US2448928A - Rug - Google Patents

Description

Patented Sept. 7, 1948 UNITEDW STATES OFFICE direct and mesne assignments, to Libertyvilley Textileadne., Lbertyvilleflll., a corporation ofi Illinois Application September 23, 1945Seral No. (i1-9,133;

3V Claims. (Cl. filet-27 8)!1" This invention relates to "a rugv and' is Darticularly useful in the type ofrug in which pile warp threads are stitched 'toa fabric base.

The type of rug `in which .pile warp threads are stitched to a fabric base is cheaply and easily formed because the pile threads can be stitched readily tothe'base inan inexpensive sewing opreati-on and'large volumes of rugs are thus quickly produced.' Such rug-s, however, have the sharp disadvantage ofp-resenting a rather'srnooth and flat surfaceto the oor andthe rugs slip easily when steppedA on. Furthermore, since thepile warp threads themselves do not pass through the fabric base butare secured to the base solely by threads, the structure is weak in that tension placed upon anyof 'the warp threads tends to draw the'stitching threads 'through'the fabricv andthus to lproduce anuneven pile. Since pile warp threads are --secured Vto the base by stitching and .usually by sewing machine stitching, there is alimit to the size andcharacter of the stitching threads and the rug, which is otherwise 4sturdy and serviceable, has. its 'weak 'link in vthe stitching connections.

An object ofthe presentLinvention's to provide the fabric base and stitched form' of rug referred .to with means for reinforcingthe stitching threadsafter they are in place, to protect them against breaking and to lock them against being pulled through .the-fabric base while, at the saine "time, presenting to the floor surface means for retaining the rug-in placeoandfpreventing its slipping. A further object'is to provide a rug formed of a fabric base and pile warp threads stitched thereto in which at least some oi the stitching threads extending to the underside of the fabric are provided with a `rug position-fixing compositionv which strengthens the threads, locks `thern against being pulled |through the fabric, and provid-es a gripping surface' which maintains the rugin position on 'the floor. Other objects and advantages will appear as the specification proceeds.

The inventionlis illustrated'in a preferred embodiment, by the accompanying drawing, in which- Figure l is la broken perspective view of a portion of a rug constructed in accordance with my invention; Fig. 2, a broken detailed view showing the stitching which connects the pile warp thread-s to the fabric base; Fig. 3, a transverse sectional view of a 'stitching thread provided with a coating of latex; Fig. 4, Va View similar to Fig. 3 but showing the stitching thread provided with a resinous coating; and Fig. 5, a view similar to Fig. 2..but showing the 'threads overtwisted and" stitched tothe fabric iin over-twisted condition.

In theillustrationgiven; I0 designates a fabric-base whichrnaycorrsist of canvas or any other suitable fabric .body'f' Tothe fabric base is stitched `the warp pile threads I I, which are-shown in the iormof loops'. The loops'may be over-twisted', as illustra'tediri Fig'. 5, oi withouty twist, as illustrated in Figs. 1and'2; The warppilethreads may not be in thefo'rrn` of loops 'but' may be stitched to 4the fabric 'in any other desired shape orlposition. Whenth'e threads II are s-titched to the fabric inthe forrn illustrated, the loops themselves,` after stitching," maybe severed at their tops 4or left intact.` t

The .stitchingof Ith'epil'e warp'threads II to the base Ilnay be accomplished' in any desired'Y manner and by any i-ormiof'stitching. If desired, a single-stitch thread may be employed to pass back and iortht'hrough' the fab-ric and about the threads yI I.` In the specific illustra-tion given, a bottom Ithr'eadflis 'employed onthel underside of the base Ianda stitching 'thread 'I3 is used to extend around thefbottom portions of the loops formed "by threads" 'Il `and to belocked on its underside by thethre'ads'IZ.' The bobbinor through-stitchingfthreads l 3 Varel passed through the base Ill "at regularinte-rvals and theloops formed 'underneath the'fzabri'c are engaged by the shuttle or`locl ing"thread"`l2"soas to secure the stitching threadl Biirmly `in position;

In. the form'of v'stitching illustrated, Vas well as in other forms of stitching, there is a'tendency vfor the` lower 'thread"l2to be drawn upwardly through the base when "great strain is suddenly placed 'upon one oiltheloops forming the warp pile above the base. 'Sometimes the stitching thread I2 breaks,'but often it issimply drawn-upwardlythrough' thebase. Further, the canvas bas'e'lfi,A whichis `corrstantly exposedto a floor and oftento a waxed or'polished iifooigbecoines quite slippery and the rug tends toslipeasily when steppedon'.y

