US1887680A - Bag making machinery - Google Patents

Description

-Nov. 15, 1932.

H. E. HALLMAN BAG MAKING MACHINERY Filed May 8, 1931 5 Sheets-Sheet l m. Rm 0 v e w m# m. M% Y B A ITORNEYS 5 Sheets-Sheet 2 Filed May 8, 1931 INVENTOR Ham/d1. Haw/man. BY

W 9 ATTORNEYS NOV. 15, 1932. LL A 1,887,680

BAG MAKING MACHINERY Filed May 8, 1951 5 Sheets-Sheet 5 INVEN TOR ATTORNEYS Nov. 15, 1932. H. E. HALLMAN BAG MAKING MACHINERY Filed May 8, 1951 5' Sheets-Sheet 4 IN VENT 0R Ham/d E Hal/man. Q/z;

A TTORNEYS Nov. 15, 1932. H. E. HALLMAN I BAG MAKING MACHINERY Filed May 8, 1931 5 Sheets-Sheet 5 INVENTOR I fiaro/dfifial/man.

%: w ATTORNEYS Patented Nov. 15, 1932 UNITED STATES PATENT OFFICE HAROLD E. HALLIAN, OIIORIS'I. mas, m YORK, ABSIGNOB '10 INTERNATIONAL FAPEB COMPANY, OF NEW YORK, N. Y, A oonrom'rrox mew YORK BAG WY Application filed Iay, a, 1031. Sci!!! 10. 535315.

This invention relates tomethods and apparatus for making window bags. By a window bag is meant a bag composed in part of transparent material and in part of relatively opaque material, the latter material being generally'less expensive than the transparent material, and therefore used for purposes of economy.

It is an object of the invention to manu facture window bags from continuous webs of the transparent and relatively opaque materials, such that the transparent panel will extend lengthwise ofthe bag, and preferably for the full length of the front thereof, by a method which may be racticed on substantially standard bag ma ing machinery with a minimum alteration of the machinery.

To this end it is afeature of the invention, in accordance with one way of practicing the same, that ba making machiner is employed adapts toact on a wide we of relatively opaque material to fold the web into a partial tube, and if desired, to form gussets in .the tube? The web is chosen of such width, however, that the margins of the web are not overlapped as usual, but instead 'stand spaced a considerable distance apart, the spacing being controlled to correspond to the desired width of the transparent panel. A separate narrower web of the transparent material is fed into position to overlie the inturned margins of the first web and to bridge the gap between them, and is adhesively united to them. The tube thus made is succesively sevcred into bag blanks, and the manufacture of the blanks into bags is completed in the usual way.

The baa materials preferred are cellophane, which is highly transparent, and glassine, which is relatively opaque. It is not easy to secure quick and dependable adhesion between the cellophane and glassine. There is a t dency of the webs to creep or shift rela- We to each other as an incident of feeding,

and also as an incident of the severing or shearing operation. The as yet imperfect union formed by the moist adhesive has little capacity for resisting this tendency.

It is accordingly a feature of the invention that provision is made both of marginal feed rolls for the broad web and of one or more intermediate pairs of feed rolls adapted to grip both webs positively. Provision is also desirably made of auxiliary presser rolls for hearing through both lwebs in the lines of the adhesive stripes to prevent relative shifting and to iron down the seams. The feed rolls not only assure the drawing of the webs from their respective supply reels in unison, but they also serve to grip and hold both reels positively, without possibility of relative shifting at the severing operation.

' Other objects and advantages will hereinafter appear. r

In thedrawings forming part of this specification:

Figure 1 is a side elevationof a bag making machine on which a bag having the cross section shown in Figure 2 is made;

F igure 2 is a transverse, vertical, sectional view taken on the line 2-2 of Figure 1, look ing in the direction 'of the arrows;

igure 3 is a view similar to Figure 2, but

showing the mechanism modified for forming a bag without gussets;

Figure 4 is a plan view of the machine shown in Figure 1, some of the parts being removed;

Figure 5' is a detail, plan view showing the gumming mechanism of the machineof Figure 1;

Figure 6 is a fragmentary, sectional elevation taken on the line 66 of Figure 1, looking in the direction of the arrows;

Figure 7- is a detail, sectional elevation taken on the line 7-7 of Figure 6, looking in the direction of the arrows;

Figure 8 is a modified form of mechanism similar to that of Figure 1, but designed primarily for use where only a relatively narrow, transparent web is employed; I

Figure 9 is a sectional view taken on the line 99 of Figure 8, looking in the direction of the arrows;

Figure 10 is a view similar to Figure 9, but showing the mechanism modified for making a bag without gussets;

Figure 11 is a view in front elevation of the bag made on the machine of Figure 1 when modified, as shown in Figure 3;

4 lustrated in Figure 10.

