US1176641A - Paper-bag-making machine. - Google Patents

Description

H. A. BARNETT.

PAPER BAG MAKING MACHINE.

APPLICATlON FILED MAY 9. I913.

1,176,641. Patented Mar. 21, 1916.

4 SHEETS-SHEET l.

ms COLUMBIA PlANOGRAPH co, WASHINGTON, n. c.

H. A. BARNETT.

PAPER BAG MAKING MACHINE.

APPLICATION FILED MAY 9. 1913.

1, 176,641. Patented Mar. 21, 1916.

4 SHEETSSHEET 2.

THE COLUMBIA Pumomuum co.. WASHINGTON, D. C.

A H. A. BARNETT.

PAPER BAG MAKING MACHINE. APPLICATION FILED MAY 9. 1913.

1, 176,641. Patented Mar. 21,1916.

4 SHEETSSHEET 3.

H. A. BARNETT.

PAPER BAG MAKING MACHINE.

APPLICATION FILED MAY 9, 1913.

Patented Mar. 21, 1916.

4 SHEETS-SHEET 4.

HARRY ALFRED BARNETT, 0F CLAPHAM PARK, LONDON, ENGLAND.

PAPER-BAG-MAKING MACHINE.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed May 9, 1913. Serial No. 766,529.

T 0 all whom it may concern Be it known that I, HARRY ALFRED BAR- NETT, a subject of the King of England, residing at Romany Manor, 135 Kings avenue, Clapham Park, London, England, have invented certain new and useful Improvements in Paper-Bag-Haking Machines, of which the following is a specification.

This invention relates to the manufacture of bags, envelops or the like, of paper or other material, and refers to an improved machine or apparatus by means of which the paper bags, envelops or the like can be made up from suitably shaped blanks, which blanks are picked up from a pile, folded, and the edges pasted or gummed and turned over, the unfinished bag or the like being then passed through suitable pressing rollers into a delivering device or collector, from which the finished bags or the like may be removed by hand or from which they may pass to a suitable printing machine. The collecting device is also suitable for use for collecting sheets, bags, envelops or the like generally, when delivered from bag-making, printing or other machines, from which sheets or the like have to be delivered at a high rate of speed.

In order that my said invention may be clearly understood, I will proceed to describe the same with reference to the accompanying drawings, which show by way of example, a simple and a more highly developed embodiment of the said invention, both suitable for making paper bags at a high rate of speed, the second form of the machine having combined therewith the collooting or delivering mechanism enabling the finished bags or the like to be quickly collected by hand or to be passed on to a printing press or the like.

In the accompanying drawings, which, as will be well understood, are given merely by way of example :-Figure 1 is an elevation of the back of the first or simpler form of the machine; Fig. 2 is a side elevation of same; Fig. 3 is an enlarged elevation of the adjustable plate carrying the pressing rollers and their associated frame; Fig. 4 shows side elevation of same; Fig. 5 is a side elevation, and Fig. 6 a plan of the pasting or gumming device; Fig. 7 is a diagrammatic view of the arrangement of gearing for driving the various rollers; Fig. 8 is another diagram showing the correlation of the various rollers; Figs. 9 to 11 show diagrammatically one arrangement of pickup rollers in three different positions; Figs. 12 to 1% show also diagrammatically another arrangement of pick-up rollers, again in three dilierent positions; Figs.15 to 17 show details of the method of driving one of the pick-up rollers; Fig. 18 shows section of device for removing and collecting paste from the two top rollers; Figs. 19 and 20 show respectively,in side elevation and plan, one form of frame for holding the blank to be made up into bags or the like; Fig. 21 shows a diagrammatic representation of a portion of a simple collecting device in combination with the machine; Figs. 22 and 23 show plan of the adjustable frameworks and plates in two different positions.

The same letters and numerals of reference are employed to denote the same parts in all the views.

In order to facilitate the comprehension of the description the parts of the machine for performing the various operations will be taken in succession and the action of each portion will then be described.

