresponds with a direction that wraps about the waistline of the user.
[0061] The disposable absorbent garment 110 in FIG. 1 also provides an elastic 5 composite, as the waistband 130. The waistband 130 is situated centrally in the waist region 114. Further, the elastic composite waistband 130 is disposed such that non-elasticized regions 130a, 130b are positioned outwardly of the longitudinal line AA of the garment 110, while an elasticized region 130c i positioned centrally across the longitudinal center line AA. Moreover, the elasticized region 130c is configured such that the elastic strands are , 10 aligned or.oriented in a direction that is generally perpendicular to the longitudinal center line AA. In this way, the elastic composite waistband 130 imparts elasticity about the waist region 114 of the garment 110, and in a direction corresponding with the direction of waistline about the user.
. [0062] FIG. 9 depicts an alternative elastic composite band. The elastic composite band 710 illustrated therein differs from the previously described elastic composite band (see e.g. FIGS. 2 and 2a) in that the elastic composite band 710 includes two elasticized regions 714a and 714b. The elasticized region 714a, 714b are preferably equidistantly spaced apart on either side of the longitudinal centerline AA. The spacing of the elasticized regions 714a, 714b creates right and left non-elasticized or dead regions 716, 718, as well as central non-elasticized region 750. The elasticized regions 714a, 714b imparts elasticity to elastic composite band 710a in the lateral directions XX, and in the central non-elasticized region 750, also in the opposite lateral direction VV.
[0063] FIGS. 5-8 and 10-11 depict a system and system components, and illustrate a method or process of making or manufacturing-the elastic composite. Two elastic composite web outputs 1031 are produced from four separate non-woven web inputs 1003a, 1003b, 1003c, and 1003d. To facilitate the description, reference may be made to U.S.
Patent Nos.
3,627,621 and 2,902,395, each of which discloses certain features of the prior art system and process for manufacturing a lamination and/or composite having non-woven materials.
In particular, reference may be made to certain basic components of a system or apparatus for manipulating non-woven materials and fibers.

[00641 Referring first to FIG. 5, a system 1001, includes four separate non-woven web inputs 1003a-1003d, which provide a web or roll of non-woven material for the elastic composite. The system further includes an output assembly or reel 1005 that receives twb elastic composite webs 1031 from the rest of the process. These two separate elastic webs may be fixed together to produce the kind of composite described in respect to FIG. 4 (or maintained separately). =
[00651 Central to the system 1001 are a conveyor assembly 1009 for receiving, manipulating, and conveying each of the non-woven web inputs. The conveyor assembly =
1009 is positioned and operatively associated with an elastic element applicator such as a .10 spinning head assembly 1007, that applies elastic fibers or strands upon, onto, and or integrally with the non-woven -Web inputs. The spinning head assembly 1007 further includes a spin head 1017, preferably in the form of a spinning bracket, or cylinder 1017 and the like.
The spin cylinder 1017 is configured to hold an "end section" of the continuous strand WW
of elastic and move it about a generally vertical plane XX in a reciprocal or repetitive pattern (relative to the conveyor assembly 1009). This plane XX is defined by the area within the spinning perimeter of the cylinder 1017 and which is traced by the outer most bracket or eye 1017b securing the strand of elastic WW to the spin cylinder 1017. The paths of the spinning . head 1017 and the section of elastic strand retained thereby are provided on the plane XX.
[0066]=As shown in the schematic of FIG. 5, nonwoven inputs 1003a and 1003b are fed, utilizing a series of rollers, into the conveyor assembly 1009. Before the two nonwoven webs are fed into the conveyor assembly 1009, the webs are directed through the folding -guides or plates 1039. The folding guides 1039 serve to effectively reduce the overall width of the nonwoven web by folding the lateral or side edges along a pre-determined, longitudinally-extending side fold line YY. = The first folding guide 1039a initiates the first 90 turn while the second folding guide 1039b initiates a second 90 turn. The roller 1039 disposed in between the guide 1039a, 1039b facilitates the folding process.
The two folding guides 1039 and roller 1369 may be referred together as a folding guide assembly.
[0067] FIG. 11 illustrates yet another typical folding guide assembly. The folding assembly 1639 includes folding plates 1639a and a roller 1669 upstream of the folding plates 1639. *A web 1603 is passed around the narrow roller 1669, whereby the width of roller 1669 helps determine the width of the web 1603 between the folded flaps VV (i.e., the width of exposed outward surface 1689 defined between the fold lines YY). The width of the roller 1669 is substantially less than the width of the nonwoven web 1603. As a result, the edges of the nonwoven web 1603 list and curl up around the sides of the roller 1669, thereby initiating the folding process. The flat plates 1639a then helps to complete the fold and hold the folded sides down. Another folding guide (not shown) may be.provided in a position upstream of the folding roller 1669 to help guide or initiate the.folding process.
[0068] For purposed of the present Description, the inward surface 1679 is the surface or side of the web 1603 toward which the folded flaps VV are turned. The exposedoutward surface 1689 is the surface opposite of the inward surface =1679.
[0069] The conveyor assembly 1009 is set up so as to guide these two nonwoven webs 1003a and 1003b through the center of the assembly 1009 towards and eventually inside the elastic spin Cylinder 1007 (into the spinning path). Once inside the spin cylinder 1017 the conveyor assembly 1009=delivers the nonwoven webs to each outside, upper and =
lower faces (outward faces) of the conveyor assembly 1009. At this point the direction of travel of the nonwoven webs are reversed and the webs are directed out of the spin cylinder 1007. As the nonwoven webs exit the spin cylinder 1017, an elastic strand WW
is wrapped around the entire conveyor assembly 1009, and as it contacts the upper and lower face of the web platforms it comes into contact with:the nonwoven web. As shown in several of the Figures, the elastic strand WW is applied crosswise or laterally on the web, and transverse to the direction of the moving web. The friction between the tensioned=elastic strand and the nonwoven webs on the upper and lower faces of the conveyor assembly draws=the "wrapped"
elastic strand out of the spin cylinder 1017 and towards contact with two further nonwoven webs 1003c and 1003d.
[00701 The nonwoven webs 1003c and 1003d are operatively positioned upstream of an adhesive applicator 1013. Utilizing a system of rollers in conjunction therewith, the non-.25 woven inputs 1003c, 1003d and adhesive applicators 1013 apply a web of pre-glued non-woven material onto the conveyor assembly 1009 and onto the elastic strand "wrapped" ' around the nonwoven webs 1003a and I003b. =
[0071] Furthermore, the system 1001 employs a standard elastic input source 1011, e.g., a bobbin of elastic yarn, that feeds elastic strands or fiberS WW onto a tensioning/speed controlling unit 1037 and then to the spin cylinder or the spinning head 1017, so as to apply the strands WW onto the conveyor assembly 1009 and the non-woven material webs conveyed therethrough. Elastic is taken off the bobbin, box or positive drive system and fed through a tension and speed controlling motor towards the spin cylinder 1017.
The elastic WW is delivered through a hollow shaft in the motor controlling the spin cylinder 1017. The elastic WW then passes into the spin cylinder 1017 and is guided by rollers, eyes= or any other suitable Mechanism around the inside face of the spin cylinder 1017.
[0072] FIGS. 6 and 7 provide alternate views of the spinning head assembly 1007 and conveyor assembly 1009. As discussed above, the conveyor assembly 1009 receives four separate webs of non-woven materials and outputs two webs 1031 of elastic composite.
FIGS. 8 and 9 are provided to further illustrate the process= of making the elastic composite.
These figures, more particularly FIG. 8, illustrates the paths taken by the non-woven web materials to and from the conveyor assembly 1009.
[0073] Referring to FIG. 8, reference letters A-G are used to refer to stages in the process and in conjunction with the description of the process. As discussed above,.non-woven raw material webs are fed into the process at stage A. These webs provide four separate non-woven web inputs into the process. Non-woven webs 1 and 3 are combined to make an elastic composite output 1 (i.e., referred to in the Figures as the WRAP output).
Non-wovens 2 and 4, which are both on the downside of the spinning head assembly 1007 and conveyor assembly 1009, combine to make a second elastic composite output 2 (Le., WRAP
= [0074] At stage B, non-woven webs 1 and 2 are folded prior to being directed to the conveyor assembly 1009. A predetermined width of non-woven is folded= over each side of the web to make two folded flaps VV. The width of the flap VV determines the width of the dead zone or non-elasticized region described previously, while the width of the non-woven, after folding, determines the width of the elasticized region. At stage C, the non-woven webs 1 and 2 are fed into the conveyor assembly 1009, in particular into the middle or inside of the conveyor assembly 1009 with the folded side of each web facing the outside of or away from the conveyor assembly .1009. It should be noted that at this stage C, non-woven webs 1 and 2 are not bonded together. The conveyor 1009 then feeds the non-woven webs 1 and 2 towards the spinning head assembly 1007. At stage D, the non-woven webs 1 and 2 have traveled =
almost the length of the conveYor assembly 1009 and progresses into the spinning path of spinning head assembly 1007 and intersecting the "spinning" vertical plane XX
of the elastic strand WW. Further, at the end of the conveyor assembly 1005, the webs 1 and 2 are directed away from each other and onto the outside of the conveyor 1009 and away from the spinning head 1007. Non-woven web 1 turns up on the upper side of the conveyor assembly 1009, while non-woven web 2 travels along the lower side of the conveyor.assembly 1009. At stage E, an elastic strand WW is wound around the folded non-woven webs 1 and 2, as these webs pass through the spinning head and the vertical plane XX. The elastic strand WW is applied to the moving webs 1 and 2 cross-directionally to the direction of the moving web.
The movements of the webs 1 and 2 away from within the spin cylinder 1017 draws the "wrapped" elastic strand out of the spin cylinder 1017.
[0075] Now turning to non-woven webs 3 and 4, these webs are provided to the conveyor assembly 1009 with adhesive applied on one side (i.e., applied by the adhesive applicator 1013). At stage F, the non-woven webs 3 and 4 are brought into contact with webs 1 and 2, respectively, and the elastic strands WW. As a result, the webs 1 and 3 sandwich elastic strands WW on the upper side of the conveyor assembly 1009, and non-woven webs 2 and 4 sandwich elastic strands WW on the under side of the conveyor assembly 1009. The elastic strands WW run between the two non-woven elastic non-woven composite (cross-= direction), but is then cut by a knife (see knife 1410 in FIG. 9, as described below), :thereby separating the. twowrapped composites. At stage G, the composites 1 and 2 are fed away from the conveyor assembly 1009 and the folded flaps on webs 1 and 2 become unfolded, with guiding, to form a flat non-woven cOmposite. Subsequently, the composites are guided from the spinning head assembly 1007 and conveyor assembly 1009 and into further processes. As shown in FIG. 5, the elasticbutput webs arrives via a system of rollers onto an =
elastic composite =output reel 1005.
[0076] As shown in FIG. 6, the conveyor assembly 1009 preferably includes two web moving platforms 1412 which are juxtapositioned so as to provide an interface therebetvveen.
Each web moving platform 1412 includes a continuous belt 1.414 supported about a plurality of rollers 1416 so as to be capable of reciprocal motion. The two web moving platforms 1412 are generally the same length and juxtapositioned sO as to accommodate the non-woven webs 1 and 2 therealong from one end to the other end. Preferably, a roller 1416 is situated about midway between the ends of the web moving platform so as to deliver the non-woven webs 3 and 4 respectively to the web moving platform. =
[0077] As shown in FIGS. 5, the spinning head assembly 1007 is positioned about and in the vicinity of one end of the conveyor assembly 1009. =In operation, the spinning head 1017 spins about the vertical plane XX which intersects the ends of the web moving 15 =
platforms 1412 so as. to deliver the elastic strands WW around and about both web moving platforms 1412. In operation, the first and second non-woven move along the outside or exposed.surfaces or sides of the web moving platforms 1412 and receives the elastic strands = WW delivered by the spinning head 1017. By way of its movement away from the spinning head 1017, the moving web draws the continuous elastic strand WW from the spinning head 1017.
= = [0078] By pre-folding the two non-woven webs that are fed to the inside of the = conveyor assembly 1009,. it is possible to create an elastic composite with cross directional stretch having non-elasticized regions ("dead zones") along each edge. The width of the central elasticized region is fixed to the width of the conveyor platform 1412. The width of the non-elasticized regions or dead zones is determined by the width of the fold VV. The fold VV in the non-woven is preserved by the conveyor assembly 1009 =during application of the elastic element and is applied in such a way that the folded edge of the non-woven is not in contact with the elastic element WW. The fold VV is then allowed to open after the composite exits the conveyor assembly 1009 to provide a flat elastic composite with non-elasticized regions. By altering the alignment of the materials as it enters the conveyor assembly 1009 or by changing the widths of the materials used it is possible to create vadous composite designs.
[0079] The above-described process provides an elastic composite=with cross directional stretch properties. The process also provides non-elasticized regions on either latitudinal side of the central elasticized zone of the composite. For the purposes of the description the term "non-woven" is used to describe the principal material used in the construction of the elastic composite. However, it should be noted that this invention is'not limited to non-woven materials but may be applied to any material that is available in the form of a. continuous sheet. Other materials suitable for this application include PE film, PE
= film/non-woven laminates and tissue.
[0080] FIG. 10 illustrates an alternative conveyor assembly 1509 and an alternative elastic element applicator in the form of a spinning head assembly 1507. As will be =
understood by one skilled in the art, the spinning head assembly 1507 is operated to convey .
or transmit elastic strands onto a web moving platforin 1512 of the conveyor assembly 1509.
= As before, the conveyor assembly 1509 preferably employs two web moving platforms 1512, =