I and that the above difn'cuides een be ova#- c-ome and a very sturdy and stable rug structure produced by providing one, or some, or an occasional under-thread I2 in the rug with a coating or reinforcing composition which will strengthen the thread itself against being pulled through the rug and .against being broken, and which will further provide a fri-ctional or weighted member for holding the rug in place.v The thread I2 may be formed of cotton or any other suitable material and sprayed or drawn through a bath containing a composition adapted to this purpose. For example, as shown in Fig. 3, the thread I2 may be drawn through a bath of latex so as to form a fabric core I4 covered by a resilient coating I5. The latex reinforces the cotton and -provides -a tough sheath I5 resistant to the cutting influences of the upper thread I3. At the same time, the coating I5 is extremely -resistant to the fabric I9 and cannot be drawn through the fabric to release the upper thread I 3. Further, the latex coating provides a tenaceous surface, grips the floor, and maintains the rug frrrnly in position. Even though there are just a few of the threads I2 appearing on lthe underside of the rug, the combined effect of such threads serves to stabilize the rug in its position on the floor.

The treated thread I2 serves a further function in areas like porches, where the wind tends to carry the light rug from its position on the floor. Here the additional weight of the treated thr-eads tends to x the position of the rug.

In Fig. 4 is illustrated a thread having a fibrous core I6 and which is reinforced with a resinous material Il. The resinous material may be of any suitable composition which will reinforce the thread against breaking and against being drawn through the rug and which will, at the same time,

tend to maintain the rug in its position on the floor. For example, resin such as methacrylate, vinyl resins, alkyd and any natural resin, as Well as resin-like materials consisting of cellulose esters or derivatives, and cellulose acetate and cellu lose acetate-butyrate. Such resins not only strengthen the thread but also have thermoplastic characteristics which enable them to be firmly united in the rug and when the rug is formed will, upon setting, tend to lock the stitching threads I3 rmly in place. It Will be understood that there are a variety of resins and resin-like materials which Will permeate the thread Ill or form a coating on the fibrous center thereof while still providing a flexible thread which may be fed through the machine for locking the lower loops of stitching thread I3.

A very attractive and satisfactory rug is formed when the loops of the warp thread II are given an over-twist and then stitched in position upon the fabric III as indicated in Fig. 5, the overu twisted loop being indicated by the numeral I8.

In the operation of the structure, the canvas base I0 which supports the looped pile thread II serves as a secure anchor for the loops by reason of the locking thread I2 which engages the loop lportion of the stitched thread I3 when it comes through the fabric. The coated thread I2 with its latex or resin coating is resistant to tearing and further resists any tension placed upon the thread I3 which might otherwise tend to draw it through the fabric. The latex coating permits a slight yielding under the tension but restores the threads I2 and I3 to their original position after the tensile strain ceases.

It will be understood that instead of employing la locking thread I2 extending all the Way under the fabric, a stitching thread may be employed which will extend through the fabric repeatedly and will serve to lock the pile threads I I to the fabric. Such a stitching thread is preferably formed and treated like thread I2 in the illustration given and serves the same purpose of locking the members II in position, preventing tearing of the threads and also providing means on the bottom side for maintaining the rug in position. While stitching thread I 3 has been described herein as a non-treated thread and thread I2 has been described as the treated thread, it will be understood that such an arrangement may be reversed and that the thread I3, which extends through the fabric, may be treated and thread I2 may be left untreated or, if desired, both threads E2 and I3 may be treated as described herein.

While in the foregoing description, I have set forth many details as illustrating one mode for use of the invention, it will be understood that such details may be Widely varied by those skilled in the art without departing from the spirit of my invention and the claims herein should be looked to as definitive of the scope of the invention.

I claim:

1. A rug, comprising a finished fabric base, pile Warp threads forming loops, and stitching threads `extending through the base and around the lower portions of the loops to secure them to the base, said stitching threads being covered with a resilient material which yields upon the pulling of the loops.

2. A rug, comprising a finished fabric base, pile warp threads aligned thereon in loop formation, and chain-stitching threads securing said loops to said base, the lowermost of said chain-stitching threads extending through said fabric and being coated with a resilient body.

3. A rug, comprising a canvas base, pile Warp threads aligned thereon in loop formation, and chain-stitching threads securing said loops to said base, at least the lowermost of said chain-stitching threads lying on the underside of said fabric and being coated with rubber, said coating producing a yielding of the stitching threads when tensile strain is applied to one of said loops.

WILLIAM F. STAHL.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Great Britain Mar. 13, 1918

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