US2140599A - Envelope forming machine - Google Patents

Description

Dec. 2o, 1938.

L L. SALFISBERG ENVELOPE FORMING MACHINE Filed Sept. 20, 1937 E M M m 5 INVI/VgTOR.

ATTORNEY.

L. L. SALFISBERG ENVELOPE FORMING MACHINE Dec. 2o, 193s.

Filed sept.l 2o, 1957 4 Sheets-Sheet 2 JNVENTOR. vg s yr o ATTORNEY.

Dec. 20, 1938. 1 L. sALFlsBERG ENVELOPE FORMING MACHINE Filed Sept. 20, 1937 4 Sheets-Sheeil 3 AI w h1- lhnl. vl llhl 4 l .II z n L M mi s' ."l

A TTORNEY.

4 Sheets-Sheet 4 A TTORNEY.

IN VEN TOR.

y sas l.. L. SALFISBERG ENVELOPE FORMING MACHINE Filed sept. 2o, 1957 l Dec. 20, 193s,

Patented Dec. 20, 1938 UNITED sTATEs ENVELOPEv FORmN G MACHINE Leroy L. Salfllberg, South Orange, N. J., asslgnor to Wrap-Ade Machine Company, Newark, N. J., a corporation of Delaware Application september zo, 1931, serial No. 164,690

' 3 claims. (cl. :J3-1s) This invention pertains in general to wrapping machines and specifically relates to a construction of mechanism for handling wrapping ma.- terial.

The principal object of the invention consists in providing a wrapping machine having means for producing prepared wrappings.`

Another object of the invention comprises providing apparatus to enable an operator to pull out selected lengths of folded Wrapping material which is severed at a desired length.

A further object of the invention comprises providing a wrapping machine having a reciprocative mechanism for withdrawingA selected lengths of wrapping material from a supply source.

, A still further object consists in producing an arrangement for pulling out selected lengths of wrapping material from a spply source and concomitantly applying seals in the material.

These and other objects will be apparent from the following, reference being made to the accompanying drawings forming a part of the specificativon in which like reference numerals designate corresponding parts, and in which:

Fig. 1 is a plan view of a part of a preferred embodiment of the machine in accordance with the invention, showing the supply reels, and webs of material together with the folding mechanism and a selective adhesive applying arrangement;

Fig. 2 is a longitudinal sectional View taken along the line 2 2 of Fig-1;

Fig. 3 is an elevational view of the apparatus depicted in Figs. 1 and 2;

Fig. 4 is a detailed view of a forming device used in the invention;

Fig. 5 is a plan View of another part of the machine represented in Fig. 6 as an elevational View, partially sectioned;

Fig. 6 is anelevational view partially sectioned along a longitudinal line showing parts of the apparatus not shown in Figs. 1, 2, and 3, and being a continuation of Fig. 2 extending from the line A-A thereof; and

Fig. 7 is a fragmentary cross-section of a guide track arrangement utilizing mechanism .depicted in Figs. 5 and 6.

The invention contemplates the provision of a machine for providing prepared wrappings from a continuous web supply source. In accordance with the invention, one or more Webs of packaging material are fed to mechanism which folds the material and adhesively joins and cuts the same as desired. The machine is adapted to permit selected lengths of the material to be pulled out and severed, the severed material being utilized in Wrapping and packaging processes. The machine is provided with means for automatically transversely sealing the pulled out lengths of material so that envelopes and other sealed packaging-structures can be provided.

Referring to the drawings in detail. a table I is mounted upon an upright support 2 and is provided with parallel upstanding side plates 3 and 4. Mounted between these two side plates are rotatable reels 5 and 6. Rolls of web material land 8 are mounted onvthe reels'5 and 6 respectively. The materials 'l and 8 may be of various compositions. In the present embodiment, the material 8 comprises a. web of transparent material such as regenerated cellulose with a thermo-setting coating contained thereon. The material 'l comprises a web of soft cardboard somewhat less ln width than the width of the material 8. The reels 5 and 6 are transversely adjustable so that the webs 'l and 8 can be positioned in different overlying relations.

The material 8 is fed around rollers 9-12 so that lines of adhesive can be applied to the top side of the material 8. The adhesive applying arrangement comprises a pair of gluing devices I4 and I5 including pots I4 and l5 adjustably suspended from a transverse rod I6 mounted between the plates 3 and 4. 'I'he pots I4 and l5 contain glue and include rollers which dip in the contained glue and apply lines of adhesive I8 and I9 along the web of material 8.

l The two webs 'l and 8 are brought together over roller 20 and thence, in the operation of the machine, are fed together to and from a forming device 23. The forming device 23 comprises a transverse bar 24 suspended from uprights 25 and 26 which depend 4from a transverse bar 2l mounted between plates 3 and 4. The uprights 25 and 26 have hook members adjustably supported by the top of the bar 2l and are provided with setscrews so that the b ar 24 can be easily removed and replaced with a bar of diiferent width to form wrappings of different dimensions. The bar 24 is suspended a slight distance 30 from the surface of the table l and includes sharp prism shaped corners 3| and 32. In addition to the foregoing, a roller 33 is rotatably mounted between mounting members 34 and 35 which are adjustably suspended from the bar 2l as shown in Figs. 2 and 3.

Referring to Figs. 1 and 2, the edges 8a and 8b of the web 8, respectively extending upon opposite sides of the web 1, and accommodating the glue lines I8 and I9, are brought around the edges of the web 1 to pass beneath guide members 40 and 4| adjustably secured to the table l upon opposite sides of the webs.