- which are juxtapositioned so as to provide an interface therebetween. The conveyor assembly 1509 is similar to that illustrated in FIGS. 5 .and 6.
00811 On the other hand, the conveyor assembly 1509 is operated differently in that more than one elastic strand WW is applied onto and about the web moving platforms 1512 = at one time. The spinning head assembly 1507 includes a spinning head in the form of a spin =
bracket 1517 having a plurality of arms 1517a. The spin bracket 1517 receives elastic strands 1553 from a shaft 1551a of a motor 1551. The motor 1551 feeds the two lines of elastic strands 1553 to the spin bracket 1517, and the two feeds of elastic strands 1553 are guided together through the spinning head assembly 1517 (where the two lines twist together). As shown in FIG. 10, the two strands 1533 are moved about a y vertical plane then delivered, together, onto a nonwoven web 1544 moving horizontally on the web moving platform 1512.
Preferably, both lines of elastic strand 1553 are fed onto the same arm 1517a of the spinning bracket assembly 1517 (rather than on opposite sides). In this way, the separate feeds or lines of elastic strands 1553 are prevented from twisting, together and possibly breaking.
100821 By applying two lines (or more) of elastic strands onto the moving nonwoven web, the speed of the manufacturing process is increased. Specifically, the speed at which the composite is manufactured may be increased by up to 100%, without increasing the speed at which the spinning head assembly is spinning and without changing the overall number of elastic strands in the final composite. Table 1 below provides two examples of the result of a process of applying the elastic strands WW onto a nonwoven web. The spinning head assembly 1507 operates at the sarne rotational= speed in both processes.
However, the pitch (i.e., the separation between elastic strands WW) is doubled for the alternative process (wherein a pair of elastic strands are applied to the nonwoven web). By employing the = alternative process, the total machine output is also doubled (i.e., from 40m/min of composite to 80m/min). In both examples, the overall amount or length of elastic strands WW utilized or applied to the composite is generally the same. Consequently, the final composite =
produced by both subprocesses have the same, or at least, similar tensile characteristics.
Table 1 Spin head Pitch (elastic No of elastic strands fed Total machine output speed = separation) into spin bead (two webs of composite) 8,000 rpm 2.5 mm = 1 40 rn/min =
8,000 rpm 5 mm 2 80 m/rnin =
[0083] It will be apparent to one skilled in the relevant art, upon reading the present description and/or reviewing the accompanying drawings, that the alternative subprocess described above may be modified to feed or apply a different munber of elastic strands onto the nonwoven web. That is, three or more elastic strands may be fed through the spinning head assembly .and applied to the nonwoven web.
[0084] Moreover, it is contemplated that the elastic strands may be separated lnside the spin head and directed independently to opposite sides of the nonwoven web. In such a =
case, it is preferred that the assembly 1507 that includes the elastic bobbins/reel and tensioners and guides the elastic strands into the motor 1551 (or more appropriately, the motor shaft 1551a), is rotated at the same speed and in the same direction as the spin head 1517. In this way, the risk of twisting of the strands together inside the .spin head 1517 is minimized.
=
[0085] FIGS. 12A-14B are provided to illustrate aspects and embodiments of a present invention. In particular, FIGS. 12B and 13B depict alternative elastic composites according to the invention. FIGS. 14A and 14B illustrate an exemplary system that is operable to implement a method of making the elastic composite also according to the invention. The exemplary system may be used with or integrated into the system(s) previously described in respect, for example, to FIG. 5. The invention, and its various aspects and embodiments, shall be'understood in view of FIGS. 12A-14B and/or the =
accompanying descriptions, as well as the previous illustrations and accompanying descriptions.
[0086] These additional Figures are provided for illustration and to facilitate a description the present invention. The present invention shall not, therefore, be limited to the structures and processes specifically described *and illustrated in respect to FIGS. 12A-14B.
FIGS. 1-11, and accompanying descriptions, demonstrate application of a tensioned elastic strand across a moving web of nonwoven sheet. The elastic strand was affixed to the nonwoven sheet so as to provide a composite.having, among other attributes, cross-directional elasticity. In respect to previous illustrations, the elastic strand, or a group of elastic strands, were fed via a single path and then applied to a moving web of nonwoven sheet by operation of a spin head. The elastic strand or group of elastic strands are distributed onto the web at the rate of one strand per single revolution of spinhead.
100871 In a further aspect of the invention, a method is now described whereby multiple strands, e.g., two strands or two separate group of strands, are applied to a moving web of nonwoven sheet. Preferably, the.strands or collection of strands travel by two =
separate paths and are distributed onto the web of nonwoven sheet at the rate of two strands per single revolution of the spinhead. The two strands may be applied simultaneously to.
different portions of a conyeyor assembly conveying one or more webs. This variation of the invention provides advantages in efficiency as the output of the machine is increased by at least 100%. Alternatively; the machine speed may be reduced by as much as 50%, providing a reduction in running costs due to wear and tear and energy consumption. The present inventive method maintains, however, the same output and volume as the single path processes previously described.
100881 The following terms are used to describe certainsystem(s) and process(es) for making an elastic composite. In particular, these terms describe different running configurations.asSociated with this alternative method of manufacturing an elastic composite.
First, the term "single strand, single path method (SSSP)" refers to a method of manufacture whereby one strand of elastic element is delivered to a web of nonwoven sheet at the rate of one strand per single revolution of the spinhead and via a single path Or mode of travel through the spinhead. This method was previously described in respect, for example, to FIG.
13. Second, the term "multiple strands, single path method (MSSP)" refers to a method of manufacture whereby multiple strands of elastic element are grouped together and distributed via a single path or mode of travel through the spinhead. In this method, the elastic strands are distributed on the web of nonwoven sheet at the rate of one collection of strands per revolution of the spinhead. An.example of this method was described in respect to FIG. 15.
= 100891 Furthermore, the term "single strand, dual path method (SSDP)"
refers to a method of manufacture whereby two strands of elastic element enters the spinhead and are distributed onto the web of nonwoven sheet via two separate paths or modes of travel, in accordance with the present invention. In this method, the elastic elements are distributed on the moving web of nonwoven sheet at the rate of two strands per revolution of the spinhead.