Y In the manufacture of the bag illustrated as partially completed in Figure 2, provision is first made of a continuous web 1 of trans parent material such as cellophane and of a continuous web 2 of relatively opaque material, such as glassine. 1

The web 1 is fed to the bag making machine from a reel 4 as illustrated in Figure 1.

This web is fed around guide rolls 5, 6 and 7.: From the roll 7 the transparent Web passes downward beneath a. forming plate 11 which controls the width of the front of the bag. The side portions of the transparent web are turned upward o tside the lateral bounds of the plate 11, eac being guided by a deflector post 12. Folding plates 13 extend inward to overlie the side portions of the plate 11 for forming gussets in the bag, and a further forming plate 14, substantially coextensive in width with the forming plate 11, is mounted above-the plates 13 and in parallelism to said plates and to the plate 11. The plates 11 and 14 are supported at opposite sides of an interposed bar 15. The marginal portions of web 1 are folded in over the plate 14 by folding blades 19, which may be provided, if desired, with the usual guide rollers at their free ends. It will be noted that the upper free margins of the cellophane web 1 are not foldedinto overlapping relation, but that a substantial gap is left between them.

A relatively narrow glassine reel 16 johrnaled upon arms of a standard 17. The narrow glassine web 2 passes downward from the reel around a roller 18. Gumming rollers 8 running in a pot 9 apply gum to the margins of the web 2. The web 2 passes thence beneath a guide rod to feed rollers 20 which are transversely adjustable to engage the margins of the folded web 1 and the middle of the superposed web 2. A continuous feed roller 21 cooperates with the rollers 20 to grip the webs positively. This results in the adhesive union of the margins of the narrow glassineweb 2 with the outer faces of the margins of the cellophane web 1. The rollers 20 "and 21 are located beyond the ends of the plates 13 and 14. The plate 11 is continued past these rollers, however, and at the extremity thereof is provided with a straight saw-toothed edge 22. A block or plate 23 is located above the extremity of the plate 11, and is provided with a con: cave saw-toothed edge 24. A blade 25 is situated at the extremity of the plate 11, and

is intermittently thrust across the path in which the work travels, being caused to sever the face material along the straight sawtoothed edge 23 of the plate 11 and the gusset and back material along the concave sawsegment 30, and thence to a folding and pasting couple comprising cylinders 31 and 32. The cylinder 32 carries a tucking blade 33 and a paste bar 34, while the cylinder 31 carries a folding and gripping jaw 35 and a pasting bed 36. The rotation of these cylinders is timed with relation to the arrival of the bag blanks to tuck and fold over the leading end of the bag blank and paste it against the back of the bag body. The finished bag passes from the cylinders 31 and 32 to a delivery and drying conveyor 37. The combination of the outer feed rolls and the middle feed roll 20 is novel and is an important feature in a mechanism for making window bags. The outer rolls 2O areadjusted to engage the margins of the folded wider web, that is, to engage at or near the side boundaries of the web as folded. While tliese rollers are effective, whenthe narrower web is coextensive in width with a side of the bag, to feed both the transparent and the non-transparent webs, there is a tendency for the narrower'web to buckle or shift, and this tendency is eliminated by the provision of the middle roller 20 which positively grips both Webs at all times. The middle roller 20 performs an important function, moreover, in connection with the severing operation in that it positively grips the narrow web and prevents the pulling of such web away fromthe wider web or shifting of it relative to the wider web even after the severance of the wider web is complete.

