Patent GB-555513-A (GB)
Title: Improvements in machine for finishing top lift edges
IPC: A43D95/16
Filed: 1942-02-26
Abstract: 555,513. Finishing heels. GROVES, W. W. (Lawson-Porter Shoe Machinery Corporation). Feb. 26, 1942, No. 2513. [Class 17 (i)] In a machine for setting the edges of toplifts of heels the heel is clamped between two members engaging the tread and heel seat surfaces respectively, and oscillating edge-setting irons are traversed about, the end and sides and breast. The machine is continuously driven ,the clamps being retracted from time to time to allow a finished work piece to be removed and a fresh work-piece positioned: The heel itself is stationary, and the operator may keep his hand on it. For top-lifts pear-shaped in plan one tool may set the whole periphery. The heel 50, Fig. 13, is clamped between a work-rest 81 of material such as that known under the Registered Trade Mark "Uskide" and a pivoted heel-seat engaging member having a rubber pad 55. This pad is carried by a sliding rod 48 urged toward the work by a spring 60 and moving with a rod 43 carrying a heel breast support 77. The rest 81 is carried by a rod 84 adjustable towards and away from the work by a nut 85. The heel seat pad is retracted at intervals for work changing by a cam-operated lever actuating a collar 270. The tools are carried by a box 156 secured to a sleeve 150 oscillated by a pinion 160 gearing with a segment 161, Fig. 11, oscillated from the cam-shaft 18 by an adjustable crank. The tool 101 for setting the breast edge is self-adjusting heightwise of the heel about the edge of the top-lift and is supported on a shank 216 clamped to an arm 220 linked to an arm on the shaft of the segment 162. The clamp is pivoted to a lever 246 co-operating with a cam 250 to withdraw the tool from the work when this is to be changed. An adjustable spring in a casing 234 urges the tool towards the work. The tool 100 for setting the back and sides of the toplift is in contact with an electric heating element 106, Fig. 4, and is retained on a stud 102 by a spring 104. The tool is adjustable along an arc-shaped guide in a head supported by a post 121, Fig. 13, having a guide 126 for vertical movement. The tool is adjusted in its arc-shaped guide by a lever 131, 134 actuated by a disk 135 on a sleeve moved endwise by a hand lever. The tool is urged toward the work by a spring 200, Fig. 14, connected to a worm 194 on a lever 191 pivoted to the box 156 and the post 121. To vary the pressure on the work the upper end of the spring is adjustable by rotation of the worm. To remove the tool from the work after a predetermined number of traverses a latch 290, Fig. 6, is pivoted at 291 to the box 156, the end of one limb being stepped to engage a flat on the shaft of the rollers 126 and a pressed trigger 294 retaining this step in operative or inoperative position. A cam-operated lever284 is formed with two cam surfaces 285 and 303 cooperating respectively with the roll 127 actuating the sliding post 121 and a pin 300 on the latch. The cam 303 moves the roller inwardly as the roller in the rotation of the box strikes the cam. Later the cam 303 moves inwards, freeing the shaft from the step just before the pin 300 is engaged by the cam 285 to return the latch to starting position.