The term "multiple strands, dual path method (MSDP)" refers to a method of manufacture whereby two sets of more than one strand are collectively grouped and are distributed on the web via two separate paths or modes of travel through the spinhead. .In this method, the elastic elements are distributed at the rate of two collections of strands per revolution of the spinhead.
[0090] As used hereafter, a substantially long feed of elastic may be referred to as a "continuous strand" even though it is understood that the strand is not infinitely long.
Relative to the dimensions .of the elastic elements arranged on the elastic composite, the elastic strand is, for practical purposes, continuous. For present purposes, the term "continuous", as applied to "strand", shall indicate a length that will not be consumed in less = than a few revolutions of the spinlicad. Moreover, the term "strand" is used to refer to the feed or continuous length of elastic whereas the section or segments applied to the elastic composite may be referred to as "elastic elements." A "section" of elastic is referred to herein as the length (i.e., the end length) outside of, fed by, the arms or eyelets of the spinhead and is spun by the spinhead.
[0091] FIG. 12A reproduces, in an alternative view, the elastic composite 210 =
depicted in FIGS. 2A, 2B, and 3. Although shown in the stretch state, the elastic composite 210 =has a fixed width DD in the lateral direction and apredetermined cut length EE along the longitudinal direction. During the manufacturing process, a continuous web-of the elastic composite 210 is delivered as output, having continuous longitudinally directed side edges 210a, 210b and a central elasticized region 214 in which an elastic construction is situated.
= Extending laterally from the elasticized region 214 are non-elasticized regions 216 and 218 (also referred to herein as "dead zones"). The elastic composite 210 includes a top layer 218, a bottom layer 220, and a plurality of elastic elements 322 sandwiched therebetween. The top and bottom layers 218, 220 provided in most, if not all, of the examples in these descriptions are preferably nonwoven. It is contemplated, however, that other materials may also be used, including a variety of textile materials, fabrics, and the like.
=
[0092] As previously described in detail, the elastic element 322 extends generally along a direction generally perpendicular to the longitudinal or machine direction and are = spaced apart from one another by a generally fixed distance n or pitch. The pitch n is directly related to the manufacturing process settings and may be calculated as follows: =

n (mm) = (speed of conveyor (m/min)) (rotational speed of spinhead (rpm)) [0093] FIG. 12B depicts an exemplary sheet of elastic composite 1710 according to 5 the present the invention. The elastic composite 1710 has been manufactured in accordance with a single strand dual path method. The elastic composite 1710 includes sections and components that are identical to those of the elastic composite 210 in FIG.
17A, with the exception of a central elasticized region 1714: Sandwiched between a top layer 1718 and a bottom layer 1720 are a plurality of spaced-apart, laterally extending elastic elements 1722.
10 In this embodiment, the distribution of elastic elements 1722 is alternately provided by a first elastic element 1722a and a second elastic element 1722b. The first and second elastic . elements 1722a, 1722b differ in that one is fed from a source different from the source of the other. As will be further explained below, the sources are preferably a first continuous elastic strand and a second distinct, continuous, elastic strand. Typically, the two continuous elastic 15 strands are of the same material type and have the same material properties, but may be varied, in further embodiments, to impart specifically targeted elastic properties to the elastic composite 1710. The two elastic strands may also differ in thickness (see e.g., FIG. 29B as described below), as well as or in lieu of varying elasticity. One of the elastic strands may even be a type of activated elastomer (e.g., heat activated). Further, the two elastic strands 20 may have a different color to achieve a specific aesthetic design, for example. Thus, the method according to the present invention provides some flexibility in the functional and aesthetic design of the elastic composite.
[00941 The elasticized region 1714 includes an arrangement consisting of alternating first and second elements 1722a, 1722b that are spaced apart by a generally fixed distance or pitch n'. This pitch n' is reduced from the pitch n in the previous elastic composite 210 (See FIG. 17A), thereby providing for a.greater elastic density across the elasticized region 1714.
As will be further described below, the two elastic elements 1722a, 1722b are distributed onto the web or nonwoven substrate preferably from opposing sides of the spinhead. =For every revolution of the spinhead, two strands of elastic elements 1722a, 1722b are delivered onto the web. Employing an MSDP method, the value of n' may be calculated one half of that obtained by the SSSP method (assn. ming that the speed of the nonwoven conveyor:and spinhead are maintained at the same speed as before):

n' (mm) = (speed of conveyor (m/min)) 2 x (rotational speed of spinhead (rpm)) [0095] In an alternative embodiment, two elastic strands are distributed from the spinhead at locations less than 180 apart (phase separation in one spin revolution), as shown in FIG. 24A, for example. In this way, the pitch between elastic elements may be varied.
FIG. 24B depicts an exemplary web substrate 2960 whereon a plurality of first elastic .
elements 2922a and second elastic elements 2922b are applied on a moving first input web =
Wl. =The distribution of elastic elements provides an alternating sequence of first elastic .
element¨second elastic element ¨ first elastic element on the web substrate 2960. The first and second elastic elements 2922a, 2922b are provided by, and are discrete, severed portions of, different elastic strands. In this example, the first elastic element 2922a has a greater thickness than the second elastic element 2922b. Moreover, the distribution of elastic elements provides for different or alternating pitch between successive elastic elements in the sequence. The elastic elements 2922a, 2922b are alternately separated by a pitch of n1 and a pitch of n2. In this depicted example, the larger pitch n2 is three times greater than the pitch nl. As will be further explained below, this alternating pitch sequence may be achieved by providing a spinhead 2917 such as the spinhead 2917 illustrated in FIG. 24A.
The spinhead 2917 has a pair of eyelets 2917b, 2917b' for distributing a first continuous strand W and a second continuous strand W' respectively. The eyelets 2917b, 2917b; are separated by a distance of 90 (followed by a separation of 2700 in the opposite direction).
In providing eyelets that are not generally diametrically opposed about the spinhead, design provisions are preferably made to provide balance to the spinning spinhead. =
[0096] As comparison, FIG. 25 provides a front view of a spinhead 3017 wherein a pair of strand dispenser eyelets 3017b, 3017b' are diametrically opposed and thus, separated by 180 (spin phase revolution). The eyelets 3017b, 3017b' are therefore equidistantly spaced from each other in either direction. Operaticin of this spinhead 3017 generates a web putput 3060 whereon each successive pair of elastic *elements 3022a, 3022b are ultimately separated by a pitch n, as discussed previously.
[0097] FIG. 13A depicts an elastic composite 210' manufactured in accordance with the method previously described in respect to the system of FIG. 15.
Specifically, the elastic composite 210' is manufactured by an MSSP method. The elastic composite 210' includes sections .and components that are generally identical to those of the elastic composite 210 in FIG. 12A, with the exception of the elasticized region 214'. The elasticized region 214' is composed of discrete groups 322' of multiple elastic elements that extend generally in the .5 . lateral direction. The center of the groups 322' of elastic elements are spaced apart from one another in generally parallel relation by the same fixed distance n (from Fig:
17) (a center-to- =
center distance). In accordance with the method previously described in respect to the system of FIG. 15, a group 322' of elastic strands is delivered to the web upon eaah revolution of the spin head. In the elastic composite 210' depicted in FIG. 13A, the groups 322' consist of two adjacent elastic elements.
[0098] FIG. 13B depicts an exemplary elastic composite 1810 according to a fUrther embodiment of the present invention. The elastic composite is manufactured by an MSDP
method, in accordance with an alternative embodiment of the present invention.
The elastic composite 1810 includes sections and components that are generally identical to those of the three previously described elastic composites 210, 1710 and 210', with the exception of the elasticized region 1814. In this exemplary elastic composite 1810, two different groups of elastic strands 1822a, 1822b are delivered onto the web upon each revolution of the spinhead.
The lateral centerlines of the groups 1822a, 1822b are spaced apart by the smaller pitch n' ¨
as with the elasticized region 1714 in FIG. 12B. Assuming that one type of elastie element is 20= used for the elastic composites in each of FIGS. 12A, 12B, 13A, 13B, the resulting elasticized region 1814 in this embodiment imparts a greater degree of elasticity to the elastic composite 1810 than any of the other arrangements.. A=higher elastic density is achieved by both providing for a smaller fixed distance, n', between the individual elastic elements or groups and providing for more elastic elements at application by the spin head.
Furthermore, the speed of the operation is increased from the operation associated with each of the elastic = composites in FIGS. 12A and 13A.
[0099] =It should be noted that the elastic elements within each of the two groups 1822a, 1822b =marbe varied or may be of one type. Further, the constituents of the other two group may be !different or identical. =
[00100] The elastic elements are directed generally perpendicular to the longitudinal or 'machine direction. Further, the elastic elements are structurally independent of each other, although in some.embodiments may be of (i.e., severed sections) one or more elastic strand.

