US2610595A - Industrial bag stringing machine - Google Patents

Description

Sept. 16, 1952 EL'WEST 2,610,595

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Sept. 16, 1952 E. E.wEsT 2,610,595 INDUSTRI AL BAG STRINGING MACHINE I Filed May 15, 1948 17 Sheets-Sheet 17 QM 'WLM MUN-Q HTTOA EKS'.

Patented Sept. 16, 1952 UNITED. s ATEs QFFICE I The present invention relates to, an. improved machine. for making and stringing bags.

The principal object of the invention is the provision of an improved machine for printing and automatically hemming a continuous web. of cloth, forming notches in the hemmed edge, feeding a string into, the hem during the final hemming thereof, after which the notched and hemmed web is severed into ba lengths of a predetermined, size, and folded into bag blanks which are positioned on a stacker preparatory tobeing stitched into a completed bag. f

Another object is to provide a novel rotating notcher for forming V-shaped notches o1 openings in a continuous travelling web of cloth.

A further object is to provide a novel hemming and string inserting mechanism for simultaneously hemming and inserting a string in the hemmed edge of the travelling web of cloth either'hefore or after the same has been notched.

Still another object is the provision of a novel cutter for transversely cutting the notched, hemmed; and strung web of cloth into bag lengths and also cuttingv the string so that the ends of the latter will project, through the notches or openings in the hem.

A still further object is to provide an improved means associated with the cutter and working in timed relation therewith for folding the bag lengths transversely into bag blanks and positioning the same on a conveyor.

Another object is the provision of a novel conveyor mechanism for delivering the folded bag blanks and depositing the same on a novel oscillating stacking device which moves at the same speed as the conveyor to assure of the bags being uniformly stacked thereon.

These and other objects and advantages will be apparent as the specification is considered with the accompanying drawings wherein:

Figure 1 is a side elevation viewing one side of the machine;

Figure 2 is a side elevation viewing the other or opposite side of the machine;

Figure 8. is a. plan view oi the complete machine;

Figurefia, is a plan. view of the complete machine with the, notching mechanism mounted intermediate the sewing machine and web cut tin roll;

Figure 4 is a view of one end of the machine;

Figure 5; is a view of the opposite end of the machine to that shown in Fi ure 4; v

Figure 6 is a section on the line 5-6 of Fig ure 3;

, 2 Claims. (Gl.112-2)" Figure 6a is, a section on the line td -ea of Fi ure 3;

Figure 7' is a section on the line 1--.i of Figure. 1;

Figure 8 is a section on the line 8i3' of Figure 1;

Figure 9 is a section on the line 9-43 of Figure 1; v

Figure 10 is a top plan view of the folder or hemmer;

Figure 11 is an end View of the hemmer;

Figure 12 is a front elevation of the. hemmer;

Figure 13 is a view looking toward the opposite end of the hemmer shown in Figure 11 Figure 14 is a section on the line l e -iii of Figure 12; t

Figure 15 is a section on the line l5--l 5 of Fig ure 12; v

Figure 16 is a section on the line [3-[6 oi 22-22 of. Figure 18;v

Figure 23 is a section on the line 23-Z3 of Fig ure 22;. p

Figure 24 is a section on the line 24-25, of

Figure 22;

' Figure 25 is a section on the line 2-25 of Figure 17; Y

Figure 26 is a section on line, 2-826 of Figure 19;

Figure 27 is a detail view of the bag length folding mechanism;

Figure 28 is a section on line 28-28 of Figure 27;

Figure 29 is a section on line 2929 of Figure 27; v

Figure 30 is a perspective View of the cutter roll;

Figure 31 is a bottom plan view of the cutter roll;

Figure 32 is a section on the line Cub-.32 of Figure 30; V

Figure 33 is a section on line 33-45% of Figure 31;

Figure 34 is a perspective view of the folding bar;

Figure 35 is a fragmentary plan view of the bag blank;

Figure 36 is a view of one of the bags after it has been cut and folded; and

Figure 37 is a section on line ill-31 of Figure 5.

