Patent GB-561230-A (GB)
Title: Improvements in or relating to the conforming of shoe uppers to lasts or machines suitable for use therein
IPC: A43D13/00
Filed: 1942-11-05
Abstract: 561,230. Lasting machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation.). Nov. 5, 1942, No. 15585. [Classes 17 (i) and 89 (iii)] In a lasting machine for stitch-down shoes, upper gripping devices on opposite sides of a work support cause the upper to be pulled about the last and bedded into the'angle formed by the side 'of the last and a projecting portion of the sole, staples being then driven to hold the upper in position. The work support 58, Fig. 8, carries a heel rest 60 and a pair of toe end supports 66, 68. The work support is carried by upstanding links 50, 52, Fig. 2, to which are pivoted links 34, 36 connected by a pin 40 carried by a treadle rod 42, the pin engaging one of the links by a. slot to allow the links 50, 52 to remain parallel. The link 36 has an arm 90 adjustably linked to the link 50. The links 34, 36 are pivoted at 32, 38, so that as their adjacent ends are depressed, the work support is raised and moved heelwardly to tighten the upper about the heel end of the last, since at this time the toe end of the upper is held by the grippers. When the work support has been so moved a latch 106 holds it in position. The work support is provided with a toe-end gauge 74, Fig. 8, and toe side gauges 181, all engaging a sole secured to the last. Each of the grippers comprises an upper jaw 122, Fig. 1, urged to normal position by a spring 132, and a lower jaw 144 pivoted at 150 and moved to closed position by a link 152 actuated by a lever 156 and treadle rod 164 depressed by a treadle 166. The lower jaw has a rib 146 co-operating with a recess in the upper jaw, slip being, allowed when predetermined tension is reached. The grippers are held closed by a latch 198 urged to operative position by a spring 210. Adjacent to each upper gripper jaw is a clinching anvil 214, Fig. 5, for staples 238 driven by a. bar 300 actuated by the nose 348 of a lever 346. The stapling mechanism is carried by a bar .232 supported by a pivot 314 urged upwardly by a spring 322 and a roll 328 engaging a cam-slot 332 in a lever 336, Fig. 1, actuated by a rod 380 and levers 406.. The staples are urged to driving position by a spring 252, Fig. 5, retracted by a finger-piece 264. The lever 346 is urged to operative position by a spring 364, Fig. 1, but normally retained by a latch 368 tripped by an arm 342. of the lever 336. The grippers are released prior to the driving of the staples by a link 407 having lost motionconnection with a stud carried by the left-hand lever 336. The grippers, staple-inserting means and anvils are carried by plates 130 adjustable angularly and toward or from the shoe. These plates are pivoted at 456, Fig. 3, to plates 450 each pivoted at 448 and connected by a resilient link to a lever 478, the two levers being adjustable by a right-and-left screw 500. The outer end of each is adjusted by a link 462 secured by a pin 464 selectively engaging holes in the link. The levers 478 are each pivoted to one of two pins 488 on arms 490, 492 pivoted at the ends of a rod 518 and connected by a link 528. The arm 490 carries a roll 560 engaging a cam-slot in a lever 540 actuated by an arm on a shaft 386 connecting the levers 406. The camslot causes an inward movement of the plates 130, causing the anvils 214 to bed well in the angle between the last and the sole just prior to the driving of the staples.