In FIG. 12A, for example, all of the elastic elements are elastic elements of a single, continuous strand, although, in the Composite, the elastic elements are structurally . independent. Furthermore, each elastic element generally does not have a vertical (or longitudinal) component. As a result, a certain uniformity in horizontal elasticity is achieved.
In some embodiments, this characteristic provides an elongated elastic composite that does not tend to twist or kink when at rest, and at rest, is more uniform and aesthetically pleasing.
[00101] Table 2 below summarizes some of the benefits and advantages attained by the different manufacturing methods discussed above. To facilitate the comparisons, the number of elastic elements per unit of linear length provided by the four methods is the same. Thus, the tensile and elastic properties of the output elastic composites are similar.

Manufacturing method =SSSP ==MSSP SSDP MSDP
Number of elastic elements 1 2 2 = 4 applied per revolution Machine output 40 m/min 80 m/min 80 m/min 160 m/min Spinhead speed = 8000rpm =
Elastic elements per linear meter =

=
=400 =
Pitch (separation of elastic 2.5mm 5mm = 2.5rnm 5rrirti strands) Examples of Advantages = *Efficiency: Aesthetic:
Efficiency:
Pitch is 'A of Output Output =that for MS SP
Increased by Increased by 100% Efficiency:
300% over =

Output SSSP
= Increased by 100% over SSSP
= =
*Formula for machine efficiency: Output (m/min) = spinhead speed (rpm) x no.
of elastic elements applied per revolution x pitch x 2.
= [00102] Table 2 illustrates the design and 'operational flexibility attainable through employment of the various methods previously described. As will become apparent to one skilled in the art provided with the present disclosure,. certain methods may prove more useful = =

than others depending on the particular design and operational requirements.
In this regard, attention is now directed to the systems available to implement these manufacturing methods.
[00103] With reference to Figures 14A and 14B, a method of making an elastic composite of the invention utilizing a dual path method is now described. The inventive method is described in conjunction. with a description of an exemplary system 1901 of making the elastic composite.
[00104] FIGS. 14A and 14B depict a system 1901 and system components, and illustrate a method of making an elastic composite (e.g., elastic composite 1710 or 1810) according ,to the present embodiment. The system and its components are substantially =
similar to those previously described. The differences between the previously described syStems and the system 1901. of FIGS. 14A, 14B represent improvements provided by the present invention. These differences will be the focus of the following description.
[00105] For purposes of the present description, references will be made to upper and lower relative positions, as well as right and left directions and positions.
It will be understood by one skilled in the art that these.positional and directional references are made for description only,, and that the invention is not to be limited by their Use. Further, it will become apparent that variations of the system and process may be made, utilizing different positions and directions for the various system components and feeds.
[00106] For the most part, the system 1909 includes the same components provided,.
for example, in the system depicted in FIGS. 5-11. The system 1901 includes a conveyor = assembly 1909 for receiving, manipulating, and conveying each of the two nonwoven web inputs. The conveyor assembly 1909 is positioned next to, and operatively associated with, an elastic element applicator in the.form of a spinning head assembly 1907.
The spinning head assembly 1907 is operable to apply elastic fibers or strands upon, onto, and/or integrally with an input web of nonwoven conveyed by the conveyor assembly 1909. The spinning head assembly 1907 further includes a spinhead 1917, preferably in the form of a spinning bracket or cylinder 1917 (spinhead). The spinhead 1917 is configured to hold an "end section" of the continuous strand WW of elastic element and move it about a generally vertical plane XX in a reciprocal or repetitive manner (relative to the conveyor assembly 1909). As described previously, this Plane XX is defined by the area within the spinning perimeter of the cylinder 1917 that is traced by the outer-most bracket or eye 1917b securing the continuous strand WW to the spin cylinder *1917. It is understood that the vertical plane XX need not be at 90 to the web platforms U, L (and thus, to the web plane moving direction), but it is generally preferred. The path of the spinning head 1917 and the section of elastic strand retained thereby are provided on the plane XX. In FIG. 14A, the section of strand WW between the eyelet 1917b and the platform U is indicative of a linear portion of 5 the plane XX. =
[00107] Referring also to FIG. 16A, the conveyor assembly 1909 includes an upper conveyor or web moving platform U (web platform U) providedby a movable, continuous belt Ul and a series of rollers supporting the belt U1. The conveyor assembly 1909 further includes a lower conveyor or web moving platform L (web platform L) also provided by a 10 movable, continuous belt Ll and a series of-rollers supporting the belt Ll. In the side view of FIG. 19B, the lower belt Ll is positioned in generally parallel relation with the upper belt Ul and vertically spaced therefrom by a distance or gap HH. Although the belts Ul, Ll are designed for reciprocal motion during system operation, the belts Ul, Ll may be described as having a planar outside deck or surface Sl, S3 and a planar inside deck or surface S2, S3 at 15 any fixed point in time (for purposes of the present description). The use of "inside" and "outside" references are made in view of the relative locations.of the surfaces (i.e., facing outside of the assembly 1909 or facing inside the assembly 1909). This use of such references is provided to facilitate the description only, and should not be construed as a limitation on the inventive system and method.
20 = [00108] As represented in the plan view of FIG. 14B; each of first and second primary inputs webs w1, W2 provide a web of nonwoven utlizing a series of rollers and guides. The =
two webs Wl, W2 are first directed through folding guides or plates, which serve to effectively reduce the overall width of the nonwoven web by folding the ends or, side edges , along a predetermined, longitudinally extending side fold line. As previously described, the 25 input webs Wl, W2 are directed centrally into the gap HH between the upper and lower web platforms U, L, along a first web plane moving direction, MM and toward the spinhead 1917.
This first web plane moving direction MM also corresponds to a direction from right to left in -the side view of FIG. 14B. This first web plane moving direction MM also directs the nonwoven inputs. 1903a, 1903b toward the center of the spinhead 1907. Once inside the spinhead 1917, the conveyor assembly 1909 reverses the direction of travel of the input webs Wl, W2 (a turn of 180 degrees), from the first web plane moving direction MM
to the oppositel); directed second web plane movingdirection NN. The second web plane moving direction NN is identical (orientation) to the first web moving plane.moving direction MM, except that the directions are reversed.
[00109] As the input webs Wl, W2 exit the spinhead 1917, a first elastic strand WW is wrapped around the entire conveyor assembly 1909 and contacts the outside surfaces Sl, S3 of the belts Ul, Ll, respectively. The first elastic strand WW also comes into Contact with =
the moving webs Wl, W2. The elastic strand WW is applied crosswise or laterally on the web, and transverse to the second web plane moving direction NN. As explained previously, this transverse direction is also the cross-machine direction. Friction between the elastic strand WW and the input webs Wl, W2 on the belt surfaces Sl, S3, helps to draw the =
10. "wrapped" elastic strand WW out of the spinhead 1917.
[00110] As already described, the system 1901 positions a first elastic input source El on the left side of the system 1901 (in the views of FIG. 14A, 14B). The input source may be in the form of a spool of elastic. The continuous first elastic strand WW is delivered through a hollow shaft in a motor that controls the spinhead 1917. The elastic strand WW then passes into the spinhead 1917 and is guided by rollers, eyes, or other suitable means, around the inside of the cylinder of the spinhead 1917: .
[00111] In this particular embodiment of the present invention, the system 1909 further employs a second elastic input source E2 that is, in the views of FIGS. 14A, 14B, positioned = on the right side of the system 1901. A second continuous elastic strand WW' may be delivered via any suitable system of rollers and eyes, centrally along the gap HH and into the open end of the spinhead 1917. Upon exiting the gap HH, the second continuous elastic strand WW' is directed across the center of the spinhead 1917 and to the back of the spinhead 1917. The second continuous elastic strand WW' is then guided by rollers, eyes, or other suitable means, around=the inside face of the cylinder, to an eyelet 1917b' positioned diametrically opposite (180') of the eyelet 1917b of the first continuous=
elastic strand WW.
Thus, the first and second elastic strands WW, WW'are separated by 180 , within the spin cylinder. By taking opposite paths around the spinhead, the risk of entanglement between the two continuous elastic strands WW, WW' is substantially alleviated. Further, the elastic strands WW, WW' are preferably tensioned by passing the continuous strand through any suitable tensioning unit prior to being received b the spinhead 1917. =
= [001121 As the spinhead 1917 is spun around the upper andlower platforms U, L, sections of the first and second elastic strands WW, WW' are applied simultaneously about the two web moving platforms. U, L. Referring to the exemplary spinhead 1917 of FIGS.
14A and 14B, the eyelet 1917b' for the second elastic strand WW' is shown at a position slightly forward of the eyelet 1917b of the first elastic strand WW.
Preferably, the eyelets 1719a, 1719b are not separated as such, but aligned so as to provide a common vertical plane XX. The mis-alignment depicted in FIGS. 14A, 14B are provided primarily to best show the distribution of elastic strands WW, WW' about the conveyor assembly 1909.
= [00113] It is contemplated, however, that certain other applications may be best implemented by positioning one eyelet forward of the other, as shown. In such an npplication, the generally vertical plane XX, about which the first elastic strand WW is spun, is slightly left of a second generally vertical plane XX' (not shown), about which the second elastic strand WW' is spun. The two vertical planes XX, XX" are disposed in mutual parallel relation and both intersect the upper and lower platforms U, L. The elastic elements WW, WW' are applied onto the moving webs at these linear intersections of the vertical planes XX, XX' with the belt surfaces S1, S3 (i.e., along the web path of the nonwoven webs). The positions of the eyelets 1917b, 1917b' may be adjusted to achieve the desired pitch n' discussed =above.
[00114] In a further embodiment initially described in respect to FIGS. 24A, 24B, the position of the eyelets 1917b, 197b' are not diametrically disposed but positioned less than 180 degrees apart. In this way, the pitch between elastic elements may be adjusted to satisfy design requirements. The eyelets 2917b, 2917b' in FIG. 24A are positioned about 90 degrees apart in one direction and about 270 degrees in the opposite direction.
Operation of the spinhead 2917 provides for a web substrate 2960 whereon the elastic elements 2922a, 2922b (from elastic strands W and W', respectively) are separated by alternating pitch distances of n (n1) and 3n (n2).
1001151 FIGS. 15A and 15B depict an alternative system 2001 (to the system 1901 of FIGS. 14A and 14B) for making the elastic composite according to the invention (wherein like reference numerals are used to indicate like elements)., .In this embodiment, a bracket system 2090 of tensioning rollers is provided proximate the end of the web platforms U, L
and the end of the gap HH. The bracket system 2090 directs the second continuous elastic 'strand WW away from the centerline AA of the spinhead momentarily to avoid front rollers 2084. The bracket system 2090 may be supported or suspended between the upper and lower webplatforms U, L, and in between the input webs Wl, W2, by any suitable means.

