US2217494A - Method of making coupon receptacles with closure locks - Google Patents

Description

Oct. 8, 1940. I w PQPPE v 2,217,494

METHOD OF MAKING COUPON RECEPTACLES WITH CLOSURE LOCKS 4 Sheets-Sheet 1 Gzarye 7 0" c. 19%, m. 19,116,

fiflovuay Oct. 8, 1940. w; PQPPE 2,217,494

METHOD OF MAKING COUPON RECEPTABLES WITH CLOSURE LOCKS Original Filed Aug. 27, 1938 4 Sheets-Sheet 2 eozyew ohhe.

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0d. 8, 1940. w PQPPE 2,217,494

METHOD OF MAKING COUPORQECEPTACLES WITH CLOSURE LOCKS Original Filed Au 27, 1958 4 Sheets-Sheet s I HI I \R Geor e W. Po

G. W. POPPE METHOD OF MAKING COUPON BECEPTACLES WITH CLOSURE LOCKS Original Filed Aug. 27, 1938 4 Shasta-Sheet 4 Patented Oct. 8, 1940 UNITED STATES PATENT OFFICE METHOD OF MAKING CGUPON RECEPTA- CLES WITH CLOSURE LOCKS George W. PoDpe, Brooklyn, N. Y., assignor to Equitable Paper Bag 60. Inc., Brooklyn, a corporation of New York Reiiled for abandoned application Serial No.

227,038, August 27,

1938. This application February 29, 1940,. Serial No. 321,450

5 Claims.

This invention relates to a method of producing a receptacle having a closing flap which may be locked to the walls of the receptacle on being folded over onto such walls or within the same and more particularly to a coupon receptacle in which two flaps are provided at the mouth thereof with the locking elements in the closure flap and in the receptacle walls, said locking elements being so positioned that after the coupon has been detached, the locking elements in the flap and in the receptacle walls may be brought into operative relation with each other.

In my Patent 2,009,411, dated July 30, 1935, I have shown several types of locking closures for receptacles, the locking elements of which include a pair of spaced parallel cuts and cooperating locking tongues.

One of the objects of the present invention is the production of, such a locking closure by a method adapted to be commercially practiced on a bag machine without waste of paper.

A further object of the invention is the production'of a coupon bag having two flaps at the mouth thereof, one of said flaps being detachable to serve as a coupon or receipt or be filed as a record and the other flap adapted to be folded over either inside or outside of the bag, the folded-over flap being provided with a locking element cooperating with another locking element in the bag walls whereby the flap in its folded-over position may be locked to said walls.

In the drawings- Figure 1 is a longitudinal section with the central portion broken away, of a bag machine of well known construction with additions and modifications necessary in the practice of my method;

Figure 2 is a more or less diagrammatic plan view showing the steps in one mode of procedure in the making of a lock coupon receptacle on a machine of the type shown in Figure 1;

Figure 3 is a view showing a bag section after it has been severed from the main tube but before the bottom has been folded;

Figure 4 is the reverse of Figure 3 with the bottom folded and the coupon detached;

Figure 5 is a perspective view of the upper portion of the finished bag with the detachable coupon partly severed and showing the locking elements in the undetached coupon and in the bag walls;

Figure 6 is a more or less diagrammatic plan view showing a slightly diil'erent method of producing a bag tube section than that shown in Figure 2;

Figure 7 is a detail of the upper portion of the machine shown in Figure l but modified to conform to the method of procedure illustrated in Figure-6;

Figure 8 is an elevation and part sectional view along the line 88 of Figure 7; v

Figure 9 is a perspective view of the finished bag made in accordance with the method particularly illustrated in Figure 6;

Figure 10 is a longitudinal section of a bag machine somewhat similar to that shown in Figure 1 but modified to practice the method in a somewhat different way from that shown in Figures 2 and 6;

Figure 11 is a more or less diagrammatic plan view showing the manner ofhandling the web and tube on the machine shown in Figure 10; and

Figure 12 is aperspective view of the upper portion of a bag made according to the method disclosed in Figures 10 and 11.

