Patent GB-191420118-A (GB)
Title: Improvements in or relating to Machines for Cutting or Dieing-out Leather and similar Material.
IPC: A43D27/00
Filed: 1914-09-24
Granted: 1915-10-25
Abstract: 20,118. British United Shoe Machinery Co., [United Shoe Machinery Co.]. Sept. 24. Cutting-out apparatus.-A machine for cutting or dieing-ont heel-lifts &c. from leather &c. comprises a base 1 having an arm 3 in which slides a plunger 7 adjustably carrying at its lower end a cutting-block 9, the plunger and block being adapted to be reciprocated by means of a connecting-rod 23 operated by an eccentric reduced portion 27 on the main shaft 29; at each reciprocation, the plunger is partly rotated by means of a pawl 17 adapted to engage a ratchet-wheel 15 on the plunger; or the rotation may be produced manually at intervals by means of a pawl and ratchet-wheel. A die 31 is mounted on the frame, beneath the cutterblock, in a holder comprising a base 39 having thereon a bar 41 and an adjustable clamping- member 43, and four guide-posts 47 carrying springs 51 for supporting the upper member 49 of the holder. A stripper-plate 53, corresponding to the die in use, is slidably mounted on the .member 49 and is removably held in place by a spring-pressed pin 55. Two guide-bars 59 are mounted on the upper member of the holder, one being adjustable by means of bolts 60 and holes 62 for different widths of material. The material is fed forward intermittently by means of front and rear feed-rollers 61, 63 and 65, 67 respectively, the lower rollers being connected by sprocket-wheels and a chain 77, and the upper rollers being driven from the lower by gears 73; the lower rollers are driven intermittently by means of a rack-bar 89 driven by a crank-pin 91 carried by a block 93 adjustable in a groove 95 in a disk 97 which is adjustably fastened by bolts 99 in slots 101 in the disk to a sleeve 103 on the main shaft. The lower end of the rack-bar engages a pinion 89*, Fig. 9, loose on the shaft 79 of the front lower roller, and connected to a carrier 81 carrying pawls 83 adapted to engage a ratchet-wheel 87 fast on the roller shaft. The first cut from the strip of material is so arranged that only just sufficient material is left at 100. Fig. 5, to prevent breakage thereof ; correct feeding to ensure this comprises a gate 107 adapted to prevent insertion of the strip except at predetermined intervals. The gate is carried by a stem 109 from an arm 113 mounted on a rock-shaft 115, and is pressed downwardly by a spring 117 towards the table 119 on which the strip is supported as it is fed into the machine. The gate is raised at intervals through a second arm 121 on the shaft and a cam 123 adjustably fastened on the main shaft. Adjustment is facilitated by a pointer 127 moving over a scale, and adjustment of the cam 123 is facilitated by a stationary pointer 129 and a scale on the cam. A friction brake may act on the shaft of the lower front feedroller to prevent over-running. A stationary guard or guide 147 is located in front of the gate to guard the operator's fingers and to guide the strip. The rollers are cut away adjacent to the gate to ensure that the strip is gripped by the rollers as soon as the gate rises. To enable wedge-section strip to be dealt with, the shafts of the upper rollers may be capable of tilting, by being mounted in spherical bearings; a guide 163 prevents swinging round of the strip as it passes through the machine.