In the bag already described the narrow web is substantially coextensive in width with an entire face of the bag, and hence the side rollers 20 act not only as feeding rollers, but also as pressing rollers for perfecting the adhesive union of the'webs. The machine may be employed, however, to make a bag in which the narrow web occupies only a. part of the width of a side of the bag. In such case the side rollers 20 will, as before, be adjusted to run upon the side boundaries of the folded web and will no longer. serve as jpressing rollers for perfecting the adhesive union of the webs. Provision 1s accordlngly made of auxiliary pressing rollers 38 pivotally mounted on arms 39. The arms 39 are mounted on'a transverse shaft 40 and areadapted to be secured -in various positions longitudinally ofthe shaft by set screws 41. The shaft maybe urged in a clockwise direction, 'as seen in Figure 7, by a spring (not shown) to press the rollers 38 toward the roller 21. The arms 39 are so adjusted that p the rollers 38 are caused to bear upon the bag Y in which the wider web is opaque and the narrower web is transparent. If a wide web of glaisine were fed from the reel 4 and a narrow web of cellophane from the reel 16, however, the folding over ofthe bottom end of the bag would necessarily be against the face of the bag, that is, against the side of the bag which includes the cellophane web. This would render the lower end of the bag non-transparent. Since it is considered desirable to have the transparent panel extend clear to thebottom of the bag, a bag so produced would not incorporate all of the most desirable features.

In Figure 8, however, disclosure is made of a slightly modified form of the machine adapted to make a two-piece bag and to fold and paste the bottom end portion of-the bag over against the back of the bag.

In accordance with this method, a wide web of glassine is fed from a reel 4a around guide rolls 5a and 6a. The web passes against folding and forming mechanism which is like the folding and formingmechanism of Figures 1 and 4, but is inverted as compared with Figure 1. Since each element of the folding mechanism of Figure 1 has a counterpart in Figure 8, the same reference numerals-have been applied to coresponding parts with the letter a added. A narrow web of cellophane is fed from a reel 16a beneath the forming plate 14a to lie against the outer faces of the infolded marginal portions of the glassine web and be adhesively united to such marginal portions when passing be tween upper roller 21a and lower rollers a and 38a. The adhesive is applied to the mar- 'ns of thecellophane web by pasting the web etween a roller 18a and gum applying rolls- 8a that run in a pot 9a. The web passes thence around successive guide rollers 10a, the latter a of which has grooves in its surface in register with the adhesive stripes, to avoid smearing of the adhesive onto said roller. The remainder'of the mechanirm is identical with that of Figure 1, and hence requires no detailed description. Corresponding reference the mechanism being numerals have been applied to corresponding parts with the letter (1 added in each instance.

The bag made by the mechanism of Figure 1, when modified as shown in Figure 3, is illustrated in Figures 11 and- 12. This bag comprises a wide sheet C of cellophane having the marginal portions thereof turned in and a narrow sheet G of glassine superposed upon the cellophane sheet and having its margins adhesively united to the inturned margins of the wide sheet. Figure 12 shows the back side of the lower end of the blank from which the bag of Figure 11 is made, the glassine sheet G having a stripe A of adhesive applied to it. The lower extremity of the blank is folded over and pressed against this stripe of adhesive.

Figure 13 illustrates a bag made on the mechanism of Figure 8 as modified in Figure 10, but with the cellophane sheet C nearly as wide as the folded glassine sheet G.

Figure 14 illustrates the bag of Figure 10. In this bag thecellophane sheet C is considerably narrower than the front of the bag. It is in this kind of construction that the rolls 38a are particularly useful.

It willbe appreciated, of course, that in any of the constructions described a composite web might be substituted for the wider web. For example, if it were desired to make a bag like that of Figure 14 but having transparent panels in both the front and back, there would be fed to the machine of Figure 8 a composite web consisting of a central strip of cellophane and side strips of glassinc. This composite web would be dealt with in exactly the same way as the glassine web, but the resulting bag would have aligned transparent panels in the front and back thereof.

I have described what I believe to be the best embodiment of my invention. I do not wish, however, to be confined to the embodiment shown but what I Letters claims.

I claim:

1. A machine for making window bags, comprising a reel for delivering a relatively wide transparent web, a reel for delivering a relatively narrow opaque web, means for folding in the margins of the wider web, and

desire to cover by Patent is set forth in the appended means for feeding the two webs in-unison and adhesively uniting margins of the narrower web with the inturned margins of the wider web, including rollers for engaging the borders of both webs and an intermediate roller gripping and feeding both webs.

