Patent GB-634489-A (GB)
Title: Improvements in or relating to machines adapted to press soles upon shoe bottoms
IPC: A43D25/06
Filed: 1948-01-24
Abstract: 634,489. Sole-attaching press. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). Jan. 24, 1948, No. 2193. Addition to 564,547. [Class 17 (i)] The gauges of the machine described in the parent Specification are arranged automatically to position the sole centrally on the pressure pad - with the ball line always at the same point lengthwise of the pad, on depressing a starting treadle. The toe and breast line gauges are moved longitudinally to engage the sole and shoe at the same position irrespective of variations in their size, such movement also correctly positioning the toe and last abutments and the mask plate lengthwise of the shoe. The hydraulic power system which operates the gauges is modified also to assist the operator in depressing the treadle to move the gauges. Ballline gauges 106, 108, Fig. 4, mounted on arms 96, 100, are moved to engage the sole by engagement of a block 84 by a slot 86 in a slide 88. Toe-end gauges 112, 113 are pivoted to a member 114 a stem 115 of which is pivoted at 118 to a plate 122 which has a loose fit in guides 128 in a cover plate 130, so as to allow limited lateral movement, and the plate 122 is locked against a hardened plate 129 by cam levers 132, when the gauges have located the sole. A shoe toe-end gauge 123 is attached, in a manner permitting lateral adjustment, by a screw 124, to a slide 125 which is longitudinally adjustable relative to the gauges 112, 113, by a screw 126. A link 134, Fig. 3, connects the cam levers 132, which are pivoted eccentrically to the plate 122, to a rock shaft 136, an arm 140 fixed to which is connected by a link 142, lever 144 and a link 148 to an arm 150 of a lever fulcrumed at 152, the other arm 153 of which has a pin 154 held down in a slot 155 of the rod 156 by a strong spring 158. The slide 88 is connected by a similar rod and link system 160, 162, 164 to a lever 166 having a projection 168 abutting a projection 170 on the rod 156. Depression of the rod 156 moves the rockshaft 136 to advance the toe gauges to contact and position the sole, this movement varying according to the size of the sole and determining the amount of movement of the other parts operated by the rackshaft 136. The projection 170 allows a spring 220 to move the slide 88 to advance the ball line gauges to engage the sole. A mask plate 234, normally held retracted by a spring 236, is advanced a distance determined by a lever 244 attached to the rockshaft 136. Sole gauges 376, with shoe gauges 400 adjustably mounted above to engage the breast line, are fixed to bars 378 pivoted at 380 to arms 382, 384, which are pivoted at 386, 386<SP>1</SP> to a member 388 and engage the sole and shoe when advanced by a slide 412. The lengthwise position of these gauges is determined by the position of the toe gauges since the member 388 is pivotally mounted at 392 to a slide 394 moved by a lever system 434, 440, 446, the latter having a pin and slot connection to the lever 150, which moves an amount determined by the toe gauges, so that the gauges 376, 400, normally held retracted by a spring 442, are always positioned on the breast line of the sole. The mounting of the gauges 376, 400 is such as to allow limited relative lateral movement against control springs. The movement of the rockshaft 136 through another arm fast on it also adjusts stops 330, Fig. 4, so that the bails 332, 360, on which the toe and last abutments 334, 362 are mounted, are positioned correctly lengthwise of the shoe. The machine is fluid operated by a single pump 10 for the turn shoe positions and has a timing valve so that all operations are automatically carried out in sequence after' two depressions of a treadle 176, Fig. 8. In operation, a sole is placed with its heel under a flexible cover plate 714 with the ball line adjacent the gauges 106, 108, which are held retracted by springs. The treadle 176, Fig. 8, is depressed and takes up lost motion in a pin and slot connection between the rods 174, 156 and operates a valve 586 through a piston rod 622 to depress the rod 156 by power and to advance the toe and ball-line gauges which are locked in position by a button 222 engaging a block 157. The movement produced in the rockshaft 136 also positions correctly lengthwise of the pad box the breast line gauges and heel plate 714, the mask plate and the toe and last abutments. The breast line gauges are advanced by the slide 412 to engage the sole and a shoe is then placed in position. If the sole has become distorted so that the heel of the shoe is not directly over it, depression of the shoe against inclined surfaces 402 will cause the sole gauges 376 to move the sole widthwise a limited amount. When the treadle is released, the rod 174 being fixed, a dog 194 is forced out by a cam surface so that a dog 200 engages a rod 204, which on a second depression of the treadle, will operate a valve 544 through levers 636, 642, 646 to set in operation the power pressing operation. The bails 332, 360 are first depressed and then a piston 682 releases the button 222 so that the gauges are withdrawn by their springs before final pressure and inflation of the pad 232. The parts automatically return to their initial positions. A manual push button 226 is provided to release the gauges at any time if desired or, if used during the pressing operation, to release the pad and bail pressure.