Referring to Figures 1 and 2, there is a supporting framework 2, the side members of which carry various shafts for driving the usual mechanism of a bag machine. The shaft 4,

Figure 1, may be driven by any suitable means and this shaft furnishes power 'for the rest of the machine. Since machines of this general type have been in use for a long time, and the details of its operation described in a number of my previous patents, it will be necessary here merely to outline its general construction and mode of operation.

.The shaft 4 through suitable means drives a belt or chain 6 and through it the shaft 8 is driven. The latter shaft carries the gear 9 shown in dotted outline only, which meshes with a similar gear i0 mounted on shaft II. The latter shaft carries a sprocket l2 for driving a chain it engaging another sprocket on shaft ill at its upper rear portion of the machine. The paper is fed as a web ill from a roll l9 supported on a shaft 20 at the lower right hand portion of the machine, as shown in-Figure 1. The web passes over a guide roller 2| and around an impression roller 22 where the web receives a line of perforations 23, Figure 2, this line of perforations being formed within the margins of the web as there shown. Preferably the perforations are made by a blade Zlsupported by a roller 26 on the shaft 8. The various shafts 4, 8 and it each make one rotation for every bag section produced and therefore the perforations 23 are spaced atv bag section intervals apart in the longitudinal direction of the web. These perforations form the base of a. detachable coupon in the finished bag as will be pointed out more in detail hereinafter.

The roller 26 may also carry printing means whereby suitable identifying marks may be printed on the web at such positions that such marks will appear on the detachable coupon and one or both walls of the finished bag. The web after being perforated, passes over a guide roller 26 and around another roller 36 which reverses its direction of movement. As it passes about the roller 30 paste is applied to the web. It may be applied as a single line of paste as shown in Figure 6 or as three separate lines as shown in Figure 2.

In the Figure 2 form which the invention may take, three parallel lines of paste are applied in order that the locking elements, subsequently to be described, may be reenforced bya double thickness of paper. plied as a single line or three lines, a roller 32, Figure 1, is utilized. This roller dips into a paste pot 33.

The shaft i6 has mounted thereon two blocks 34, each carrying a die 35, which dies make parallel longitudinal cuts 36 in the web of paper as it passes over the roller 30, which roller is preferably of hardened steel. The blocks 34 are adjustable along the shaft IS in order that the dies may be differently spaced for bags of different widths. The spacing, as shown, is such that the parallel longitudinal cuts 36 are spaced apart a distance substantially equal to the length of th line of perforations 23 and meet said line. The mounting of the block 34 is more clearly shown in Figure 8 and in so far as the present description has progressed, the construction for carrying out the method illustrated in Figures 2 and 6 is the same except that in Figure 6 method a single line of paste only is applied to the margin of the web.

In the method disclosed in Figure 2,in addition to the blocks 34, there are also provided two additional blocks 38 on either side of the blocks 34. These latter blocks are each provided with a die 40 for forming one element of the locking devices. These locking devices consist of a pair of spaced parallel cuts or slits and cooperating locking tongues and either element of these locking devices or both may be formed in the web. As disclosed in Figure 2, however, .the dies 40 make the two short parallel cuts in the web which cuts are located laterally in respect of the cuts 36. The die 40 carried by the block 38, at the right hand portion of Figure 2, is so located on the shaft 16 that the short parallel cuts are made on either side of the central line of paste. In practice the paste line would be comparatively narrow and the cuts on either side would be sufficiently spaced from the paste line so that the dies would not be smeared by the paste during the cutting operation.