[00116] Returning to FIGS. 14A and 14B, further description of the invention system and method will now be= provided, particularly that of the intersection between the primary input webs W1, W2, continuous strands WW, WW', and secondary input webs W3, W4.
FIGS. 16A-16D provide cross-sectional views through the system 1901.depicted in FIG. 14.
These simplified views are provided to illustrate certain points in .the process of applying = elastic elements onto the nonwoven webs. Referring to FIG. 16A, a first cross-sectional view also is presented proximate the ends of the two web platforms U, L. The view reveals =
cross-:sections of the two continuous belts Ul, Ll. This view includes cross sections showing outside belt surfaces Sl, S3, and inside belt surfaces S2, S4. As viewed in FIG. 16A, the two inside belt surfaces S2, S4 move out from the page along the first web plane moving= direction MM and convey the input webs W1, W2 into the spinhead 1917. The two outside surfaces Sl, S3 move into the page along the second web plane moving direction NN and convey the webs Wl, W2 away from the spinhead 1917. The input webs W1, W2 of nonwoven are =
shown on the belts U1., Ll with their ends already folded.
[00117] As used herein, the term "web plane path" shall mean the path (including direction) taken by the input webs W1,=W2 as conveyed by the conveyor assembly 1909. For one input web, the "web. plane path" includes the path along the inside surface S2 of the continuous belt U1= directed along the first web plane moving direction MM and the path along the outside surface S1 of the same belt Ul directed along the second web plane moving direction NN. The web plane path of the other input web is different from the first web plane=
path, although it is also directed, in certain segments of the path, in the same web plane moving directions MIVI or NN. As described herein, the vertical plane XX, XX' intersects the=
web plane path on the outside belt surface S1 and along a transverse line common with the web plane path. =
[00118] Referring to FIG. 16B, a cross-sectional view is provided across a section .further away from the spinhead. At this point in the process, the spinhead 1917 has applied several sections of the first and second continuous elastic strands WW, WW' about the conveyor assembly 1909, and more specifically, over the input webs Wl, W2. In doing so, the spinhead 1917 has applied the continuous elastic strands WW, WW' transversely in respect to the second web plane moving direetion NN.
[00119] Referring to FIG. 16C, a cross-sectional view is provided across a section downstream of the rollers for the third and fourth input webs W3, W4 of nonwoven. The rollers facilitate the application of a second web layer upon each substrate that now includes .
the elastic elements and a first nonwoven web. In this manner, a moving web of elastic composite is produced consisting of a top layer of nonwoven sheet, a base layer of nonwoven sheet, and elastic elements sandwiched therebetween. At this point, the ends of the input webs Wl, W2 are still folded around the ends of the belt surfaces Sl, S3. The view of FIG.
21C also indicates the locations of knife mechanisms KK where the elastic strands WW, = WW' are cut immediately downstream of the cross-sectional view.
As.discussed previously, the cuts may be provided by knife structures located adjacent the web platforms Ul, Ll.
[00120] Thecross-sectional view of FIG. 16D represents a point further downstream in the process. In this view, the continuous elastic strand WW, WW' has been Out to provide a distribution of segmented elastic elements 1722 within the web substrate.
Every other segmented elastic element 1722 in the distribution is characterized as having originated from the same first or second continuous elastic strand. Further, each pair of adjacent or sequential elastic element 1722 are characterized as having originated from a different . continuous elastic strand. This view also reveals that the first and second input webs 1903 have been unfolded, in a manner described previously. FIG. 16D depicts, therefore, a cross-section of web outputs 01, 02 of the system and method of manufacture, according to the invention.
= [00121] FIG. 17 provides a simplified flow chart of the basic steps of a method of .20 making an elastic composite, in accordance with the present invention.
The flow chart 2210 also provides a summary of the process described in respect to FIGS. 19-21.
The basic steps of the method are preferably performed through operation of a system such as the exemplary systems 1901, 2101 of FIGS. 14 and 15. In an initial step 2210., a first web of material (e.g., = a nonwoven layer) is conveyed along a web plane path. The web plane path is simply a path along which a web having an expanse (i.e., width and substantial length) may be conveyed.
= The web plane path is preferably controlled by a fixed system to provide a consistent path for a moving, continuous web, directed along a predetermined web direction (which is planar).
As illustrated previously, the web plane path is generally predetermined, in the preferred embodiment, by the web platforms of a conveyor assembly and the conveying step 2210 is .30 implemented through operation of the web platforms. A section of a first continuous elastic strand is then applied onto the first web and generally transversely to the web plane path (Step 2214). Further, a section of a second elastic strand is applied onto the second web and generally transversely to the web plane path (Step 2218). These steps 2214, 2218 are preferably performed through operation of a single spinhead that spins the two strands about the first web being conveyed and about a plane(s) that intersects the moving web. By repeating the applying steps while performing the conveying step, a plurality of sections of 5 the first and second elastic elements is arranged on the first web in generally parallel relation (Step 2222). As previously explained, this plurality of elastic elements distributed longitudinally along the web and in mutual parallel relation provides an elasticized region in the web output and in each individual, finished elastic composite product, according .to the . present invention.
10 [00122] FIGS. 13-17 depict a system and system components, and illustrate a method . of making an elastic composite according to another einbodiment of the invention. Again, = the depicted system and its components are substantially similar in structure and operation to those previously described. Applicable detail descriptions of the system components and operation may be borrowed from earlier portions of this disclosure.
Differences between the 15 previously described systems and the systems to be described represent or arise from improvements provided by the presentembodiment. Such differences are discussed herein in more detail.
[00123] FIG. 18 provides a plan view of the inventive system 2301. FIG. 19 provides . a perspective, isometric view that reveals several of the components of the inventive system.
20 Directional arrows are provided throughout FIG: 19 to indicate the movement of conveyors, web of materials or elastic composites, the spinhead assembly, and the like.
[00124] In this particular set of embodiments, a system provides and a method is implemented for making an elastic composite, whereby a continuous strand of elastic is -applied onto a first and a second web along a direction generally transverse to a web plane 25 moving direction. In these embodiments, the first and second input webs are conveyed along the web plane moving direction. This means that a plane may be extended from (and including) one web into (and including) the other web, and the two webs move along that plane in the. same direction (L e., parallel directional vectors, such as 90 degrees horizontally and vertically of the vertical plane XX). The two moving webs are, therefore, generally 30 coplanar about the locations or sections Whereupon a section of the elastic strand is applied to both webs. Moreover, the section of elastic strands is applied generally "linearly" onto both the first and second webs. As used heretofore, this reference to the section of krand being applied "generally linearly" means that the applied section generally =provides a linear segment that extends across the planes of both the first and second webs and includes a shorter linear segment on each of the first and second webs.
[00125] Referring to FIGS. 18 and 19, as well as the cross-sectional view of FIG. 25A, a system 2301 is provided to implement the inventive method and produce a web output 01 of inventive elastic composite and preferably a second web output 02. A
conveyor assembly . .2309 is provided having a web platform U and preferably a second web platform L (for outputting second web output 02). In this embodiment, an upper web platform U
is positioned above, and generally aligned with, a lower web platform L. Each web platform U, L is referred to as having a pair of conveyors in the form of movable continuous belts.
Referring specifically to the cross-sectional view of FIG. 20A, a left continuous belt Ul of the upper platform U is spaced laterally from a second continuous belt U2.
Lower web platform L also has similarly positioned left continuous belt Ll and right continuous belt L2.
[00126] The continuous belts Ul and U2 are referred to as having, at any given point in time, an inside deck or surface S3, S4 that is moving toward the spinhead 2317 (in the web"
plane moving direction MM) and an outside deck or surface Sl, S2 that is moving away from the spinhead 2317 (in the web plane moving direction NN). As will be further described below, the outside surfaces S3, S4 are generally co-planar or at least corresponding sections of the surfaces S3, S4 are, such that sections of input webs supported: on the corresponding sections are co-planar and positioned to receive a section of elastic strand that extends lineealry across the two webs. Similarly, continuous belts Ll, L2 have inside suifaces S7, S8, which are moving toward the spinhead 2317, and outside surfaces S5, S6, which are moving away from the spinhead. Accordingly, the pair of inside surfaces for each web platform may be referred to as being generally disposed on the same imaginary, extended plane and the pair of outside surfaces may be referred to as being generally disposed on another imaginary, extended plane. In these preferred embodiments, the two imaginary, extended planes are spaced vertically apart and generally disposed in parallel relation. Thus, S1 and S2 are generally on the plane, as are S3 and S4, S7, and S8, and S5 and S6. The pairs of continuous belts are, therefore, operable to convey a pair of input webs along a predetermined web plane path, first along a first web plane moving direction toward the = spinhead and a second, reversed, web plane moving direction away from the spinhead. It is . preferred, of course, to convey the pair of input webs at the same time.