Referring to Figs. 1 and 2 the machine is provided with legs a having bolted thereto side frames b. At the lower portion of the frames 7) are provided slots 0. Through these slots 0 pass arms d carrying a table a for supporting the pile of paper blanks f, to be made up into bags or the like. The arms (Z pass through to the outside, and each has connected thereto a plate 9, one coming on either side of the machine. The plates 9 have pivotally mounted thereon, wheels 71. These wheels h run upon either side of a vertical guide 70 attached to the side frames Z) by brackets on and a. At the back of the plate 9 is a small wheel 39 provided with a groove. Around this wheel passes the looped end of a cable (I. The cable (I. on each side of the machine. passes upward to the top, the mechanism and parts being so arranged that the cable is not fouled. 1", r are grooved wheels mounted upon spindles projecting from the tops of the side frames 1). Over these wheels 1' the cables c are passed, and at the other side are attached by means of an eyeleted bolt and nut to a rod 8 running transversely at the back of the machine. At the center of the rod 8, a vertically depending rod 15 is attached by suitable nuts. This rod t passes some distance downward and carries at the bottom a washer and nut u. The rod t, at the top, is formed with a flattened portion a.

w are a number of disks constituting weights. These disks are provided with slots in the manner well known with the weights of a weighing machine, the slots being of such size that they can readily pass the flattened portion 1), and that the circular portions can be threaded upon the rod t.

2 are distance bars, bolted across each pair of legs a.

3 are brackets, ustably attached to these connecting bars 2, which brackets 3 have bolted Or otherwise fixed at the top thereof, two strips l, in such a way that a slot is left between the said strips.

5 is a tapering rod connected to the underside of the table 0 and of such diameter as to pass readily through the slot formed between the strips 4.

6 are disks of heavy metal, for instance zinc. Each disk 6 has a circular hole of such size that the hole in the disk next above, is slightly smaller, while the hole in the disk next beneath any particular disk is slightly larger than that in the disk in question.

\Vhen the table 6 is in its lowermost position, all the Weight of the disk 6 is taken upon the strips 4, but when the table 6 rises, owing to the thickness of the pile of paper diminishing, then the tapering rod 5 picks up successively the disksthe holes in such disks being suitably graduated for the pur pose. At Figs. 1 and 2 a number of disks 6, shown at a certain distance apart, are being carried by the tapering rod 5, while the remainder are resting upon the strip 4, and have not yet been picked up.

The object of the construction described is that at the commencement of operations, sufficient weights to are placed in position to compensate for the weight of the pile of blanks f, and of the table and associated parts, and also a certain definite number of weights w is added to give the required upward pressure to the pile of papers. As the paper blanks are fed up into the machine and the weight on the table diminishes. the rise of the table 6 causes a number of the disks 6 to be picked up by the rod 5, and the weights of these disks are so calculated as to compensate for the paper fed up into the machine, the upward pressure remaining constant.

The portion of the machine which picks up the paper blanks, one by one, and folds them across, will now be described, with reference to Figs. 1, 2, and S to 1 1-. 7 is a roller which is preferably made of polished steel. The spindle of this roller 7 works in suitable bearing blocks 8 located in a slot in the side frame Z). 9 are bearing blocks carrying the spindle of another roller 10 (Figs. 8 to 14-) of similar diameter, but covered with rubber. T he distance between the rollers 7 and 10 can be regulated, but generally they run practically in contact. The adjustment may be effected by screws 11, and is also facilitated by means of a hollow block 12, in the hole in which is located a strong spiral spring, so that if the screws 11 are loosened, the spring within the block 12 forces the olocks 8 and 9 apart. The rollers T and 10 are driven by suitable gearing so that they turn in opposite angular directions, see Figs. 8 and 14.

It will be remembered that the pile of paper blanks is being pushed upward before described, against the surfaces of the rollers 7 and 10, see Fig. 1. As the rollers rotate the frictional grip of the rubber roller 10, upon the surface of the top sheet of paper causes this sheet, Fig. i), to arch up ward as shown, Fig. 10, until the top of the arch is gripped between the two rollers, Fig. 11, causing the sheet to be creased and passed upward through the two rollers.