In order to better understand the many features, advantages and mode of operation of this machine, it is believed that it will be well to briefly describe how this machine functions. Thus, a web of cloth is drawn from a roll and successively passed through tensioning rollers and printing rolls for printing a suitable design on the cloth, after which the travelling web is passed over a folding bar for folding or rolling one edge thereof. A rotary cutter is then caused to act upon and form notches in the partially formed hem to provide openings through which the draw strings will project after the strip of cloth has been severed into bag blanks. The rolled edge of the web is next acted upon by a combined hem folder and string feeder whereby the side hem is completely and uniformly formed and a draw string laid longitudinally therein whereupon a sewing head stitches the hem. In the next operation, the hemmed and strung web is cut transversely, and folded into bag blanks which are delivered into a stacker where the same are uniformly stacked in bundles of a predetermined number of bag'blanks preparatory to being sewed into completely formed bags by another sewing mechanism which does not form a part of the present invention.

Referring more particularly to the drawings wherein like reference characters designate like parts throughout the several views the numeral I represents a suitable main frame of metal or the like consisting of uprights 2, mounted on a base 3, and cross bars 4 on the upper end thereof. Cloth is drawn from a supply roll 5, suitably journalled in bracket arms 6 on the front of the frame I, and is passed over an idler roll 8 journalled in the upper end of a feeding mechanism frame I mounted on the main frame I at the front end thereof. The cloth is then passed over a small driven feed and pressing roller 9 journalled in the ends of bracket arms I I mounted on an idler roller shaft 10 mounted in the frame I. After passing around the roller 9, the cloth is caused to pass over and under a larger feed and pressing roller [2, also journalled in feed frame I, which roller [2 coacts with a conventional driven printing cylinder i3 forming a part of the first of two printing mechanisms 20 and 20'. The printing cylinder [3 is journalled in the frame which is supplied with ink in the usual man ner by inking rolls l4 and i arranged in an ink trough I6 mounted on the frame. The printing cylinder l3 inking rolls l4 and I5, large and small feeding roller [2 and 9 are geared together by meshing gears I! and, as the printing cylnder i3 is provided with a sprocket 18 which is driven by a chain I9 coupled with the main drive presently referred to, the feed rollers and printing mechanism are simultaneously driven for feeding and printing the web of cloth. The second printing mechanism 20, corresponding to the first mechanism, is also mounted in the frame I to enable the cloth to be printed in two colors, if so desired. A

The cloth supply roll 5 'is adapted to be raised and lowered to facilitate assembly and disassembly thereof by virtue of the supporting bracket arms 6 being pivotally mounted, as at 2|, on the main frame I. The outer ends of the arms 4 6 are connected by rods or straps 22 with chains 23 which travel over sprockets 24 carried by the idler roll 8, and the chains are connected by coil springs 25 anchored on the main frame I. A pawl 26 engages with the teeth of a ratchet wheel 21 formed on the shaft of the idler roll 8 so that, upon disengagement of the pawl 26, the shaft and sprockets 24 and may be rotated in the appropriate direction by a crank arm 28 to raise and lower the supply roll in an obvious manner. Tension is applied to the supply roll 5 by any suitable means, such as a cloth strip 29 which is attached at its upper end to the feeding frame i and is provided at its free lower end with suitable weights 3!]. The supply roll is also adapted to be adjustable laterally to enable the side edge of the web of cloth which is folded to be corre- 'spondingly adjusted for regulating the width of the hem formed thereon. In the mechanism herein illustrated, such an adjustment may be effected by journalling one end of the supply roll shaft in a block 31 (Figures 3 and '7) which is slidably mounted on pins 32 arranged on the outer end of one of the bracket arms 6. A disc actuated rod 33 is journalled in the bracket arm 6 and threadedly engages with the block 31 so that rotation of the disc causes the block 3| and supply roll shaft to be moved relative to the bracket arm in an obvious manner to effect the adjustment hereinabove referred to. However, it will be understoodthat other means may be employed to bring-about such an adjustment of the cloth. l After the web of cloth has passed through the feeding and printing rollers just described, one side edge thereof engages with one end 35 of a folding rod 34. v By reference to Figure 34 it will be noted that an upwardly and laterally extending offset 36 is formed on one end of the folding rod 34 adjacent the end 35 thereof. The outer end of the offset 36 and the opposing end of the foldin rod 34 are fixed in blocks 31 which are adjustably mounted on vertical osts 38 on the main frame I. It will thus be seen that the end 35 of the rod 34 is spaced below the oifset- 36 and in effect constitutes an extension of the folding rod. As the cloth passes beneath the folding rod 34, it will be smoothedto remove any wrinkles or folds therefrom and the extended end 35 thereof, will cause the side edge of the cloth to be curled or rolled upwardly and inwardly, as best shown in Figure 3. Upon passing the end 35 of the rod 34, the rolled edge of. the cloth passes through the bent end 43 of a wire 39 (Figure 3) suitably supported by the frame I which has a tendency to flatten or complete the curling or rolling of the edge thereof.

