Patent GB-237037-A (GB)
Title: Flat paper cup forming machine
IPC: B31B25/00
Filed: 1924-04-30
Abstract: 237,037. Rogers, F. H., (Vortex Mfg. Co.). April 30, 1924. Paper bags, making.-Relates to a machine for producing conical paper cups in flat or collapsed form. Shaped blanks, which are of the form shown in Fig. 24, are fed singly from a magazine into the field of operation of a gripping mechanism, and are caused to undergo a sequence of operations, the first being the application of glue to two surfaces of the blank, followed by the action of successive folding and creasing mechanisms which firstly fold the blank upon itself and bend and press a glued flap against one side, then fold over the tip portion so that a glued face thereof is pressed against the reverse side, completing the cup, which finally passes into the underside of a stacking magazine wherein the stack of completed cups is raised each time a fresh one is added to the bottom of the pile. The blank feeding arrangement comprises a stack of blanks placed within the guides 48 of a magazine shown in Figs. 5 and 7. and in the left-hand bottom corner of Fig. 1, which is a plan of the machine, the lowermost ones being within the base part 46, and resting upon a pin 51 and the spaced discs of the feed-roll 45. The feed-roll derives motion from the main drive shaft 2 which drives a clutch housing 6 through a chain 3 and gear 4. Operation of a starting-handle. 32 rocks a shaft 31 causing a bell-crank 30. 33, Fig. 16, to shift inwardly a collar 15, causing clutch arms 13 to actuate brake bands 17, imparting motion to a sleeve 8 and hand-wheel 21 through pins 20, 22, Fig. 5. The hand-wheel causes rotation of a shaft 9 and gears 36 to 42 whereby the feedroll 45 is caused to rotate. At a predetermined time in each revolution of the roll, rubber-covered pads 52 are. brought into contact with the bottom blank of the stack and cause it to be fed through a slot 47 on to a table 82, the pin 51 cutting through the edge of the blank (see Fig. 24) during the feeding process. With the delivery of the blank a disc 53 is arranged to actuate an eccentric bar 55 and links 57, 76, Fig. 9, the connecting bar 77 and bell-crank 78 causing a lower gripper-bar 79 to move the lower gripper jaw 80 into open position. A carriage 70 carrying the upper gripper jaw 72 is also advanced towards the magazine 46, the upper and lower gripper jaws being disposed in position respectively above and below the advanced portion of the blank. With the next half revolution of the disc 53 the lower jaw 80 is moved up into closed position, after which carriage 70 starts to move away from the magazine. The blank is then removed from table-section 82 and advanced over section 81 over the lowered bar 86 to the position shown in Fig. 24, the rear curved edge of the blank resting on table-section 81 after passing the curved edge of plate 82. The gripping jaws are again opened with the next half revolution of the disc 53 and the advanced blank is released as the carriage 70 starts back to receive the next blank. A feeder plate 69 on the carriage is thus moved over the advanced blank into the position shown in Fig. 24 with the blank portion 110 between table section 81 and the feed plate. The blank is centred by a flange 75 on the carriage acting against its edge and pushing it back against edge 83 of the table plate 82. A cam 106, Fig. 18, Oil shaft 107, acting on a roller 105 now raises a slide bar 103 thereby operating a crank 101 and causing an arm 96 to swing upwardly in the glue tank 92, the glueing pin 97 thus being projected through an aperture 91 in the table 81 and supplying a dab of glue 108 to the under surface of the blank. After the application of the glue the bracket 89 Fig. 11 is raised by cam action and causes bars 86. 87 tn be lifted from the full line to the dotted position shown in Fig. 23 thus causing the part 109 of the blank to be bent by the upper bar 85, Fig. 7, into the position shown in Fig. 25. The carriage 70 commences to return after another blank has been seized by the gripper jaws and with the return movement the feed plate 69 moves against the upturned part 109 of the blank forcing the latter through a slot 88 between the raised arms 86. 87. and effecting the bending of section 109 against part 110, with the feed-plate still between the sections. With the advance of the blank, cam-operated means cause lowering of bracket 124 thus bringing the glue-applying rotary disc 126 into contact with the upper surface of marginal part 212 of the blank, the glue tank 123 and the disc being raised again after a strip of glue has been applied to the blank. During the folding of the blank in its passage through slot 88 the advance end passes under a rounded head 118, on an arm 119, Fig. 7, and over a slot 117. Fig. 24, ,thus becoming creased along the line 120, Fig. 25, to form flap 121, and with the continued advance the creased flap 121 passes over the inclined shoe 122 and over an inclined plate and is thus bent upwardly along crease 120. During this bending of the flap the carriage 168, Fig. 7, is moved by camoperated means towards table 84. the plate 170 causing the flap 121 to be folded over against and to adhere to section 109. The feed plate now advances the cup into the position shown in Fig. 27, with the tip 172 projecting over the edge of table section 84. As a result of cam action a shoe 182 is caused to bend down the tip 172, a pad meanwhile engaging the body of the cup. At this stage the gripper carriage 70 starts again to move toward the magazine 46, causing the feed-plate to be withdrawn from the cup. A cam 141 on the shaft 139 is retard to engage the tip of the cup and advance it over roller 188 and towards rolls 145, 150, Fig. 12, during which movement the tip is bent against the underside of the cup, the dab of glue 108 causing it to adhere thereto. The completed cup advanced by the feed-rolls 145, 150 drops into pocket 197, Fig. 9, of the cup-removing bars 196 which are moved towards the rolls by the carriage 192 slidable on guide-bar 191 by means operated from the eccentric bar 55, Fig. 3. As the carriage moves towards the cup-stacking end of the machine the bars 196 become raised and act to raise the stack of completed cups within the magazine 201, Fig. 3 ; the s,tack, upon reversal of the movement, falls upon the newly delivered cup in the pocket 197; the bars then fall and are withdrawn from the magazine. A carton may be engaged over the upper ends of ,the spring guides 205, and a stack of cups pushed upwardly into it. If during operation of the machine blanks or partly-formed cups become clogged there will be a tendency for shaft 9 to slow up so that relative movement takes place between hand-wheel 21 and disc 18, Fig. 5. When this occurs control pin 20 is forced away from the disc through the hand-wheel hub and against a ring 25 on the long arm 26 of a release bell-crank 26-28, Fig. 16. The short arm 28 of the bell-crank thus rises so that an adjustable screw 29 throws the short arm of the starting bell-crank 30 out of active position, thus moving out the clutch collar 15 to release the clutch drive and stopping the machine. The hand-wheel 21 may, of course, at any time be manually turned to cause the control pin to release the clutch drive, or the machine may be shopped by operating the control handle 32.