Patent GB-410743-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D13/00
Filed: 1932-10-22
Abstract: 410,743. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., and BATES, A., Union Works, Belgrave Road, Leicester. Oct. 22, 1932, No. 29535. [Classes 17 (i) and 89 (iii).] Lasting.-The machine described in Specification 358,880 is improved by the provision of means for applying a binding wire about the lasted toe end and anchoring its ends by staples. The tramplers described in the prior Specification are substituted by grippers. Upper locating means engaging the edge of the toe cap are provided for facilitating correct positioning of the work. The wipers 21, Fig. 4, described in the prior Specification are grooved at their inner edges for the reception of a binding wire 113 positioned by the operator. Recesses 127 are cut in the inner edges of the wipers, and the upper faces of the wipers are bevelled downwardly to the edges of the recesses. Each of the wiper carrying plates 120 supports a pivot 119 for a pair of gripper jaws 117 holding the end of the wire, the upper jaw 117 being urged in a direction to tighten the binder by a spring 123 normally holding the jaw against a stop 125, and the jaws being urged to closing position by a spring 121. On each side of the shoe stapling mechanism is carried by a bracket 29, Fig. 3, pivoted at 31, and oscillated about this pivot, for advance to staple driving position and retraction therefrom by a rack 39 operated by a cam. A rod 33 rotatable in the bracket 29 carries guide links 51 for a pair of staple driver guides 55 further guided between flats 59 on the bracket and urged outwardly by springs 61 against stop screws 63. Each staple driver guide is urged downwardly by a spring 71 threaded on a rod 65 and bearing against the arm 51, the lower end of the rod being pivoted to the bracket 29. The lower side of the arm 51 normally abuts against a stop screw 75 threaded in an arm 133 secured to the rod 33, an upstanding arm 135 secured to this rod having a roll engaging a cam 137 having a drop for allowing the guides to enter the recesses 127, when a nose 129 on the driver engages the binding wire. The two staple drivers 79 on one side of the shoe are coupled by a leaf spring 81 and a dumb-bell bar 85 the central portion of which is surrounded by a sleeve connected by a link 87 to a driver arm actuated by a torsion spring tensioned by a strut 91 on rise of the bracket 29. A pawl released by a cam-actuated cable releases the driver arm when a staple is to be driven. The staples 104 are arranged on a strip 103 and urged along the strip by a spring-pressed follower 105 so that the end staple is in the driver passage. The staples have blunt ends and are splayed, the passage being correspondingly formed to retain the end staple until descent of the driver. The legs of the staples are close together at their upper ends so that they bind on the wire and do not necessitate fine adjustment of the driver stroke. The second sets of grippers each comprise a lower jaw 159, Fig. 9, resting on the wipers and pivoted to a bifurcated lever 163, pivoted at 165 and carrying bushes 180 slotted to engage a pin on a lever 175, the pin being urged to the outer end of the slot by a spring 189 threaded over a rod 185 passing through a trunnion member 183 engaging links secured to the bushes. The upper end of the lever 175 is pivoted to a slide 173 carrying the gripper closing roll 171, and its lower end is linked to a cam-actuated arm 195. The lever is urged outwardly by a spring 207 threaded over a rod pivoted to an arm on the lever and passing through a hole in an arm fixed to the frame. A screw stop 208 threaded through the lever 163 and engaging the frame determines the normal position of the grippers, which move inwardly against the spring 207 as the wipers advance, retaining their hold on the edge of the upper. The toe band 139, Fig. 4, is in two halves connected by a pivot 141 below the meeting edges of the wipers. Each half comprises three links faced with a strip of leather, the heel-ward links being pivoted to a toggle link 149, the other link of the toggle having a fixed pivot 153 and an operating link 155 actuated by a cam. The toe cap edgepositioning gauge comprises a plate 211 positioned just higher than the upper face of the wipers and between the two pairs of grippers 19, 23. The plate is carried by a bracket secured to the wiper carrier 120 and adjustable forwardly and rearwardly of the shoe by a nut 217 engaging a graduated stem 213 secured to the plate. The upper is pressed against the gauge by a resilient member 223, Fig. 10, which is lifted to allow positioning of the work by a cam 225 operated by an arm 229 connected by a cable to a treadle. According to the Provisional Specification, the staple carriers are arranged transversely of the shoe and the staples are twisted as they are driven so that they may straddle the binding wire.