Patent GB-228578-A (GB)
Title: Improvements in or relating to shoe-upper lasting machines
IPC: A43D21/02
Filed: 1923-08-03
Abstract: 228,578. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). Aug. 3, 1923. Machines using continuous wire.-A step-bystep lasting machine comprises stapling mechanism driving staples through the lasted upper and into but not right through the sole. An overlaying device 212, Fig. 2, is reciprocated in a path inclined to the sole surface by a cam-operated lever 175 connected bv a link 181 to a slide 170 carrying the bulk of the staple forming and inserting mechanism. While the upper is being overlaid, a work rest 150 engages the lip. This rest is formed with cavities for clenching the staple which is driven when the device 212 has reached its final position. The stapling mechanism comprises a fixed anvil 160, Fig. 4, and wire cutter 182, the remaining part of this mechanism being carried by the slide 170. Wire from a roll (not shown) passes to feed rolls 302, 304, Fig. 1, driven by a pawl and ratchet gear operated by a lever 310 cam-operated from a gear-driven shaft 320. The wire passes from the feed rolls to a guide tube 322 and thence through slots in blocks 184, Fig. 5, behind the anvil 160. As the slide 170 advances, a cutting block 180 co-operates with the cutter 182 to shear off a length of wire, and outside formers 172, 174 bend the legs of the staple about the anvil 160. The shank of the staple is shaped by a member 190, the operative face of which may be straight or curved. When the staple is formed the block 176 carrying the outside formers descends to convey the staple to driving position. the legs of the staple being guided by a plate 198, which has advanced to alignment with the anvil 160. The staple driver 204 is actuated by a lever 250, Fig. 1, provided with a latch 274 adapted to be engaged by a shoulder 272 on a link 264 normally pressed outwards about its pivot 266 by a spring. The pivot 266 is carried on a slide reciprocated vertically by a cam, the arrangement being that the link 264 is depressed to retract the staple driver during the advance of the slide 170. When the slide reaches its final position a cam surface 280 on the link 264 contacts with a stop, the latch is released, and a stout spring 260, Figs. 1 and 4, drives the lever 250 counterclockwise to drive the staple. The lever 250 is provided with a stop 298, Fig. 4, provided for engagement with a hard fibre buffer on a screw button 292. The reciprocation of the block 170 carrying the outside formers is effected by a lever 222, Fig. 1, pressed against its operating cam by a spring and connected by a link to a sleeve 230 spring- pressed away from the lever. On the sleeve is adjustable a hub 234 to which is pivoted a link 236 connected to a lug 238, Fig. 4, on the block 176. The block is thus resiliently moved in both directions. The limits of upward and downward movement of the block are adjusted by screws 214. 216 co-operating with a lug 218 on the block so that the staple forming and staple delivering positions of the members 172, 174 may be correctly set. Specifications 800/98, [Class 17, Boots &c.]; and 15953/15 are referred to.