Patent GB-490218-A (GB)
Title: Improvements in or relating to staple forming and inserting machines
IPC: A43D69/04
Filed: 1937-02-10
Abstract: 490,218. Stapling. UNITED SHOE MACHINERY CORPORATION. Feb. 10, 1937, No. 3911. Convention date, Feb. 12, 1936. [Class 89 (iii)] Relates to staple forming and inserting machines wherein the staple-forming mechanism is moved up and down above a stationary anvil for clamping and releasing a work-piece, as is desirable when stapling bows or the like to shoes or shank pieces to insoles ; and consists in a machine, more particularly for stapling-in the ends of cartons, wherein a throat is formed integrally with an outside former, and a member arranged to bridge the gap between the throat and former can be moved away from a position in which it completes the driver passage, so as to leave room for the shaping of the staple. As shown, the driver 50 is carried by a plunger 22 reciprocated by a lever 18 and a roll 16 on an arm 14 carried by, and radially adjustable on, the main shaft 10. The plunger 22 is guided in a plunger 26 which carries the unitary throat 48 and outside former 46 and is reciprocated by a lever 28 and cam groove 32. An inside former 40, Fig. 5, is held in staple-forming position by a spring, and withdrawn by cam means as the plunger 26 descends. A driver and stapleguiding passage 52, 56 is provided in the former 46 and throat 48, and is completed by a block 58 which is urged inwardly by a spring, but is held outwardly by cam means when the plunger 26 is raised. Thus. a space is left permitting a staple blank of wire to be fed over the inside former and to be bent freely thereover by the outside former as it descends. The staple wire 80 is fed, across the former 40 and below a cutter 98 carried adjustably by the former 46, by rolls 86, 84. The roll 84 is oscillated by a link 100 secured adjustably to a lever 102 actuated by an eccentric, and the presser roll 86 is disengaged from the roll 84, during reverse movements of the latter, by a lug 92 on the lever 28. Adjustment of the staple length, and equality of its legs, is secured by adjusting the die 96, cutter 98, and link 100. The machine is provided with a rotary holder for a carton 110, Fig. 7, comprising resilient arms 118 which are radially adjustable on a rotary head 122 by adjusting a cam plate 128, Fig. 10. The head is carried by a hollow shaft mounted in a bearing 132 which is vertically adjustable with respect to the throat 48. A stationary anvil 120 is supported by a spring 190 and has a, rotary adjustment 192 and a vertical adjustment 194. The arms 118 are spread to accommodate cartons of a larger size, and excessive spreading, such as would result in fouling of the throat 48 by the arms, is prevented by a stop member 137, the position of which can be varied by adjusting the bearing 132. The hollow shaft is rotated, so as to index each side of the carton in turn with the throat, by a hook 144 on a rod 146 operated by an eccentric on the main shaft. The hook engages pins 142 carried by the hollow shaft, and overthrowing of the shaft is prevented by a spring plunger. The machine is intended to drive four staples and then stop. To this end, the main shaft 10 is clutched to its pulley 162 when an arm 158 is disengaged from a cam 160 by depression of a treadle rod 152. Re-engagement of the members 158, 160 is prevented, until four staples have been driven, by a rod 166 having a roll 168 adapted to engage a depression in the rotary head 122 after four machine cycles. Stopping is facilitated by a non-rotary brake disc 174 which is applied by a toggle 178 when the roll 168 enters the depression. If it is desired to stop the machine after a single staple has been driven, a finger 196 is turned up so that it prevents engagement of the hook 144 with the pins 142. The roll 168 then re-enters the depression as soon as the treadle is released. Specification 17439/05, [Class 89 (iii)], is referred to.