Patent GB-190429241-A (GB)
Title: A Machine for Making Block Paper Bags.
Inventor: HENDERSON ALEXANDER
Filed: 1904-12-31
Granted: 1905-04-20
Abstract: 29,241. Henderson, A., and Mackay, G. D. Dec. 31. Paper bags.-In a machine for making squarebottomed paper bags, a sheet of paper is picked up by a pasting-arm from a pile of sheets placed on a side table and is drawn into the machine, where it is pasted and wrapped around a collapsable former. The former then collapses, and after the bag has been creased it is automatically withdrawn from the former and delivered from the machine. A sheet of paper is drawn from the table 189, Fig. 36, at the side of the machine, by a horizontal pasting-arm which is reciprocated in the guide 2, Figs. 2 and 5, by means of a link 29 connected to the pivoted piece 26. The piece 26 is oscillated by a pivoted lever 24 driven by a cam on the shaft 20, which is driven from the belt pulley 23 and has a clutch 187 operated by the hand-lever 188. As the pasting-arm reciprocates, it contacts with a paste roller (not shown) which causes it to transfer a little paste to the nearest edge of the bag paper. The pasting-arm carries the paper with it until it lies over a small table beneath the former 5, Figs. 1 and 2, the paper being stopped in its proper position by an arm 30, Fig. 10, which is pivoted between the brackets 32, Fig. 1, and is raised and lowered by a pivoted lever. The former 5 is connected to a pivoted lever 44, Fig. 5, provided with a balance weight. A cam on the shaft 20 reciprocates the lever 44 through the medium of the lever 41, and thus gives a vertical reciprocating motion to the former 5. As the former descends, it presses down the table beneath it and causes two sides of the paper to bend up round the former. The top of the former having descended to the level of the table 6, Fig. 1, the laps a, b, Fig. 33, are folded over one after the other by the sliding pieces 7, 8, Fig. 28, which are actuated by a pivoted lever 51, oscillated by a cam on the shaft 20. The motion of the pieces 7, 8 is governed by the springs 59, 60, and the motion of the lever 48 is limited by an adjustable rod. The top lap 77, Fig. 33, is bent over by the folder 9, Fig. 1, which is reciprocated in the slide 74 by the rocking lever 76 connected to another rocking lever 70 by the rod 72. The lever 70 is driven by a cam on the shaft 65. The bottom lap 84 is folded by another verticallyreciprocating folder (not shown) driven by a bell-crank lever, which is oscillated by means of a rocking-lever driven by a cam on the shaft 20. The ends 77, 81 of the bag are then pasted, to receive the flaps 12, 13, by means of the end paster 11, Fig. 1, secured to the slide 90, which is oscillated by the bell-crank lever 86, driven by the cam 85. The face of the paster 1 is supplied with paste by a roller 93 on the vertical slide 100. The slide 100 is driven from a cam on the shaft 65 by means of a bell crank driving a rocking lever. To prevent the end of the paster 11 from adhering to the ends 77, 84 of the bag as it recedes therefrom, a small rod sliding within the paster is caused, by the lever c controlled by the spring 102, to protrude from the paster as it recedes and to press on the ends 77, 84 until the body of the paster is clear of them. The flaps 12, 13 of the bag are turned in by two similar horizontally-reciprocating pieces 14, Fig. 27, driven from the cam 103, the motion of the parts being governed by the spring d. The former 5 is caused to ascend until it comes opposite the side creasers 16, 17, Figs. 1 and 2, and the end creaser 18, when it is caused to collapse. To effect this operation, the central supporting-piece 127 of the former is drawn back by means of the lever 128 operated by a cam on the shaft 110, which is driven from the shaft 20. The pieces 120, 118, to which the top and bottom plates of the former are fixed, are then caused to approach one another by means of rods 119 connected to the bell-crank levers 122, 123. The levers 122, 123 are operated by the pin 125, which engages with the arm 114, Figs. 1 and 2. The reciprocating motion of the slide 116, which carries the former 5, combined with the motion given to the rod 113 by the cam 109, causes the required action of the pm 125 on the arm 114. The former having collapsed, the side creasers 16, 17, Figs. 1 and 2, which are bolted to slides 144, are operated by levers connected to the rocking shafts 139, 140. These shafts are connected by rods 137 and are moved towards one another, against the action of a spring, by a rod 150 which is pivoted to the arm 151 x and is driven by a cam on the shaft 65. The end creaser 18, Fig. 1, is reciprocated between guides in the plate 142 by a pair of coupling-rods 159 connected to levers 157, oscillated by a cam on the shaft 65. Simultaneously with the creasing of the end of the bag, it is gripped by the removing - grips 160, 161, Fig. 11. The rods 163, 164, which actuate the pivoted fingers 160, 161, are pivoted at their rear ends to a slide in the piece 169, which slide is pressed by springs tending to keep the fingers 160, 161 closed. When the fingers 160, 161 reach the end of their forward travel, the catch 171 is raised by the piece 172<x>, Fig. 1, thereby releasing the lever 170, which is pivoted to the sliding piece in the frame 169, and allowing the fingers 160,161 to grip the bag. At the end of the return stroke of the fingers, the lever 170 is caught by the piece 172 which forces it back to the position shown in Fig. 11 and thereby causes the bag to be released. Fig. 36 shows an arrangement which may be employed to keep the top sheet of the pile of bag papers always at the same level. The table 189 is kept horizontal by the pivoted rods 198, 199 and is raised by the cam 190, secured to a hand-wheel which is rotated by the friction pawl 194. To form a support for the laps 77, 84, Fig. 33, when they are turned down, a sliding piece 135, Fig. 1, is inserted in the body of the holder. The spring 136 allows the piece 135 to be pressed back by the end creaser 18. For making bags of different sizes, other formers are inserted, and the level of the table 6 is altered by turning the worm 176, Fig. 1, and thus rotating the shaft 178 which carries two cams engaging with the lower edges 180 of the table. The distance between the side guides for the bag former may also be altered by turning a right and left handed screw and thus moving the side guides transversely. Instead of two side folders 14, Fig. 27, a single folder, hinged vertically, may be used. If it is desired so to fold the bag that the bottom is folded flat, instead of being creased as shown in Fig. 35, the parts are so arranged that, as the bag is taken off the former by the fingers 160, 161, Fig. 11, its open end is gripped between two jaws mounted ou a horizontallyreciprocating frame, which are so shaped that one part of the bottom is caused to rise up as shown in Fig. 42. The part 208 is then gripped between rollers which flatten the bag and transfer it to a belt which conveys it to the delivery rollers of the machine.