Patent GB-149964-A (GB)
Title: Improvement in lasting machine
IPC: A43D21/16
Filed: 1920-08-07
Abstract: 149,964. Reece Shoe Machinery Co., (Assignees of Perri, A.). Aug. 14, 1919, [Convention date]. Lasting and pulling-over.-In a lasting.ma. chine, the shoe is held in an elevated position with sole rearward and toe upward during pulling- over, and in a lower position with its sole upward during wiping, the jack being pivoted to swing- about a centre rearward of the pulling over position of the shoe and higher than the wiping position. After lowering, the shoe is swung about its forepart to the wiping position, the toe and heel wiping means being on the operator's left and right respectively. Each side gripper has an equalizing-device allowing for the greater resistance at the top-cap. Holding-fingers retain the upper in pulled-over position during the shifting of the jack. The pulling-over grippers are automaticaily shifted by the moving jack to position for right and left shoes alternately. After lasting, the shoe-engaging members of the'jack are simultaneously unlocked by a single pedal. The shoe is first positioned with the upper between toe. grippers 64, Fig. 4, and two pairs of side grippers 131. Adjacent each gripper is a stop 68, 69 which contacts with the last. The operator then depresses a pedal connected by links and levers to three slides 80, 162 engaging and retracting arms 78, 164 which first close and then retract the grippers. The pivoted jaw 131 of the side grippers is slightly hook-shaped, Fig. 11, and is operated tion. After lowering, the shoe is swung about its forepart to the wiping position, the toe and heel wiping means being on the operator's left and right respectively. Each side gripper has an equalizing-device allowing for the greater resistance at the top-cap. Holding-fingers retain the upper in pulled-over position during the shifting of the jack. The pulling-over grippers are automaticaily shifted by the moving jack to position for right and left shoes alternately. After lasting, the shoe-engaging members of the'jack are simultaneously unlocked by a single pedal. The shoe is first positioned with the upper between toe. grippers 64, Fig. 4, and two pairs of side grippers 131. Adjacent each gripper is a stop 68, 69 which contacts with the last. The operator then depresses a pedal connected by links and levers to three slides 80, 162 engaging and retracting arms 78, 164 which first close and then retract the grippers. The pivoted jaw 131 of the side grippers is slightly hook-shaped, Fig. 11, and is operated by the link 164 through a lever 165 provided with teeth meshing with others on the jaw. The upper end of the jaw is allowed to lag by parallel link mechanism 134, 135, Fig. 4, constrained by adjustable stops 137, 140. The pulling-over pedal is held to retain the strain on the upper by a rack and pawl, and the grippers may be further adjusted by hand-levers. The pawl is tripped when desired by a second pedal. When the pulling-over is complete, the jack is brought up to the shoe. The toe is engaged by a self-adjusting pad 194, Figs. 19 and 22, and spring lingers 253 are pressed against the edges of the upper by a toothed rack 258 gearing with segments on arms 255 carrying the fingers. The fingers 253 may turn inwards at their ends to press the edges of the upper against the sole of the last. The jack has a heel post 207 adjustable longitudinally of the last and held up to the last by a rack 211 and a pawl. Clamps 217 are pivoted to a sleeve 219 and are. swung inwards and then pressed against the sole by a lever 240 having teeth 241 gearing with fixed screw-threads 238. The lever 240 is pivoted to a sleeve 234 connected to the clamps by a draw-bar 223, and is locked against retraction by a pawl 249 engaging an adjustable stop carried by the lever. The final heavy pressure of the clamps 217 is obtained by rotating the sleeve 234 by the handle 240 about the thread 238 so that the teeth 241 act as a nut. The sleeve 219 moves with the pivots of the clamps 217 and engages a pawl 261 retracting the rack 258. When the shoe is firmly clamped the jack is swung downwards, its counterweight 172, Fig. 4, operating a slide 124 engaging a switch cam 120, Fig. 7, to reverse the grippers for the other shoe of the pair. The toegripping mechanism is swung about an axis 101 by an arm '103 carrying the switch cam 120. An arm from the shaft 101 is connected by springs to corresponding arms on the axes of the side-gripping mechanisms, so that these take up a position corresponding to that of the toe-gripper. The toe-gripping mechanism may be tilted for adjustment about a pivot 110 bv a hand-wheel 111, Fig. 4. Thumb-nuts are provided for lateral adjustment of the grippers. The whole jack is rotatable in the pivoted head 173, Fig. 22, so that after lowering it may be swung about the forepart of the last to position between the heel and toe wipers. In this position, the jack is steadied by a latch 177 engaging a fixed slot. After wiping, the shoe is released from the jack by depression of a pedal, which simultaneously trips the pawls holding the heel post 207 and the clamps 217, 253.