Patent GB-370495-A (GB)
Title: Improvements in or relating to the heel seat lasting of boots or shoes
IPC: A43D21/12
Filed: 1931-01-10
Abstract: 370,495. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. and BATES, A., Union Works, Belgrave Road, Leicester. Jan. 10, 1931, No. 892. [Classes 17 (i) and 17 (ii).] Lasting.-Relates to improvements in machines, and with shoe-making by operations involving the use of machines, for heel seat lasting comprising heel seat lasting wipers and gang fastener inserting devices for securing in position on the heel seat by a series of fasteners, the upper held thereon by the wipers, and consists in providing the machine with means for completing the side-lasting toeward of but near the heel breast line and with means for trimming the welt ends, and in deferring the lasting of the rear portion of the shoe until after the inseaming operation. The fore-part of the shoe may be lasted in the machine described in Specification 358,880, and the shoe then presented to a combined welt sewing and side lasting machine of the kind described in Specification 313,977, [Class 112, Sewing &c.]. For completing the lasting and trimming the welt, the improved machine comprises heel end wipers 7 with upstanding shoulders 9 engaging grooves in wiper carriers 11, this mechanism being housed between upper and lower guide plates 3, 5. The carriers 11 are cam-actuated by links 19 and are formed with slots 13 housing rollers mounted on pins fixed to the guide plates. The inner corners of the wipers slide along a V-shaped block 21. The working edges of the wipers are bored at 23 for tack driving, the group of tackers for each wiper being carried by a bracket 27 secured to the wiper. The bracket is provided with a handle 29 for adjusting the wipers for shoes of different sizes, the handle being provided with a latch engaging teeth 31 on the wiper carrier, for holding the wiper in adjusted position. For completing the side lasting forward of the heel breast, members 57 are pivoted to blocks each sliding in a guide formed in an outward extension of the forward end of the heel end wiper. The block is adjustable along the guide by a knurled head 51 and is urged inwardly by a strong spring 41. The forward end of the member 57 is urged inwardly by a spring plunger 61. To each block is also pivoted an arm 65 carrying a welt trimming knife 63 actuated by a link 67, a pin on which engages a short slot 71 in the plate 3. The member 57 is formed with a rising bevel 113 merging into a flat face 115 which forms a shearing couple with the knife. A supplementary tacking device is provided for each member 57. The tack nozzle 81 is urged downwardly by a spring but supported by a pin 95 engaged by a lever 97, the other end of which slides along a broad sloping cam secured to the guide 3. To adjust the position at which the tack is driven, the tack driver guide is carried by a stud 117 supported by a tube 119 externally threaded to engage a bearing 75 mounted on the bracket 27. Rotation of the head 123 adjusts the driver widthwise of the shoe. The driver guide also has an arm 125 slotted to engage between heads 129 on a stem threaded into a pin 131 supported in ears upstanding from the bearing 75. Rotation of the heads swings the driver guide about the stud 117 to vary the position of the nozzle 81 longitudinally of the shoe. Specifications 191,477, 213,594, 235,286, 280,677, and 316,025, [all in Class 17 (i), Boots and shoes, Apparatus for making &c.], also are referred to.