As the edge of the cloth has been rolled or formed into a hem, it is now necessary to form notches or openings in the hemmed edge, prior to the insertion of the string therein and the sewing or stitching operation, so that there will be a gap or opening through which the string will extend. Heretofore,'hemming devices of this general type, for example, those shown in my Patents Nos. 1,920,822 and 1,920,823, issued August 1', 1933, haveemployed slotters or cutters which form longitudinal slots in the hemmed edge, but these devices have provided unsatisface tory due to the difliculties encountered by the machine operators inpulling the Strings through such slots. For these and other reasons, it is desirable to employ a rotary cutter which will form a. substantially V-shaped notch in the hem.

is suitably attached by bolts or the like 45 to a flat wall 46 of the cut out 43. The outer or upper end ofthe cutter block, 44 tapers to a point to provide a substantially inverted V-shaped cutter having two angularly disposed cutting edges 4'! on the upper face 48 thereof. The underside of the cutting. end of the block 44 is bevelled, as at 49 (Figure 26) to provide clearance forthe cutting edges 41 which cutting edges project beyond the annulus of the disc 41. A screw 50 (Figure 20) having an enlarged head 5|, is threadedly positioned in a bore 49' in the disc. wall 45 and the head 5i thereof is adapted to bear against a tapered slot or channel 52'formed in the lower web of cloth, it will be understood that, once in each rotation of the disc 4 I, the rolled or hemmed edge of the cloth web is provided with an inverted V-shaped notch 53, as best shown in Figure 35, for a purpose to be presently described. One end of the cutter disc shaft 5 5 carries a gear 55 which meshes with one of two gears 51 and 58 formed on a stub shaft 56 journalled in the blocks 42 below shaft 54. The other gear 53 meshes with a gear 59 journalled in the'blocks 42 which gear 59 in turn meshes with a gear Bl (Figure 3) carried by a-longitudinal driven shaft 60 journalled in the main frame I, and a gear I44 (Figure 5) formed on the outerend of shaft 60 is drivingly connected, as hereinafter described, with the main machine drive so that the shaft 60 andchain of gearing-just describedis driven to actuate the cutter disc't i r a The hemmed edge of the cloth having been notched, the next operation is the insertion or laying of a draw string within the hem and the stitching or sewing of the latter. Thus a suitable cylinder sewing machine 63 for stitching'the hem is supported on a bed plate 64 suitably mounted on the main frame. While the sewing machine is of conventional construction, suffice to say that it includes as best shown in Figures 1 to 4, a standard 65 and an overhanging bracket arm 66 terminating in a head. 61 Journalled in the bed 64 is a main shaft 63 which is connected, by means not shown herein, to an upper rock shaft 69 journalled in the bracket arm 66. The outer end of the main shaft 68 is provided with the usual balance wheel 16 and pulley ll which is drivingly connected by a belt 12 travelling over a pulley 13 carried by the outer end of the driven shaft 15 of a suitable electric motor l lmounted on the main frame I. The motor M is connected to a switch box 200 mounted .on the main frame by a line 20! and the switch box is connected to apowerline 2G2 with a source of power not shown. The rock shaft 69 actuates a needle 16 which is provided with sewing/thread 18 from spools 11, in the usual manner. The sewing machine is also provided with the usual presser foot 19, associated with the needle lfi and spaced slightly above acloth plate 80 over which the web of cloth passes.

