Patent GB-539459-A (GB)
Title: Improvements in or relating to machines suitable for use in the conforming of an upper to the shape of a last
IPC: A43D13/00
Filed: 1940-03-09
Abstract: 539,459. Lasting machines. UNITED SHOE MACHINERY CORPORATION. March 9, 1940, No. 4445. Convention date, March 10, 1939. [Class 17 (i)] A heel-seat lasting-machine of the kind described in Specification 473,197 is modified to adapt it to drive fastenings of the kind described in Specification 253,117, [Class 17 (iii)], of fibrous material. The upper is lasted by power, the drivers are actuated to perform the function of awls, fibrous material is fed to loader blocks, the blocks are then advanced to sever the lengths to be inserted and position them below the drivers, the drivers then perform a second reciprocation to drive the fastenings to hold their upper margin in lasted position. Gauge members engage the heel end and the two sides of the heel seat and co-operate with a selfadjusting last support to position the heel seat in the proper plane for over-wiping. The last is supported by parallel links to allow the heel band to centre it transversely. The last is supported on a plate 396 having an opening through with a last pin 19 passes, the plate having arcuate nanges 398 to allow tip of the plate. A screw stop 406 may render a toe rest unnecessary. Lateral movement of the last is permitted by parallel links 412, 414 centred by springs, each engaging a pin 424 in one of the links. Lengths of fibrous fastener material 88 are wound on reels and passed round guides 328 and through guides in line with grooves in a cylinder 236 against which is pressed a rubber cylinder 240. The cylinders are driven by equal gears on their spindles, rotation of the rubber cylinder while it is separated from the other being prevented by a brake shoe 286 urged toward the cylinder by a spring 284, A spring 262 on a pivoted link 252 normally urges the cylinders together. The fastener material is fed by ratchet and pawl gearing actuated by a link 290 the end of which is adjustable along a slot in a bell crank lever 292 actuated by a cam. A cam-operated plunger 132 operates the loader block. This block is formed with teeth 98 gearing with a segment on a lever 102 actuated. by a plunger 114, co-operating with the plunger 132. When the loader block is advanced it severs the lengths of fastenings contained in the tubes 96 and carries them above tubes 52 to be driven into the heel seat at the next descent of the drivers. The drivers 64 are carried, at each side of the heel seat, by a slide 66, retained in a guideway in a block 62 by a spring plunger 70. They are reciprocated by cam-actuated slides 61 linked to a lever 80 urged downwardly by a spring 168 and allowed to fall twice during each cycle, once to form holes into which the fasteners are to be driven, and after the loader blocks have been advanced, to drive the fasteners. The descent of the drivers is limited by a stop 176 pivoted to the lever 80 and co-operating with leather washers 178. When performing their driving stroke the drivers are required to stop short of the distance they descend when functioning as awls by the length of the fastening. A spacing member 186 is advanced for this purpose by mechanism connected with the lever 138 the member being of U-shape to permit its advance to a position above the washers 178. The wipers 22 are provided with holes through which the fasteners are driven. To position the heel seat in the plane of the wipers a member 340 is supported by parallel links 346, 348 to position the shoe at the heel end, and a pair of members 342 to determine the heightwise position at the two sides of the heel seat. The lastmentioned members are geared to a spring- pressed plunger 370 to enable their distance apart to be adjusted to suit different shoes. These members yield to the advancing wipers, and are mounted on a hold-down actuated as described in the prior Specification.