An alternative method of picking up the top sheet and folding it is shown at Figs. 12 to 14. In this case the rollers 7 and 10 are formed partly hollow with a longitudinal slot 12' extending along the surface of each roller in communication with the hollow portion 13 therein. The portion 13, in turn, communicates through a suitable hollow spindle and pipes with an air pump so geared with respect to the rollers that when they are in position shown at Fig. 12, the pump exerts a strong suction at the slots 12, causing the top sheet of paper to be held against such slots. As the rotation of the rollers continues, in the direction of the arrow, the position shown at Fig. 12 is reached, while the slots 12 are all the time maintaining their grip upon the top sheet of paper. When the sheet has been creased and passed between the rollers, then the grip of the slot 12 is released. This is effected from the pump, which is now caused to blow out air, the suction being turned into a puff and the top sheet liberated.

The pasting or gumming device, which is located immediately above the pick-up roll ers iust described. will be now considered with reference to Figs. 1, 2, 5 and 6. As

suming that a paper blank shaped as shown at Fig. 520 is being made into a bag; after passing through the pick-up rollers, it has been folded about the line A, B, leaving two extending side flaps 14 which are now supplied with paste or gum. 15 is the spindle. located in bearing blocks is. and carrying two rollers 17. each of which is provided with a groove 18. the rollers being so mounted that they can be lu'ought nearer together or separated for adapting the machine for gunnning blanks of various sizes. Mounted opposite each of these grooves 18 is the device shown at Figs. 5 and 6. consisting of a gmmning wheel 15 mounted upon a spindle 20. rotated by a, gear wheel 21. meshing with the gear wheel :52. see Fig. T. the wheel 22 being the one causing the spindle 15 to rotate. The size and ratio of the gear wheels 21 and 2:2. and the size of the wheel 19 are such that the peripheral speed of the wheel 19 is the same as the peripheral speed of the roller 17. so that the wheel 19 turns at the same speed as the paper passes the said wheel. and thus the paste carried on the wheel is evenly distebuted to the paper. :23 is a reservoir into which the wheel 11 dips. and 2% a fiat spring attached to one side of the reservoir and provided at the other end with a nose .15 of such size as to enter into the groove in the wheel 19 and with a flattened portion coming at each side of the nose. 27 is a rod pressing upon the spring 24'. which rod is screw threaded and passes through a suitable screw threaded bush 28. 29 is a milled head. by which the rod 27 can be turned. Bv turning the head 29. the distance of the nose and the flattened portion from the bottom of the groove. and from the surface of the wheel 19 can be regulated. thus regulating the amount of paste put on the bag. The sides of the wheel 19 are kept cl an on the outside by the scraping portions 30 and 31 kept pressed against the sides of the wheel by springs 12 and 33. The spindle 2 of the wheel 19 is carried by an arm 31. attached by a bolt to two inclined strips 35 firmly connected to the reservoir 23. 36 is another arm also held within the strips 35 by suitable bolts and nuts. The arm :16 is adjustably clamped upon the distance bar 37. so that the position upon the said bar can be varied in order to bring the pasting roller 19 into anv required position opposite the groove 19 in the roller 17. It will be understood that two of these pasting devices are provided one on each side of the machine opposite. to the flap to which it is required to supply paste as the blank emerges from between the rollers 7 and 10 and passes up through the machine. At Fig. 1. the pasting devices are omitted. as they are shown more clearly at Figs. 5 and 6.

The portion of the machine for turning over the side flaps which have already been supplied with paste, will now be described.