[001271 An elastic applicator assembly 2307, including a spinhead 2317, in this embodiment, has a construction that is consistent with that previously described in respect to FIGS. 5-8. It will be apparent, however, that sizes and dimensions may be different to accommodate the dual web platform assembly. In any event, a single input source El of a continuous elastic strand WW is provided and received.by a motor operatively associated with the spinhead described before. The spinhead 2317 includes arms as described previously, and a series of rollers and eyelets for routing and applying the continuous elastic.
strand WW about the conveyor assembly 2309 and about the generally vertical plane XX.
[00128] Referring now to FIG. 19, this exemplary system is provided with four =
independent sources of a primary input web of nonwoven: a first input web W1 *arriving from an upper part of the system; a second input weby2 lower web arriving also from an upper part of the system; a third input web W3 generally below the first input web Wl; and a fourth input web W4 generally below the second input web W2. Each of the four primary input webs W1-W4 is preferably processed through a folding mechanism, as described previously.
. 15 The four input webs are then moved along a first web plane moving direction MM and in between the upper and lower web platforms Ul, Ll. Movement of the input webs is, of =
course, driven by the four continuous belts Ul, U2, Ll, L2.
1001291 The exemplary system is further provided with an upper secondary input web W5 of nonwoven positioned above the conveyor assembly 2309 for applying a base layer simultaneously to a pair of elasticated substrates as will be described below.
Similarly, a.*
lower secondary input web W6 is provided for applying a base layer, as will also be = discussed below. Finally, a pair of large rollers 2342, 2344 is positioned downstream of the conveyor assembly 2309. Each roller serves to output a web 01 or 02 of elastic composite from the system. For this exemplary system and process, that web output 0.1, 02 will provide a dual-elasticized elastic composite 2322 according to the invention.
=
[00130] Each of FIGS. 20A-20C provides a cross-sectional view through various points in the process and through sections of the system depicted in FIG.= 23.
The cross-sectional view of FIG. 25A is placed to highlight the two web platforms U, L, the four = continuous belts Ul, U2, Ll, L2, and the four input webs W1-W4 conveyed thereon. The 30*
four webs W1-W4 are conveyed in a direction coming out of the page and toward the spinhead (i.e., first web plane moving direction MM). As also shown in FIG.
20A, the ends of the input webs WI-W4 enter the spinhead 2317 in a folded configuration.

[00131] The cross-sectional view of FIG, 20B is provided downstream of the spinhead 2317 and of the vertical plane XX. Thus, an elastic strand WW is applied continuously about the conveyor assembly 2309 and upon each of the four primary webs W1-W4 of nonwoven.
Friction between the input webs W1-W4 and the applied elastic strand WW helps draw the continuous strand WW from the spinhead 2317.
[00132] Turning to FIG. 20C, the cross-sectional view is moved further downstream in .
the process. Specifically, the cross-section is provided at a point in the process after application of the secondary web inpins W5, W6. In one aspect of the present invention, one secondary input web is used in conjunction with the two primary input webs to creat the elastic composite. A secondary nonwoven is shown applied upon the substrate combination of elastic elements and adjacent pair. of input webs (W1 and W2; W3 and W4).
The application of the secondary input web W5, W6 of nonwoven provides, therefore, an elastic composite: FIG. 20C also illustrates the use of central folded section F.1, F2 in each .
secondary input webs W5, W6. The secondary input web W5, W6 is folded so as to later reveal a central dead zone between two elasticized regions of the elastic composite. This feature of the.inventive elastic composite is discussed in further detail below.
[00133] FIG. 20C also indicates the location of a knife mechanism KK.
downstream of the cross-section as discussed previously. At these horizontal locations, the knife mechanisms cut elastic strand WW, thereby severing elastic elements from the continuous strands. The cuts also separates the process into an upper process and a lower process. More specifically, the cuts separates the upper, moving substrate consisting of input webs Wl, W2, .
secondary input web W5 and elastic elements therebetween, from a similarly constituted lower, moving substrate. Additionally, another pair of knife mechanisms KK' is positioned at locations downstream of the cross-sectional view and, above, and below, the centers of the = web platforms U, L. The knife mechanisms KK' are located. to purposefully coincide with the middle of the central folded sections Fl, F2. At these locations, the continuous elastic strand WW (or elastic element, if knife Mechanisms KK.' are downstream of knife mechanisms KK) is severed to provide a left and right elastic segment or element in the finished elastic composite. As already discussed, this also provides right and left elasticized regions and leaves the central part of the web absent of. elastic elements.
Thus, when the folded sections F1, F2 is unfolded, the central dead zone is needed.
=

[00134] FIG. 21 provides a cross-sectional view of a finished web output of the system and process. Two identical web outputs 01, 02 of elastic composites are provided.
= Referring to the web 01, a first nonwoven layer is provided by the pair of primary input webs = Wl, W2, a second nonwoven layer is provided by the single secondary input web W5, and a pair of elasticized regions 2614 therebetween make up the finished elastic composite web.
The elasticized regions 2614 are provided by a distribution of elastic elements 2622 that are =in generally parallel relation and extend laterally. The elastic elements also provide, as a result, elasticity in the lateral direction and without a vertical component.
The two elasticized regions 2614 are laterally spaced from one another to provide a dead zone 2650 therebetween. As discussed above, the dead zone results from cutting the elastic strand WW
or elastic element using the knife mechanisms KK' and the unfolding of the folded sections =
Fl, F2. Dead zones are also provided between the side edges of the nonwovens.
and each of the elasticized regions: The side dead zones result partly from the unfolding of the= folded ends of the primary input webs W1 -W4. These unfolding steps may be performed immediately downstream of the .two knife mechanisms in a manner previously described in this disclosure.
[00135] The width of the central non-elasticized region or dead zone 2650 may be = controlled by controlling the lateral separation between the pairs of belts in each web platform (e.g., the space between Ul and U2 and the space between Ll and L2).
It may also =
be contrglled by specifying the width of the excess fold in the center of the secondary web.
This fold is configured to retain some of the material away from the composite during the process and is typically opened up downstream to reveal=the central non-elasticized region or dead zone.
[00136] In an alternative embodiment, the system 2301 and method are modified to produce four web outputs and four separate elastic composites, according to the present invention. In one variation, the knife mechanisms KK' may be modified to also sever the secondary input webs W5,W6 (in addition to the elastic strand WW): =In this way, each of the two web substrates is divided to produce an independent elastic composite to the left and also to the right of the knife mechanisms KK'. Each elastic composite has a single central - 30 elasticized region and two side dead zones: In the method to create the pairs of elastic composites, the width of the folded sections FL F2, may be provided to correspond with the = folded ends of the primary input webs.