The cuts made by the left hand die 40 are spaced within the left hand margin of the web and are so located that when the web is folded to form the tube, the cuts at each margin will register with each other so as to form in effect two parallel cuts substantially in the center of the seam wall of the tube. The cuts thus in register are indicated by the reference character 4| in Figures 3 to 5. v

The folding of the web into a tube is brought about as is usual in bag machines, by passing the web under a former indicated at 42, Figure 1, the free edges of the web being folded over onto Whether the paste is apthe former and pasted along the overlapped edges, forming a seam. The former is supported, as usual, from a cross bar 43, from which depends a bracket 44 carried by arms 46 extending forwardly and upwardly from the machine frame.

The web and tube are continuously advanced by means of an upper feed roller 41 and a lower feed roller 46, the upper roller 41 being adjustable to vary the pressure of the rollers against the tube. The rollers are driven as usual by a connection (not shown) from the shaft 4, the ratioof gearing being such that the feed rollers advance the tube a bag section as the shaft 4 .rotates once for each bag tube section. The tube is folded over the former in such a way that the cuts 36 are in. the line of fold and consequently are at the edge of the tube and will constitute the side edges of two flaps in the finished bag after the tube has been severed.

This severing mechanism causes both walls of the tube to be severed along lines which meet one end of each of the cuts 36. A bag tube section thus severed is shown near the bottom of Figure 2 and on an enlarged scale in Figure 3. The bottommost section in Figure 2 shows the completed bag after the bottom has been folded over onto the seam wall. Before this final bottoming is effected, however, the severed tube section is acted upon by mechanism which causes the other elements of the locking device, namely the locking tongues, to be formed in both walls thereof, which locking tongues are so located and their bases so separated that they may be passed through the cuts 4|. The segmental cuts forming the locking tongues are also in the seam of the tube and the segmental portions are on either side of the central paste line as clearly shown in the lower portion of Figure 2.

Before describing the mechanism whereby the locking tongues are produced in the two walls, it will be in order to describe briefly the severing mechanism.

The edge of the former forward of the feed rollers is provided with a serrated edge indicated at 50, Figure 1. Situated Just above the former is the lip knife 52 which as shown in Figure 2, has a slightly concave form; The edge of the former, as is usual in machines of this type, severs the lower or plain tube wall while the lip knife severs the upper or seam wall of the tube, the lines of severance meeting at the side edges of the tube and at one end only of each of the parallel longitudinal cuts 36. The actual severance is brought about by a bar-54 known in the art as a striker bar, which is carried by a sprocket chain 55, Figure 1, driven by sprockets 56 and supported on shafts 5B and 59. The lower shaft 58 is driven from the shaft 4 by suitable gearing including the idler 60 in order that the motion of the sprocket chain and consequently the striker bar or bars, may be in the proper direction to sever the tube from beneath. In a commercial machine, two striker bars 54 are usually provided.

It is also usual in machines of this type to create some slack at the time of severance and this is brought about by means of the so-called pinch bar 62 which bar is in effect a cylinder having a segmental portion of slightly greater radius than the rest of the bar. This segmental portion extends circumferentially only a short distance but suflicient to retard the motion of the tube momentarily in order that the desired slack may be created thereby enabling the striker bar to sever the tube against the serrated edges of the former and lip knife. Since the pinch bar rotates once for each bag section produced, the necessary retardation is brought about by reason of the fact that its surface speed is slower than the surface speed of the feed rollers 41 and 48. In Figure 1 the walls of the tube are shown as being in engagement with and ready to be severed by the formerand lip knife.

The locking tongues are produced in the tube section, after the tube is severed. For this purpose the leading end of the severed section is gripped by the edge of a segmental roller 63 carried by shaft 64 supported in a frame 65, which by means of the rack 66 and pinion 61 may be adjusted towards or from the pinch bar mechanism. The shaft 68 also supported in the frame 65 carries a roller 69 preferably of hardened steel and the segmental roller 63 carries a die 10 so shaped as to form the segmental cuts outlining the locking tongues H, Figure 5. The segmental roller 83 and the hardened roller 89 are geared to rotate together in a one-to-one ratio. This gearing is not shown in Figure 1, but its construction will readily be understood. Connections by which the two rollers are driven from the shaft '3 is brought about by an idler 12 engaging a similar gear on the shaft 4 and a gear on the shaft 58 whereby the direction of rotation of the roller 63 is the same as that of the pinch bar 62, that is clockwise.