Referring to Fig. 2, it will be seen that the webs l and 8, after passing the roller 2D are fed toward the surface of the table l in a direction substantially perpendicular thereto and, after passing around the forming bar 24', pass substantially parallel to the surface of the table l,

thus forming an approximation of a right angle in passing to and from the forming device. The united webs, with the edges of the web 8 folded over the web 1; form a composite web which is now fed for further operations in the making of prepared wrappings.

Referring to Figs. 5 and 6, the composite web 1 8 is fed over roller 50 between two upright plates 5I and 52. A transverse ejector rod 53 is slidably mounted in slots 54 and 55 in the plates 5| and 52. The weight of the rod 53 causes the same to rest in a depression 56 of horizontal plate 51 mounted on the surface of table l and extending between the plates 5l and 52.

The composite web structure 1-8 passes beneath the roller 53 and over a hardened cutting plate 58, secured to the plate 51. The plate 58 has a perpendicular front edge engaged by a hardened roller 59 mounted upon a carriage 60 riding upon transverse rods 6i and 62. The carriage 60 has a manual knob 64 and is adapted to move the roller 59 back and forth across the front edge of the plate 58 to produce a shearing action for transversely severing the composite web 1--8. When the composite web 1-8 is thus severed, the end is distendcd away from the plate 58 as represented by dotted line 65 in Fig. 6. The distended end 65 may be grasped in a repeat operation to pull out a further section of the composite web 1 8.

'I'he table i is provided with a sub-table 10 which slopes slightly with respect to the horizontal surface of the table I. The sub-table 18 is provided with a longitudinally extending track 1l in which rider members 12 and 13 form part of a carriage 1Q. The carriage 14 includes a front transverse gripping jaw 15. The gripping jaw 15 consists of a metallic bar having an upper serrated surface and an internal electrical heating element 16.

Another transverse gripping jaw member 11 is mounted on side arms 18 and 19, which are pivoted to the carriage 14 so that the jaw member 11 may come into gripping engagement with the bar 15. The jaw 11 also comprises a metal bar having a serrated surface adapted to mesh the serrated surface of the bar 15. The members 18 and 19 are mounted upon a shaft 80, journalled transversely in the carriage 14 and centrally provided with a lever 8|. The lever 8i is connected with a tension spring 82 secured to a rear part of the carriage 16 for normally maintaining the bar 11 in an extended upward position away from bar 15. The members 18 and 19 are adapted to be engaged by cam members 85 and 86 mounted upon a shaft 81, journalled transversely in the carriage 16. The shaft 81 has Y,keyed thereon a handle 89 having a transverse manual pulling member 99. The member 9i) is normally maintained in an upward extended position as shown in the left hand part of Fig. 6, by virtue of the tension spring 88, a stop member 9| mounted on the shaft 81 limiting the movement of the handle 89 through contact with the pin member 92.

The electrical heat element 16 in bar 15 has electrical connections in a flexible cable 94 protruding from a conduit 93 and extending rearwardly of the table 18 to a take-up device 95. The take-'up device 95 includes a casing containing a spring driven reel for automatically coiling the cable 9d except for the parts thereof withdrawn by movement of carriage 14'. The other end of the coiled cable 94 is connected with suitable electrical supply terminals.

In the operation of the machine, the member is manually grasped and moved in the direction of the arrow 91 in Fig. 6 to a limiting position, as represented in dotted lines in Fig: 6. In this limiting position, the jaw members grasp the distended end of composite web 1-8 and the handle 1 I, whereupon the webs are pulled from the supply source past the forming device 23. The carriage 1d may be moved any desired distance, such as determined by the adjustable stop member 99, whereupon the member 90 is released and the knob 64 transversely actuated to sever the composite web. During the pull out movement of the composite web 1-8, the two webs will have been longit-udinally united by overlapping of the edges 8a and 8b and will have been transversely sealed together by the pressure-heat action of the gripping jaw members 15 and 11. When desired, the reciprocative cutting roller 59 may be actuated by foot levers, for example, as shown in my United States Patent No. 2,054,523, issued September l5, 1936 and entitled Universal wrapping machine. r

It will be seen that the present invention provides for the economical and efficient production of prepared wrappings such as laundry shirt envelopes, and other packaging structures. A1- though a preferred form of apparatus has been disclosed, it will be recognized that various changes and equivalent structures can be made without departing from the intended scope of the invention.l Therefore, no limitation is intended except as pointed out in the appended claims.

What is claimed as new and original to be secured by Letters Patent of the United States is as follows:

1. A machine for supplying prepared Wrappings which comprises, means for supplying a plurality of web layers of packaging material, forming means for folding the edges of one layer around the edges of. another, means for pulling the composite layers past said last-mentioned means and including a reciprocatively operated gripping device.

2. A machine for producing prepared wrappings comprising, a supply means for feeding web packaging material in opposed layers, means for pulling out'selected lengths of said material including a gripping device for gripping said material and moving the gripped material from one position to another, said gripping device including means for applying heat and pressure to the opposed layers of said Webbed material to seal said layers together.

3. A machine for supplying prepared wrappings comprising, means for supplying different width webs of packaging material, a forming device positioned transversely of said webs, means for guiding said Webs in a superimposed condition to and from said forming device with the edges of the wider web folded around the edges of the narrower web, means for applying a line of adhesive to the edges of said wider web before being folded, means for severing selected lengths of the composite web structure, a pull-out device heling jaws for gripping a severed end of said composite web structure to move the same a selected distance and having means for heat sealing said gripped ends of said composite structure to form a transverse seal therein.

LEROY L. SALFISBERG.

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