[00137] In yet another alternative embodiment, four independent secondary input webs are used instead of two. Each secondary input web joins with a primary input web, with elastic elements, thereon, to produce an elastic composite having a centralized region. The elastie composite also has a pair of dead zones on either side of the central elasticized region.
5 [00138] FIG. 22 provides a simplified flow chart of the basic steps of a method of.
= making an elastic composite, in accordance with this embodiment of the present invention.
The flow chart 2700 also summarizes the process described above in respect to FIGS. 23-25.
The basic steps of the method.are preferably performed through operation of a system such as the exemplary system 2301 in FIGS. 18 and 19.
10 [00139] In initial steps 2710, 2714, a first web= of material is conveyed along a web plane moving direction and a second web of material is conveyed along the web plane moving direction. Preferably, the web plane moving direction is predetermined by the web platforms of a conveyor assembly and the conveying steps 2710, 2714 are implemented through operation *of the web platforms. A section of a first continuous elastic strand is then 15 applied generally linearly onto both the first and second webs along a direction generally transverse to the web plane moving direction (Step 2718). The applying step 2718 is preferably performed through operation of a spinhead that spins the elastic strand about the first and second webs as these webs are conveyed along the web plane moving direction. =
Preferably; the applying step 2718 is performed while performing the conveying steps 2710, 20 2714 such that a plurality of sections of the first and second elastic elements are arranged on each of the first web and the second web in generally parallel relation. The elastic elements are distributed longitudinally along the web and in mutual parallel relation, so as to provide, in the finished elastic composite, an elasticized region. In one embodiment, the first and = second webs Provide a top or base layer and the first and second arrangements of elastic 25 = elements provide the pair of elasticized regions.
[001401 Each of FIGS. 23A-23C illustrates an elastic composite 2810, 2810', 281Creontaining a pair of elasticized regions 2814, 2814', 2814" and three non-elasticized zones or dead zones, including a central dead zone 2850, 2850', 2850" extending longitudinally between the two elasticized regions 2814, 2814', 2814" and side dead zones (2816, 2816', 2818"), (2816, 2816", 2818") on the other side of each elasticized 30 region 2850, 2850', 2850". The elastic composite 2810, 2810', 2810" may be referred to herein as a dual-elasticized elastic composite. In FIG. 23A, the elastic composite 2810 shown is formed from two discrete composite sections Cl, C2. Each composite section CI, C2 is manufactured independently as a discrete elastic composite having a single elasticized region. Any one of the three methods described herein may be employed to make the singly elasticized composite section. To form the dual-elasticized elastic composite, two of the singly elasticized composite sections are joined =
together by overlapping one side edge of one composite section over a side edge of the other composite section. A suitable adhesive or adhesive=means may be used to maintain bonding at the overlap. The overlap creates a multi-layer bonding portion B as shown in FIG. 28A, which also serves as a *portion of the central dead zone.
[00141] The bonding portion B consists of a top nonwoven layer 2818 and a base layer 2820 of each composite section. Accordingly, the thickness of the bonding portion B and the central dead zone 2850 may be significantly, or at least observably, greater than the thickness of the rest of dual-elasticized elastic. composite. For each composite section C1, C2, the top nonwoven layer 2818 and the base nonwoven layer 2820 have the same width and the side =
edges are aligned.
[00142] Turning to FIG. 23B, a second dual-elasticized elastic composite 2810' is shown again consisting of two adjoined singly elasticized, composite sections C1', C2'. For -each composite section C1', C2', one of a top layer 2818' and a bottom layer 2820' is wider than the other. Referring to the view of FIG. 283B, the right composite section C2 has a = bottom layer 2820' that extends laterally farther than the top layer 2818', thereby forming a =
step. For the left composite section, the top layer 2818' extends laterally farther than the bottom layer 2820', thereby forming a ledge. By abutting the !edged side=edge to the stepped side edge, a suitable construction joint is provided between the two composite sections C 1', C2'. An overlapping bonding portion B' (and central dead zone 2850') is also provided that consists of a single top layer 2818' and a single base layer 2820' and is characterized by a thickness generally consistent with the other portions of the dual elasticized elastic composite 2810'. A suitable adhesive or adhesive means may be employed to facilitate and maintain = .bonding between the layers of the bonding portion.
[00143] FIG. 23C illustrates an improved dual elasticized elastic composite 2810" that may be manufactured in accordance with the method described in respect to FIGS. 18-21, in accordance with the present invention.= In addition to a pair of elasticized regions 2814", the elastic composite also has two side dead zones 2816" and a central dead zone 2850" situated between the elasticized regions 2814"; The thickness of the dead zone 2850" is provided by a single top layer 2818" and a single base layer 2820" and is, therefore, consistent with the thickness of other portions of the dual elasticized elastic composite 2810".
In one aspect of the present invention, the dual elasticized elastic composite 2810" provides a single composite-structure. The base layer 2820" of the elastic composite 2810" is provided by a seamless sheet of nonwoven (or other material). The elastic composite 2810"
does not require joining of two discrete elastic composite sections. Rather, a web of the dual elasticized elastic composite 2810" is generated linearly as output of the method described in respect to FIGS. 18-22. A seamless composite structure, the dual elasticized composite 2810 eliminates the bonding region required of the elastic composites in FIGS. 23A
and 23B and thus, avoids the potential for leakage generally associated with these bonding regions B, B'.
The seamless composite structure is also more structurally sound than the other composites .
and has a higher tensile strength (laterally and longitudinally).
[00144] As used herein, the term "seamless composite structure" shall refer to a structure that does not have a seam at which two or more originally independent sections are joined as one to form the present structure. It should be noted that the top layer 2818" of the elastic composite 2810 in FIG. 23C may provide a single seam S" along the central dead zone 2850" and thus, may not be referred to as "seamless." This seam S" of the tap layers 2818" is not, however, a seam of the elastic composite 2810" as that seam S"
does not extend through the -thickness of the dead zone 2850" and the multi-layer composite 2810", and is not required to join two independent sections of the elastic composite 2810".
[00145] As expected, the dual elasticized elastic composite 2810" is generally easier to manufacture than the other composites in that it does not require the joining and bonding = steps required described previously. It also does not require the machines or manpower to implement these steps. Furthermore, the seamlessness of the elastic cOmposite 2810" is generally more aesthetiCally pleasing than the bonding regions B, B'. By eliminating or reducing the use of adhesives, the central dead zone of the present elastic composite is also generally cleaner. Further advantages and benefits of the dnal elasticized composite according to the invention, or of the method of making same, will be apparent to one generally skilled in the art.
[00146] The foregoing description of the present invention has been presented for purposes of illustration and description. 'It is tO be noted that the description is not intended to limit the invention to the various systems, apparatus, and processes disclosed herein.
=
Various aspects of the invention, as described above, may be applicable to other types of disposable absorbent articles, garments, and the like, and processes for making the same. For example, the elastic composite described above, may be incorporated in other disposable absorbent garments such as training pants, etc. or in other areas or as other components of the garment. The elastic composite may also be incorporated into or with other garments, = textiles, fabrics, and the like, or combinations thereof. Moreover, the various aspects of the process described in respect to FIGS. 12-23 may be utilized to produce compositions, garments and articles other than those described herein. Such variations of the invention will become apparent to one skilled in the relevant consumer products art provided with the present disclosure. Consequently, variations and modifications commensurate with the above teachings, and the skill and knowledge of the relevant art, are within the scope. of the present invention. The embodiments described and illustrated herein are further intended to explain the best modes for practicing the invention, and to enable others skilled in the art to utilize the = invention and other embodiments and with various modifications required by the particular =
applications or uses of the present invention.
=
=

Claims

1. A method of making an elastic composite for incorporation into a disposable absorbent garment, textile or fabric structure, and the like, said method comprising the steps of:
conveying a first web of sheet material on a moving platform along a first web plane moving path;
conveying a second web of sheet material on a moving platform along a second web plane moving path generally parallel with the first web plane moving direction; and applying a section of a continuous strand of elastic element onto both the first web and the second web along a direction generally transverse to the web plane moving paths.

2. The method of claim 1, wherein the first and second webs being conveyed along the first and second web plane moving paths, respectively, are spaced laterally apart such that the section of elastic strand is applied generally linearly along a transverse line extending across the first web and the second web.

3. The method of claim 1, wherein said conveying steps include positioning the first and second webs such that the first and second webs are generally coplanar about sections whereupon the section of continuous strand is applied.

4. The method of claim 1, further comprising the steps of:
spinning the section of elastic strand generally about a plane;
wherein said conveying steps includes conveying the first and second webs of sheet material along the web plane moving paths such that the first and second webs are spaced laterally apart and intersect the plane, thereby applying the section of elastic strand onto the first web and the second web.

5. The method of claim 4, wherein the section of elastic strand is spun about the plane in a reciprocal pattern to periodically apply the section of elastic strand onto the first and second webs, thereby applying a plurality of elastic elements onto the first and second webs.

6. The method of claim 5, wherein the plurality of elastic elements are applied in generally parallel relation on the first and second webs.

7. The method of claim 6, wherein the section of elastic strand is applied generally perpendicular to the web plane moving paths.

8. The method of claim 5, further comprising the step of applying a web of material onto the first and second webs having a plurality of elastic elements applied thereon, thereby providing a web of elastic composite.

9. The method of claim 5, further comprising the step of applying a single web of material onto both first and second webs having a plurality of elastic elements applied thereon, thereby providing a web of elastic composite comprising a single layer of the single web, laterally spaced layers of first and second webs, and a plurality of elastic strands sandwiched therebetween.

10. The method of claim 5, further comprising the step of cutting the elastic strand between the first and second webs, thereby providing a web substrate having a pair of spaced apart longitudinally-extending elasticized regions and a non-elasticized region therebetween.

11. The method of claim 5, further comprising the step of cutting each applied section of elastic element proximate each lateral side edge of the first and second web, thereby separating each section from the continuous strand and leaving a segmented elastic element on the first and second webs.

12. The method of claim 4, wherein each of the first and second webs is moved by a conveying platform that intersects the plane of the moving section of elastic strand the method further comprising the steps of first conveying the first and second webs on inward faces of the platforms in an initial web plane moving direction and then redirecting the webs to outward faces of the platform and along a second web plane moving direction opposite the first web plane moving direction upon reaching one end of the platforms.

13. The method of claim 12, further comprising the steps of conveying a third web of material spaced generally perpendicular from the first web and a fourth web of material spaced generally perpendicular from the second web, each of the third and fourth webs being moved along web plane moving paths generally parallel with the first and second web plane moving paths, and wherein said applying step applies a section of elastic strand onto the first, second, third and fourth webs along directions generally transverse to said web moving direction.