38 are rollers, mounted in suitable bear ing blocks 39, located on the framework 6. These rollers are positively driven by gear wheels 40. as described later. Running in contact with the rollers 38. are other small rollers 11. which rollers are not positively driven, but are kept pressed against the rollers 38 by springs 42, and are thus caused to rotate. Two rollers 11 are provided for each roller 38. The rollers 11 are mounted loosely upon the fixed spindle 13. located in slots 4% on a framework 45. Two frameworks 15 are provided. one on each side of the center line, and they may be separated or brought nearer together by suitable means. in order to adjust the machine for blanks of different sizes. The degree of compression with which the springs 42 press forward the rollers 41 can be regulated by means of screws to. l pon each framework 15 are attached two plates 47 so that a plate -17 on one frame comes exactly opposite the plate 47 on the other frame. These plates 17 are provided with blocks t8. so that two blocks 48. one on either framework can be inserted into a grooved guide 49 provided in a cross bar 50. A cross bar is provided toward the top and bottom of the frame 45. 51 are washers and nuts adapted to secure the blocks 48 and consequently the frames 45 in a definite position.

The two outer walls of the framework 45 are provided toward the middle with extensions 53. which are internally screw threaded one with a right hand thread, the other with a left hand thread. 51 is a circular rod formed at one end with a right hand thread and at the other end with a left hand thread. The said screw threaded ends screw through the internally screw threaded portions 53. 55 is a circular boss with a number of holes 56. \Vhen the nuts 51 are slackened and the frames -15 are entirely free from each other. if a suitable tool is inserted into one of the holes 56 and the rod 31 rotated. the frames move with respect to each other. as the screw threaded ends of the rod 54 act upon the internally screw threaded portion 53. causing the frameworks to slide in a guideway 49 by means of the blocks 48. 1V hen the frameworks have been given the right adiustmei'lt. the nuts 51 are tightened up. and if desired bolts 57 may be passed through the inner walls, bolting the frameworks together. If the frameworks are some distance apart. which is not the case on the drawings. suitable distance pieces may be located between the said frames. In the drawings. the frames are shown touching each other. If desired, when the plates 58, hereinafter mentioned,

are adjusted some distance apart, and it is required to hold the plates firmly in the adjusted position, the device shown at Figs. 22 and 23 may be used. Fig. 22 shows a plan of the plates 58 with their associated frames 45, in which the plates 58 are touching. At Fig. they are some distance apart. The back of the frames 45 is slightly cut away at 96. When the parts are in the position shown at Fig. 23, a distance piece 97 is inserted, provided with tongues 98 entering the groove formed between the cut away portions 96 and the overlapping part of the plate 58. 99 a tongue resting upon the top of the frames 45. \Vhen it is desired to adjust the frames to any particular measurement, a suitable distance piece 97 is inserted between the opened out plates and frames, and the plates 58 and frames l5 are caused to move together again, until they come against the sides of the distance piece, see Fig. 23.

Attached to the frameworks 15, are plates 58 provided with beaded edges 59. The two plates 58, taken together, form as shown at Fig. 3, a taper plate, tapering from the bottom toward the top. The plates 58 have slots 60, through which the pressing rollers ll are adapted to project. 61 are strips attached by brackets 62 to the frameworks elf). in such a way that these strips 61 incline inward. and are raised some small distance above the level of the plates 58. The lower ends of these strips 61, that is, in the position where the distance between these strips 61 at the bottom is wider than the width of the plates 58, are curved downward and outward at 63, see Figs. 3 and 4, so that the ends of the strips 61 project some distance below the plates 58. Now, when a folded and pasted blank is being drawn upward by the positive action of the rollers 88, and by the pressing action of the rollers 11, the edges of the blank project beyond the plate 58 at the bottom. \Vhen, however, the said edges come in contact with the curved portion 63, the said ends are gradually turned over and as the bag continues to move, the said turned over edge is caused to go beneath the strip 61, that is. it is folded over. V

()wing to the fact that the plates 58 gradually increase in size the folded over portions are gradually lessened in width, until. on reaching the top, the width of the flaps is the amount of overlap required. As the lessening action takes place throughout the whole length of the bag it follows that the overlap of the flaps at either side will be of uniform width throughout the whole length of the said bag, and as the flap has been pasted and the pasted edge turned inward, the surface of the flap coming against the bag is the pasted edge. The beads 59 prevent the turned over flaps coming in contact with the surface of the plate 58, avoiding smearing of the plate with paste carried by the flaps.