After the tube section has been acted upon by the die 10, the bag section passes on to the cylinders 14 and 15. The cylinder l5 carries a tucker blade 16 and a paste applying bar 11 receiving paste from the paste pot l8. The lower cylinder 15 carries the usual clamp into which the bag bottom is thrust by the tucker blade 16 to fold the bottom of the severed section along the line H, Figure 3, to thereby form the completed bag, one side of which is shown in Figure 4 and the reverse side of which is shown at the bottom in Figure 2.

In the completed article, therefore, two flaps are produced at the bag mouth, the fiap 19, Figure 5, being a continuation (if the plain tube wall and the flap 8| a continuation of the seam wall. The line of perforations 23 is at the base ofthe fiap 19 which constitutes the detachable coupon. The seam fiap 8| contains the cuts 4|, The locking tongues are cut in both bag walls and when the coupon 19 is'detached, the undetached flap may be folded over onto the plain wall of the bag and the locking tongues ll may be snapped through the slits ii to lock the flap to the bag walls. The flap of course, may be folded inside of the bag and the locking also be effected.

In the method as practiced according to the showing in Figures 6, 7 and 8, both elements of the locking devices are formed in the web. In order that this may be accomplished, the blocks 38, which in the Figure 2 arrangement carry only the dies 40, in the arrangement shown in Figures 6 and 8, one only of the blocks 38, namely the one at the right in Figure 8, carries the dies 40 while the other block 38 which is located between the blocks 34 carries the die so shaped as to make the segmental cuts in the web by which the locking tongues are formed when the web is folded. These latter dies are indicated by thereference character 80, Figure 8. Therefore, as the web passes over the roller 30 it receives the cuts made by the die 40 and the segmental cuts made by the dies 80, in addition to the parallel cuts 36 made by the dies 35. In this form of the invention, the seam formed by folding the tube over the former is offset as clearly shown in Figure 6, with the short cuts in one wall only and the segmental cuts in both walls of the folded tube. The tube is severed, as previously described, bythe lip knife and former along lines which meet one end only of the longitudinal -parallel cuts 36. In the method as illustrated in Figure 6, the severed tube passes directly from the pinch bar mechanism to the bottom forming mechanism.

The finished bag shown in Figure 9 resembles Figure 5 in that the detachable coupon does not contain either element of the locking devices but the undetached flap and the walls of .the bag contain these complementary elements.

Figure 9, however, differs from Figure 5 in that neither of the locking elements is in the seam.

In the method so far described, either of the elements constituting the locking devices maybe made in the web prior to folding the same into a tube. In such case the othere elements of the locking device would be made in the tube. When both elements of the locking device are made in the web as shown in Figure 6, there is no need for any further action on the tube.

In Figures 10 and 11, I have shown. a form in which the locking elements are both made in the tube section after severance. In Figure l0, so much of the machine is shown as will serve to illustrate this method of procedure. The parts described in connection with Figure 1 whereby the web receives the line of perforations 23,

Figure 11, and the parallel longitudinal cuts 36, is the same in Figure 10. However, this is all of the cutting that is done in the web as the same passes over the roller 30. The web then passes under the former and is folded over onto the seam to form atube being continuously advanced by the feed rollers 41 and 48 as previously described. The tube is then severed against the serrated edge of the former and lip knife by the action of the pinch bar mechanism and the striker bar 54. From the pinch bar mechanism the tube is gripped between'a segmental roller 82 and a hardened steel roller 84 which rollers are driven from the shaft 4 as previously described. The roller 84 and the roller 89 are of the same character. ever, from the roller 63 merely in the smaller extent of its cut-out portion, enabling it to accommodate two dies, namely the die 85 and the die 86, the die 8'5 being constructed exactly like the die I0 and the die 86 being substantially similar to oneof the dies 40. Since these dies act upon a tube section, they cut through both walls of said section and therefore in the finished It is also to be understood that the dies as and 86 are so mounted in the roller 82 asto be circumferentially adjusted thereabout, and of course either die may occupy the position of the other so that instead of the short parallel cuts appearing in the flaps as shown in Figure 12, they would appear in the bag walls. Conversely the segmental cuts forming the tongues would appear in the flaps.

