Patent GB-176500-A (GB)
Title: Improvements in or relating to the manufacture of boot or shoe heels
IPC: A43D33/04
Filed: 1920-12-07
Abstract: 176,500. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Dec. 7, 1920. Heels, machines for. - Pasted beel lifts are subjected in individual piles to a rapid succession of compressions to ensure adhesion before the paste sets. Heels formed of pasted lifts are assembled in a slide 18, Fig. 5, and then presented to jaws 92 in a rotating turret 86, Fig. 3. As the turret rotates step by step to receive fresh heels, pressing-devices 152 carried by a constantly reciprocating head 142, compress each heel individually a great number of times before the paste can set ensuring suitable pressure on each heel which passes over cupping-devices of incieasing size to shape the heel seat. The heels are nailed together during the compression by a plunger 62. The heel lifts are assembled between adjustable arms 234, 236, Fig. 5, which can be set by a handle 244 connected to bevelgears 240 operating around pivots 238. The breast ends of the lifts are pressed against a plate 20 adjustable vertically and horizontally by screws 42 and 26, Fig. 3. The slide 18 is carried towards the jaws 92 by a lever 48, Fig. 1, pivoted at 50 and operated by a rod 52 attached to a cam roll 54 driven by a cam on a one-revolution shaft 58, which is under the control of the operator. A shaft 138 rotates constantly and reciprocates a rod 134 which carries the pressing devices 152. The assembled heels are received in clamps, each comprising jaws 92, Fig. 6, carried by arms 88, pivoted loosely at 90. The extent to which the clamp closes is regulated by a screw 96, while the opening of the clamp is effected by a spring 112. The arms 88 are closed by levers 108, Fig. 3, pivoted at 110 to the turret 86 and operated by tension springs 114. As the turret rotates, a cam on the shaft 58 causes a lever 118 bearing another cam to press against the lever 108 so as to allow the jaws 92 to open near the slide 18 so that completed heels can be delivered to a shoot 300, Fig. 1, and fresh heels taken into the press. The shoot 300 is a folding one which is pressed back by the lever 48, Fig. 1, engaging a pin 316, to the position shown in Fig. 3, to avoid nailing mechanism 62 carried by the slide 18. Nails are driven upwards by drivers 68 operated by a plunger 62 engaged by a spring- pressed hammer 70 pivoted at 74, and operated suitably by a cam 80. The nails are clinched against a plate 34. The pressure head 142, Fig. 3, is locked against rotation by a movable latch 184 and is reciprocated by the rod 134 which slides in a sleeve 116 running on roller bearings 188 on a fixed sleeve 190 carried by main frames 192. The heels are engaged by the pressing devices 152 attached to pivoted pieces 174 carried by the main head 142. Spring pins 178 prevent the heels from adhering to the devices 152. after the pressure is removed. As the heels rotate they are brought in their last two positions above cupping devices 248, 250, Fig. 10, of increasing convexity which shape the heels to fit heel seats. The. plate 246, Fig. 10, carrying the cupping-devices forms a movable part of a main table 12, and is reciprocated vertically by a rod 256, the lower end of which works in a hollow guide 258. An adjustable wedge 264 is reciprocated by a rod 268 camoperated from the shaft 58. In this way the cupping devices are raised and lowered. The heels are prevented from sticking to the table 12 by pins 274 operated by reciprocating cam surfaces 276. The turret 86 is rotated step by step by pawl and ratchet gear, Fig. 8, operated by a cam 210 on the shaft 58. A pin 212 can be released to allow the turret to be rotated by a hand lever 214.