The bag passes from the top of the plates 58 between two positively driven rollers 61, 65. The roller 65, see Fig. 1, is formed from two roller portions adjustably mounted on a spindle 66. The rollers 64, 65 are intergeared and turn in opposite directions. The spindle 66 of the roller 65 is carried in an adjustable bearing block 67, so that the pressure between the rollers 61 and 65 can be varied. The edges of the bag, passing up from the plate 58, pass between the two rollers 6-1 and 65, and the outer edge of the gummed flap is pressed tightly on to the body of the bag, the gum being pressed toward the edge of the flap. As the bag continues to pass on. it is caught between two other rollers 68. 69. also positively driven and intergeared. The roller 69 is composed of two adjustable roller portions, the width and position of these being such that they press upon the whole width of the pasted fla p. As these rollers rotate, the bag is lin ished and delivered from the machine either to a collector, or else it is caught up and taken to a printing machine.

The pairs of rollers 61, 65 and 68. 69 are of slightly greater diameter than the last roller 38 and pressing roller 11, but they rotate at the same angular velocity. The result is that as the bag passes from between the last roller 38 and the pressing rollers 11, both of which rollers are of metal, the larger rollers pull the bag faster than it is fed out by the smaller rollers, causing these latter to exert a kind of rubbing or ironing action upon the flaps.

Any gum or paste which finds its way on to the surface of the rollers 68,69, is cleaned off by scrapers 72, 71, see Fig. 18, where the rollers 68, 69 are being scraped by knives 72 and 71 pressed upon the rollers by springs H. 73 attached to adjustable carrying irons T6, 75 connected by suitable screws with bars 78. 77, running transversely across the ma.- chine and suitably attached to the side frames 7). Removable boxes 80, 79 are provided to catch the accumulated paste removed from the said rollers.

The general arrangement for driving the various rollers will now be described with reference to Fig. 7. 81 is a bracket, attached by suitable screws to one side frame I). This bracket carries the bearing of the driving shaft and has mounted thereon a loose pulley 82 and a fast pulley 83. Upon the shaft, on the inside, is a gear wheel 81, meshing with one of the gear wheels 40, which is the gear wheel mounted upon the spindle of one of the positively driven rollers 38. The wheel 40 is connected with the next wheel 40 by an intermediate gear 85, which gearing is repeated, as will be seen from Fig. 7 to the top and bottom of the machine. At the top,

however, the last two positively driven wheels 10 are intergeared with other wheels 86, so that the two sets of rollers 01, (35 and 68, 69 are driven in opposite directions. Toward the bottom of the machine, one of the positively driven wheels 22 meshes with the wheel 21, of the pasting device, it being observed that the wheel 22 is duplicated at either end of the roller, a pasting roller being provided at each side of the machine.

As the machine is designed to be driven with great rapidity, it is necessary to insure that each bag is removed from between the first pair of rollers 7 and 10, before the next bag is gripped by them. To effect this I adopt the following arrangement. Referring to Figs. 7, 15, 16 and 17, the idle wheel 85 meshes with the positively driven wheel 22. The idle wheel also gears with another wheel 87, which is of larger size, and has a larger number of teeth than the wheel In this way the rotation of the wheel 87 is slower than that of the wheel 22. The wheel 87 is not directly connected with the spindle of the roller 10, that is with the rubber covered roller. The wheel, however, has a projecting peg 88, working loosely in a boss 89 in connection with the roller 10. The boss 89 has a flattened face 90.