Associated with the presser foot l9 and needle 16 cf the sewing machineis a cloth hem folder 6 or hemmer 8i (best shown in Figures -10 to 16) consisting of a plate 82 secured to a block 83 having enlarged openings 84 extending therethrough to receive bolts 85 for adjustably attaching the block 83 and plate 82 tothe cloth plate 88. One end of the plate 8215 cut away, as at 86, to enable the same to be snugly fitted around the presser foot 19,'and the inner side edge of the plate 82 is bent or curled into a U-shape, as at 82, to fold the hem spaced above the main layer thereof. A block 81, attached to the upper face of the block 83 and projecting laterally therefrom and overhanging a portion'of the plate 82, serves as a journal for two spaced vertical shafts 83 and.

89 upon the lower ends of which are mounted knurled or toothed discs 99 and 9|, respectively. The discs Ell-9| meshingly engage one another and the disc 90 is provided with a groove 92 in the knurled periphery thereof to accommodate a string S which is fed between the discs. A, substantially L-shaped arm 93, bolted, as at 94, to theside edge of the block'il'l and provided with a string guide opening 96 ,in thebent upper end 95 thereof, extends downwardly between the discs 9(i9l and is provided with an angularly disposed inwardly and downwardly extending string tube 9! on the. lower end thereof. The string S, from a source of supply suchas a spool 98, is passed through the guide opening 96 and thence downwardly and inwardly or laterally through the string tube 91 and directed against the discs 90-9! at their point of mesh. The shaft 89, carrying the disc 9!, is provided with a pulley 95 on the extended upper end thereof which pulley is drivingly connected by a belt lilll (Figures 3 and 9) with a pulley I02 formed on the upper end of 'a vertical shaft I01 journalled in the frame i.

The shaft H is driven by means of a belt H33 which travels over a second pulley H14 on the shaft lill and a pulley I05 .011 the extended end of a transverse shaft 35 carrying a smoothing roll I01, best shown in Figure 3. As the smoothing roll I9! is rotated, as presently described, the

' belts I03 and I!!!) are drivencausing the disc shaft $9 to be rotated which in turn rotates the disc 9! in a clockwise direction, viewing Figure 12.

Due to the meshing. engagement between discs BEE-53bit will be noted that rotation of disc 93 causes the disc 90 to be rotated in an opposing or counter-clockwise. direction, viewing Figure 12. During the rotation of the discs Sill-Al i, the string S, in passing through the string tube 97, is frictionally engaged by the knurled peripheries of the rotating discs 90-9I and directed inwardly over the travellingweb of cloth passing over the plate 82 and against the .curled side hem portion of the web engaging with the curved wall 82' of the plate 82. Thus, the string S engages with the unsewed hemmed portion of the web of cloth so that the forward motion of the latter causes the string S to be laid or positioned in the cloth hem, before the hem is stitched by the sewing machine needle l6. In order to assure of the string S being positioned properlywithin the hemmed portion of the cloth web, the string S is engaged by the laterally bent lower end m9 of a vertically disposed pin I08 (Figures 11 to 15) fixedly supported in a bracket HG suitably secured to the block 87 at a point above the outer edge of the knurled disc- Qt. As the web of cloth and string S pass through the folder or hemmer 8|, the string frictionally enages the bent end m9 of pin I [I8 and is deflected against the inner face of the hem so that the same will be entirely arranged within the hem in position for the needle 16 to stitch the hem, as the

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