14. The method of claim 1, further comprising the step of applying a single web of material onto the first and second webs after said applying step, thereby providing a web of elastic composite comprising a single layer of the single web, laterally spaced layers of first and second webs, and a plurality of elastic strands sandwiched therebetween.

15. The method of claim 14, further comprising the step of cutting the applied elastic strand between the first and second webs, thereby providing a web substrate having a pair of spaced apart longitudinally-extending elasticized regions and a nonelasticized region therebetween, and wherein said step of applying a matching web includes providing a fold centrally along the single matching web, said method further comprising the step of unfolding the central fold after said cutting step to reveal a central non-elasticized region.

16. A system for making an elastic composite for incorporation into a disposable absorbent garment, textile, or fabric structure, and the like, said system comprising:
a first web moving platform for moving a first web of nonwoven thereon; and a second web moving platform for moving a second web of nonwoven thereon;
and a spinning head for applying a section of a first continuous elastic strand about said web platforms and the first web and the second web being moved therealong, said spinning head being positioned about said first and second web moving platforms to spin the section of elastic about a plane intersecting the first and second webs moving therealong; and wherein said first and second web moving platforms are spaced laterally apart.

17. The system of claim 16, further comprising a third web moving platform for moving a third web thereon and a fourth web moving platform for moving a fourth web thereon, wherein said third platform is spaced below said first platform, said fourth platform is spaced below said second platform, and said third platform is spaced laterally from said fourth platform; and wherein said spinning head is positioned about said first, second, third, and fourth platforms to spin said section of elastic about said plane intersecting each of said webs and applying elastic thereto.

18. The system of claim 17, wherein said platforms are adapted for reciprocal motion such that the first or second web is initially moved in a first direction then moved in a second direction opposite the first direction, each web being exposed to application of the section of elastic strand while moving in the second direction.

19. The system of claim 16, wherein each said web moving platform includes a continuous movable belt.

20. The system of claim 16, further comprising:
a first source of the first web of material;
a second source of the second web of material; and a folding assembly operatively positioned between said sources of said first and second webs and said platforms, said folding assembly being adapted to folding side edges of said webs to create folded flaps prior to the webs being directed to the plane.

21. The system of claim 16, further comprising:
an input source of a third web of material; and a conveying assembly for conveying said third web toward the first and second webs after said elastic strand is applied along the first and second webs, thereby creating a web substrate of a first and second web, a third web, and a plurality of elastic elements sandwiched therebetween.

22. The system of claim 16, wherein said spinning head includes a drum having a dispenser for dispensing the continuous elastic strand, said drum being generally positioned about said web conveyor assembly to define a plane therethrough.

23. A method of making an elastic composite, said method comprising the steps of:
conveying a first web of a sheet material on a moving platform, whereby the first web moves along a predefined path;
applying a first section of a first elastic strand, onto the first web transversely on the moving platform and generally transversely to the moving web;
applying a second section of a second elastic strand onto the first web transversely on the moving platform and generally transversely to the moving web; and repeating said applying steps while performing said conveying step, thereby arranging a plurality of first and second elastic elements on the first web, in generally parallel relation to one another.

24. The method of claim 23, wherein each of said applying steps includes spinning the first or second sections about an elastic applying plane that intersects the predefined path, the method further comprising feeding each of the first and second elastic strands from a source spaced from the elastic applying plane, whereby a continuous strand is directed linearly from the source to the elastic applying plane.

25. The method of claim 23, wherein the first and second sections of elastic strand are applied to the first web by spinning the sections about an elastic applying plane that intersects the moving web.

26. The method of claim 25, further comprising feeding a first continuous strand of a first elastic strand having the first section, from a first direction toward the elastic applying plane and feeding a second continuous strand of a second elastic having thed second section, from a second direction toward the elastic applying plane.

27. The method of claim 26, wherein each of the first and second continuous strands are directed centrally toward one of the elastic applying planes.

28. The method of claim 26, wherein said spinning includes operating a spinning head to spin the sections about the plane and wherein each of the first and second continuous strands are directed to the spinning head from a source spaced from and supported independently of the spinning head.

29. The method of claim 23, wherein each said applying steps include spinning the first and second elastic strands about a plane simultaneously with said conveying step, whereby the plane intersects the moving web and whereby said first and second sections are applied simultaneously onto the first web in side by side generally parallel relation.

30. The method of claim 23, wherein said applying steps include alternately applying sections of first and second elastic strands on the web.

31. The method of claim 23, further comprising spinning sections of two separate continuous strands to effect said applying steps, such that a pair of spaced apart sections of elastic element is applied onto the first web within each spin revolution, and wherein said spinning and applying steps are repeated to apply a plurality of pairs of elastic elements on the first web in spaced apart, generally parallel relation.

32. The method of claim 23, wherein the first section is fed by a first continuous elastic strand and the second section is fed by a second continuous elastic strand independent of the first continuous strand.

33. The method of claim 23, wherein said applying steps are performed to provide a distribution of alternating first and second elastic elements on the first web, whereby the pitch between successive pairs of first and second elastic elements is alternated between a first pitch and a second pitch.

34. The method of claim 23, wherein the sections of elastic element are moved about a plane intersecting a web plane path of the first web in a reciprocal pattern to periodically apply the sections of elastic element onto the first web, thereby applying a plurality of elastic strands onto the first web, wherein the elastic strands are applied in generally parallel relation on the first web, said method further comprising the steps of:
cutting each applied section of elastic element at opposing ends applied proximate the lateral side edges of the first web, thereby providing a plurality of distinct elastic elements on the first web; and applying a second web of material onto the first web having a plurality of elastic elements applied thereon, thereby providing a web of elastic composite comprising of at least two layers of material and a plurality of elastic strands sandwiched therebetween.

35. The method of claim 23, further comprising the step of conveying a second web spaced apart from the first web and along a second web plane path that is generally parallel with a web plane path of the first moving web, whereby said applying steps applies elastic elements on outward faces of the first and second webs of material.

36. A system for making an elastic composite for incorporation into a disposable absorbent garment, said system comprising:
a source of a first web of material;
a web conveyor including a first web moving platform for moving the first web thereon along a first web plane path; and a spinning head for applying a section of a first continuous elastic strand and a section of a second continuous elastic strand about said web conveyor and a first web being moved thereon, said spinning head being positioned such that the first web being conveyed on said platform is movable into the path of each of the two sections 30 of elastic strand being spun by said spinning head to apply the two sections thereon.

37. The system of claim 36, wherein said platform is adapted for reciprocal motion such that the first web is initially moved in a first direction then moved in a second direction opposite of the first direction motion for application of the two sections of elastic strand.

38. The system of claim 36, further comprising a first source feed of the first elastic strand and a second source feed of the second elastic strand, wherein said first and second source feeds are directed from opposite directions toward said spinning head.

39. The system of claim 38, wherein said spinning head includes a first strand dispenser for receiving the first elastic strand and dispensing the first section and a second strand dispenser for receiving the second elastic strand and dispensing the second section, said strand dispensers being spinnable about said conveyor.

40. The system of claim 39, wherein said spinning head is positioned for spinning the first and second sections about a plane transversely intersecting the first web moving along said first web moving platform along a linear intersection generally perpendicular to the first web plane path.

41. The system of claim 38, wherein the first source feed is spaced laterally from the spinning head to direct a continuous first elastic strand linearly between the first source feed and the spinning head; and wherein the second source feed is spaced laterally from the spinning head to direct a continuous second elastic strand linearly between the second source feed and the spinning head assembly.

42. The system of claim 41, wherein the continuous strands are directed generally centrally toward a center axis of the spinning head.

43. A method of making an elastic composite, said method comprising the steps of:
conveying a first web of sheet material on a moving platform along a moving direction;
feeding a first continuous strand of a first elastic strand from a first direction;
feeding a second continuous strand of a second elastic from a second direction;
spinning a first section of the first elastic strand onto a moving first web and generally transversely to the moving first web;
spinning a second section of the second elastic strand onto the moving first web and generally transversely to the moving first web; and repeating said spinning steps while performing said conveying step, thereby arranging a plurality of first and second elastic elements on the first web, in generally parallel relation to one another; and wherein each of the first and second sections of elastic strand is applied to the first web by spinning the section about an elastic applying plane that intersects the moving first web and the first and second directions and the first and second sections of elastic strand are fed from the first and second directions to the elastic applying plane.

44. The method of claim 43, wherein said spinning steps include alternately applying sections of first and second elastic strands on the web; and wherein the spinning and conveying steps are performed such that a pair of spaced apart sections of elastic element is applied onto the first web within each spin revolution, and wherein said spinning steps are repeated to apply a plurality of pairs of elastic elements on the first web in spaced apart, generally parallel relation.

45. The method of claim 43, wherein said spinning steps are performed to provide a distribution of alternating first and second elastic elements on the first web, whereby the pitch between successive pairs of first and second elastic elements is alternated between a first pitch and a second pitch.

46. The method of claim 43, wherein said spinning steps are performed by operating a spinning head positioned about the moving first web, the feeding steps including directing a continuous first and second elastic strand from a first or second feed source toward the spinning head assembly, whereby the elastic strand is supported about the spinning head for less than one turn.