The roller 83 differs, how- Various modifications may be resorted to within the .scope of the invention without departing from the spirit thereof.

This application is refiled for abandoned application Serial No. 227,038, filed August 27, 1938.

What I claim is:

l. The method of producing a receptacle with locking elements in the closure flap and in the receptacle walls; which includes making parallel outs in a web of paper within the margin but near one edge thereof, said cuts constituting one of the locking elements, folding the web to form a tube with the cuts in one wall only thereof, so severing the tube that one wall projects beyond the other wall at one end of a severed section to form a closure flap at the mouth thereof with the cuts within the top edge of the flap, and subsequently making cuts in the tube walls constituting the other one of said locking elements, said cuts forming tongues which are adapted to be passed through said parallel cuts in the flap when the latter is in folded-over position,

2. The method of producing a coupon flap receptacle with looking elements; which includes forming a line of perforations in a web of paper within the margin thereof, making longitudinal parallel cuts spaced apart a distance substantially equal to the length of said line of perforations and meeting such line, making parallel relatively short cuts in the web located laterally in respect of said longitudinal parallel cuts, folding the 'web to form a tube with the first mentioned parallel cuts in the lines of fold, severing the tube along different lines so that one Wall is longer than the other at one end of a severed section, the lines of severance meeting the side edges of the tube at one and only of the first mentioned parallel cuts to produce two flaps at one end of a severed section with the longitudinal cuts forming the side edges of said flaps, one flap containing the relatively short cuts constituting locking elements and the other flap having the line of perforations at its base whereby it may readily be detached.

3. The method of producing a coupon flap receptacle with locking elements; which includes forming a line of perforations in a web of paper within the margin thereof, making longitudinal parallel cuts spaced apart a distance substantially equal to the length of said line of perforations and meeting such line, making parallel relatively short cuts in the web located laterally in respect of said longitudinal parallel cuts, folding the web with the longitudinal cuts in the line of fold to form a tube, severing the tube along lines which meet one end of each of said longitudinal cuts thereby producing two flaps at one end of, the severed section, one of said flaps containing the relatively short cuts constituting locking elements and the other having the line of perforations at its base whereby it may readily be severed.

4. The method of producing a coupon flap receptacle with locking elements; which includes forming a line of perforations in a web of paper within the margin thereof, making longitudinal parallel cuts spaced apart a distance substantially equal to the length of said line of perforations and meeting such line, making parallel relatively short cuts in the web located laterally in respect of said longitudinal parallel cuts, folding the web to form a tube and severing the tube along lines which meet one end of each of said longitudinal cuts and subsequently producing oppositely facing tongues in the tube walls, the base of the tongues being separated a distance substantially equal to the distance separating the relatively short cuts.

5. The method of producing a coupon flap receptacle with locking elements; which includes forming a line of perforations in a web of paper within the margin thereof, making longitudinal parallel cuts spaced apart a distance substantially equal to the length of said line of perforations and meeting such line, making parallel relatively short cuts in the web located laterally in respect of said longitudinal parallel cuts, folding the web to form a tube and severing the tube along lines which meet one end of each of said parallel longitudinal cuts to thereby form two flaps at the end of a bag tube section, one of said flaps containing the relatively short cuts and the other having a line of perforations at its base, and subsequently producing oppositely facing tongues in the tube walls, the base of the tongues being separated a distance substantially equal to the distance separating the relatively

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