Patent GB-712198-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1951-11-24
Abstract: 712,198. Heel-end shoe-upper-conforming machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Nov. 24, 1952 [Nov. 24, 1951], No. 27595/51. Class 17(1) In a machine for conforming the heel-seat portion of an upper to an insole having an upstanding lip at its heel end, i.e. of the so-called sewed seat welt shoes; a holddown engages the insole on a last support of a slide, and a heel band engages the shoe, first to force it forward, so that the holddown engages the insole lip at the heel end, and then to clamp the upper against the last up to the shoe waist. Heated wipers then act to wipe in the upper at the heel end. A partially lasted shoe is mounted for vertical movement by a rod 24, on a slide 8, Fig. 1, which is movable horizontally. On rearward' movement of the slide 8, the shoe heel engages a heel band 182, Fig. 9, attached to a heel band slide 190 which mounts a support 192 having two chains 200 pivoted at 202 thereon. A cam face 254, Fig. 1, engaging a roll 252 acts through a lever 248, link 146, arm 244, rod 236, arms 232, 226 and rockshaft and rack 222, 220 (not shown) to advance the slide 190 to 'force the shoe forward until it is arrested by engagement of the insole lip with a holddown 87, at which point a spring 240 on the rod 236 yields. The,initial position of the slide is adjustable, by relative movement of the arms 232, 226, by engaging a pin 230 of the arm 232 in a different hole 228 in the arm 226. As the slide 190 advances, cam faces 260 on the heel-band supporting-arms 204, are contacted by rolls 258, connected to the pivoted chains 200, to close the normally open band 182 and clamp the upper. The clamping can be adjusted by initial positioning of the roll 258 by a knob 272. A pair of wipers 130, Fig. 4, are connected by a pivot stud 132 to a small slide 134 in a plate 136 secured to a main slide 138.' A spring 144 is interposed between the slides 134, 138. Links 150 on the wipers 130 are connected to slides 152 in the plate 136 so that the initial position of each wiper about the pivot 132 can be independently adjusted by a knob 164 through bevel gears 158, 160. A cam track 142 engages a roll 140 on the slide 138 to advance it until the wipers contact the insole lip at the extreme heel end when the spring 144 yields and continued movement of the slide 138 causes the links 150 to swing the wipers 130 about the pivot 132. Supplemental wipers 168 as an extension waistwards of the shoe are adjustably mounted on the wipers 130 but may be held in an inoperative position by a latch 175. A heated cover plate is provided for the wipers. In operation, a shoe lasted at least at the sides of its shank is placed on the last pin and toe rest of the slide 8, which is moved rearwards until the heelband 182 is contacted, its position having been adjusted by the arms 226, 232, so that, on depression of a treadle 84, the holddown 87, which, if necessary, may also be adjusted in position as described in Specification 235,286, [Class 17(i)], contacts the insole forward of the rear part of the lip. The power cycle is then started by a member 88, the heel band slide 190 moving, first to force the insole lip against the holddown 87 and then to clamp the upper after which pawl and ratchet mechanism connected by a link 82 to the treadle 84 acts through a thrust collar 72 engaging a bar 26 on the rod 24 to force the shoe more firmly against the holddown. The wipers then act, moving first forwardly and then inwardly to be followed by increased upward pressure on the rod 24 to force the shoe against the wipers. During this increased pressure the holddown is allowed to yield vertically, when a spring 306 or a rod 300 is overcome and allows a rack 288 to move upwards.