91 is a pin mounted upon the surface of the gear wheel 87, which pin is adapted to bear against the flattened portion 90, so that when the parts are in the position shown in Fig. 16, that is when the pin 91 is resting against the flattened portion 90, and the gear wheel 87 is turning in the direction of the arrow, then the pin 91 transmits the rotary motion to the boss 89, causing the rubber-covered roller 10 to rotate. As the paper passes up between the rubber-covered roller 10 and the steel roller 7 (it being understood that the rollers 7 and 10 are intergeared by equal gears at the other side of the machine to that in which the slip gear just described is located) it is, as previously stated, caught up by the gumming device. The roller 17, causing this catching up, is of the same diameter as the roller 10, and consequently as the roller 17 is being driven by the wheel 22, and the roller 10 is being driven by the wheel 87, the paper caught up by the said roller 17 is caused to move faster than when it is working through the rollers '7 and 10. If no additional device were provided, the paper gripped between the rollers 7 and 10, and pulled quicker by the roller 17 would be torn. To overcome this drawback the beforenientioned mechanism is provided, and when the paper is caught up by the roller 17, it slips over the polished steel roller 7, and as it is in frictional contact with the rubber covered roller .10, it causes this roller 10 to be turned faster than it is being driven by the wheel 87, that is the flattened portion 90 is caused to leave the pin 91, and go on in advance until the other side of the flattened portion comes against the pin. This position is shown at Fig. 17. Now, before the next bag can be picked up between the rollers 7 and 10, the pin 91 has to make a partial rotation, in order to catch up and come against the flattened portion 90, to recommencc the drive.

The arrangement of the pressing and other rollers is shown at Fig. 8, where the rollers '7 and 10 will be seen at the bottom with the pressing rollers 11 projecting through the plate 58, and touching the rollers while at the top the rollers 64, 65 and 68, 69 are seen in contact.

Referring to Figs. 19 and 20, where one form of av guide is shown for holding the pile of paper blanks: 92 is the base provided at the corner with angular uprights 91-. are other uprights provided at the side of the base. These uprights hold the paper in a firm, definite position, and when the base 92 is placed upon the table 6, between stops, which may be adjustable, it comes to the right position beneath the rollers 7 and 10. Suitable means, such as a handle or the like which brings a projection into the upward path of the table, may be provided to prevent the upward rise of the table when not required.

At Fig. 21 is shown the top of a collecting device. 100 is a curved plate located just above the last pair of rollers 68, 69 in such a manner that the bag 101 delivered through these rollers is diverted and turned over and hits against an upright plate 102, whence it drops on to a table 103, or if there are bags on the table 103 on to the pile of bags. The table 103 is provided with guides 101, working in slots 105. The table 103 is under the control of suitable gearing, causing it to be gradually lowered, according to the number of bags passing through the machine, so that the top of the pile maintains a constant level. The plate 102 may be furnished with a suitable door from which the pile of finished bags may be removed.

Referring to Figs. 21 and 25, which show the modified and more highly developed form of the mechanism, 100 is the base plate, to which are secured two side frames 107, in which the bearings for the various rollers and parts are located. These bearings are in every case, where possible, ball bearings. The frames 107 are provided toward the bottom with slots or openings 10?. 109 are lugs, of such size, as to pass easily through the openings 108, and attached by bolts to a table 110. The lugs 109 have attached thereto at the outside of the frames 107, rods 111 extending upward and attached at the top to a cross member 112. 11 3 are adjustable bearings, attached to the side frames 107, through which the rods 111 can easily slide. These bearings 113 may, if desired,