2. A machine for making window bags, comprising a reel for delivering a transparent web, a reel, for delivering a relatively opaque web, means for folding in the margins of the wider web, and means for feeding the two webs in unison and adhesively uniting margins of the narrower web with the inwhich comprises a forming plate, folders for turned margins of the wider web, including rollers for engaging the borders of the foldedwider web, an intermediate roller gripping and feeding both webs, and auxiliary pressing rollers for pressing the overlapped margins of the webs and the interposed adhesive together. I

3. A machine for making window bags, comprising reels from which wide and narrow webs are delivered, respectively, a forming plate about which margins of the wider web are turned in, said plate having a wide forming portion, a narrow portion, and an aperture through said narrow portion, means for directing the webs into superposed relation, a web feeding roller bearing against the webs through the aperture in the plate, and additional web feeding and pressing rollers outside the narrow portion of the plate, but wfithin the bounds of the wide portion there- .0

4. Amachine for making window bags, comprising reels from which wide and nar row webs are delivered, respectively, a forming plate about which margins of the wider web are turned in, said plate having a wide forming portion, a narrow portion, and an aperture through said narrow portion, means for directing the webs into superposed relation, a web feeding roller bearing against the webs through the aperture in the plate, and additional web feeding and pressing rollers outside the narrow portion of the plate but within the bounds of the wide portion thereof, said additional rollers being individually adjustable transversely of the direction of web travel.

.5. A" machine for making window bags, comprising reels from which wide and narrow webs are delivered, respectively, means for folding in the margins of the wider web, means for directing the webs into superposed relation to form a tube, means for severing the tube into bag lengths, means for gripping the webs beyond the severing means, and means for gripping the middle and the borders of both webs in advance of the severing means at the severing operation.

6. A machine for making window bags, comprising reels from which wide and narrow webs are delivered, respectively, means for folding in the margins of the wider web, means for directing the webs into superposed relation to form a tube, means for severing the tube into bag lengths, means for gripping the webs beyond the severing means, means ,for gripping the middle and the borders of both webs in advance of the severing means at the severing operation, and means for folding over and pasting an end portion of severed bag blank against the back of the blank to complete the bag.

7. A bag making machine for making window bags from two webs of diiferent'widths,

folding marginal portions of the relatively wide web about the forming plate, means for gumming marginal portions of the relatively narrow web and guiding the same into su= perposed relation to the infolded margins of the wide web to form a tube enclosing the forming plate, the forming plate being con-' tinued beyond the folders and terminating in a severing edge, and tube feeding means disposed between the folders and severing point for advancing the tube to the severing point and gripping it firmly during the severing operation, said forming plate having a. portlon at the feeding means provided with marginal notches and an aperture, and said means comprising three rollers, at one side of the tube for acting respectively through the notches and the aperture, and roller meansat the opposite side of the tubes coacting with the said three rollers through the notches and the aperture to grip the tube at both margins and substantially midway be tween the margins.

8. A bag making machine for making window bags from two webs of different widths, which comprises a forming plate, foldersfor folding marginal portions of the relatively wide web about the forming plate, means for gumming marginal portions of the relatively narrow web and guiding the'same into superposeC relation to the infolded margins of he wide web to form a tube enclosing the forming .plate, the forming plate being continued beyond the folders and terminating in a severing edge, and tube feeding means disposed between thefolders and the severing point for advancing the tube to thesevering point and gripping it firmly during the severing operation, said forming plate having a portion at the feeding means provided with marginal notches and an aperture, and said means comprising three rollers at one side of the tube for acting respectively through the notches and the aperture, a pair of biased,

rollers located intermediate said three rollers on the same side of the tube and disposed to act through said notches, and roller means at the opposite side of the tubes co-acting with the said three rollers through the notches and the aperture to grip the tube at both margins and substantially midway between the margins and co-acting with the said biased rollers through the notches of the forming plate to press the tube seams.

In testimony whereof have affixed my signature to this specificatlon.

HAROLD E. HALLMAN.

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