Patent GB-534898-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D13/00
Filed: 1939-09-18
Abstract: 534,898. Lasting machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Sept. 18, 1939, No. 26040. [Class 17 (i)] Relates to modifications in machines of the kind described in Specifications 355,817, 465,267, 475,127 and 507,490. The toe-wipers extend to the ball line and overlap the operative path of side wipers, which advance and retract before the toe-wipers are advanced and move in paths curved about axes extending heightwise of the shoe, with components of movement toe-wardly of the shoe to deal with the upper heel-wardly of the ball line. The toe-end wipers 64, Fig. 10, extend further heelwardly than in the machines described in the prior Specifications, and are heated. Each side lasting mechanism is supported on a bracket 136, Fig. 3, formed with a guide for a slide 140 to allow adjustment lengthwise of the shoe, arms 142 depending from the slides being linked to arms 146 slidable along rods.148 and adjustable by a hand lever with the aid of a scale. Each side lasting mechanism comprises a movable gripper jaw 170, Fig. 4, and a wiper 172, both supported on a carrier 174 movable to and from the shoe along a curved guideway so that near the shoe the carrier has a component of movement toe-wardly of the shoe. The movement is limited by a member 178 self-adjustable about a curved tongue and groove connection 183 as it contacts with the shoe. The movement of the side lasting mechanisms toward the shoe is produced by levers 184, Fig. 3, actuated by links 190 engaging levers 192 operated by toggle links 194 and a depending link 198 connected to a lever 210. This lever is urged downwardly by a spring 214 but is normally held out of action by a latch 216 actuated by complete movement of a knee pad 26, partial movement of which actuates the heel band, as described in the prior Specifications. The lever 210 may be raised, if it is desired to re-latch it, by a handle 226. The movable jaw 234, Figs. 3, 4, of each side gripper is actuated by a spring 274 threaded on a rod pivoted to the tail of the jaw and abutting against a U-shaped member 272 pivoted at 278 to a lever 282 actuated by a link 314 terminating in a hook co-operating with a pin 312 carried by a bell-crank lever 304 connected by a cable 302 with a treadle. A latch 286 co-operates with a stop 362 formed on the wiper carrier to maintain the gripper closed until the wiper advances. A lug 320 raises the link 314 to bring its hook into the path of the pin 312 as the mechanism is swung in towards the shoe, so that the first depression of the treadle closes the toe-gripper, as heretofore, and the second depression, after the inward swing of the side lasting mechanisms, closes the side grippers. The wipers are resilient, and may be adjusted by screws passing through their carrier and bearing on the wipers near their lateral edges. The wipers are positively operated by the levers 184, the gripper and abutment 178 being connected to the wiper carrier by a spring 330. Yield in the power operation of the wipers is allowed by a spring 344, Fig. 3, urging a wedge 358 beneath a roll 356 carried by the lower part 338 of a two-part link. connecting the lever 210 with a camactuated lever 336. The wedge is supported on a ball bearing 354.