be provided at the interior with rollers or other devices for allowing the rods 111 to slide easily therein. 114 are arms, fastened at the top and bottom, to the rods 111. These arms 114 carry other compound rods made up from a straight rod 115 jointed to a tapering rod 116 by means of a socket joint 117. 118 are brackets attached to the side frames 107, upon which rest, when the device is in the position shown on the drawing, a number of disks 119, which are provided with apertures at the center, increasing progressively in size as they proceed downward, so that the top ones lit the rods 116 where the diameter of such rods is the smallest, and the bottom ones where it is the largest, while the disks lying between fit the rods at corresponding intermediate positions. 120 is a girder like member, connecting the two frames 107 at the top. To this member 120 bolted brackets 121, formed at the top into bearings for the axle of a wheel 122. 123 is a steel wire cable passing through a hole in the member 112 and attached beneath same. The other end of the cable passes o er a pulley and has attached thereto, see Fig. 2t, a weight 124. This weight 12% is made up of a number of semi-circular disks placed around a rod 125, so that by using a larger or smaller number of these semi-circular disks, the weight may be aried. The table 110 is furnished with guideways 126, in which can be fitted a projection 127 on the underside of a table 128, furnished with wheels 129 to facilitate mo\ einent. The table is intended to carrying the paper blanks, and has mounted thereon a number of adjustable abutments for insuring the correct disposition of the paper. 130 is one abutment, which is provided with a downwardly extending lug. This lug forms a nut, and has working therein a. screw 131 controlled by a head or handle The table 128 is furnished with a slot, and it will be seen that by turning the head 132 the position of the abutment 130 can be varied. 133 denotes two other abutments, which can also be adjusted similarly for accommodating paper of different widths. The preferred method of adjusting these abutn ents is to provide them with lugs forn'iing nuts working in slots in the table 128, and to operate the screws working in the nuts simultaneously by means of bevel gearing from one handle. When the table 128, with the pile of paper 131 is in position, the parts are held in place by means of a hooked member 135 engaging in a depression in the member 112. \Vhen the hook is disengaged, the weight 124 is so arranged that it causes the pile of paper 13 to move upward into contact with the pickup rollers. and to press against the said rollers with a certain pressure. As the papers are picked up, the weight of the pile 134 is decreased. This is compensated for by the rods 116 which have also risen to a like extent, picking up some of the disks 119, which are so weighted and designed that for a given consumption of paper, corresponding to a certain distance, they pick up a number of disks sufficient to compensate for the paper used. It will be obvious that where paper of different sizes, thicknesses and weight are employed, ditli'erent sets of disks 119 have to be provided.

Referring to the improved mechanism for picking up the paper blanks and folding them across, this portion of the machine will be clearly understood from Figs. 24C, 25, 26, 33. Here 136 is a metallic roller, driven in the direction of the arrow Figs. 26, 33, in the manner hereinafter explained. This roller rolls in contact with another driven roller 137, the surface of which is partly metallic and partly of rubber or other suitable material at 138. Mounted between the rollers 136 and 137, below same, but not in contact therewith, is a small freely rotating roller 139. The position of the three rollers 236, 137, 139 is moreover such that the lowermost portions of their peripheries come in the same horizontal plane. The operation of these rollers will be readily understood:-The uppermost sheet of paper is being pressed against the rotating rollers 136, 137 with a certain uniform pressure. The metallic portions of the rollers 136 and 137, have little or no picking up effect upon the paper, but as soon as the rubber portion 138 comes around it pushes the topmost sheet of paper up as shown at Fig. 33, carrying same along and around between the freely rotating roller 139. This causes a crease to be formed across the paper, the paper being then carried on between the two rollers 136 and 137. This method of picking up the paper has been found in practice of special advantage, as there is no tendencv, as with other forms of machines to pick up more than one sheet of paper at one time. Moreover, the roller 139 prevents the bunching of the paper between the two rollers. In practice. the pile of paper is placed between the pickup device with the middle line where the fold is to be made coming to the right hand side of the axial line of the roller 139, that is on the same side of such axial line the part rubber roller.

hat I claim is 1. A machine of the character described, comprising a device for turning over the flaps, consisting of a plate with outwardly tapering edges in combination with pieces suitably shaped and mounted at the sides for turning over the flaps and adjusting them so that when the bag or the like in the course of manufacture leaves the device the flaps are turned over to a uniform width,

with suitable positively driven and frictional rollers for causing the travel of the bag.

2. A machine of the character described comprising a device for turning over the flaps, rollers arranged in pairs between which the blanks pass after leaving the device for turning over the flaps, and means for driving said rollers in such a manner 10 that the subsequent rollers move at a higher speed than the preceding ones or folding rollers in order to produce a pressing or creasing action on the flaps, substantially as described.

In testimony whereof, I afliX my signa- 15 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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