Patent GB-465267-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/12
Filed: 1935-10-04
Abstract: 465,267. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation) Oct. 4, 1935, No. 27378. [Class 17 (i)] Bed - lasting.-Relates to machines of the general character described in Specification 355,817, and comprises detail improvements rendering the machine particularly suitable for operating on footwear on wooden lasts. The shoe is positioned lengthwise by positively limiting the approach movement of the heel clamp towards the shoe, and causing the shoe support to move towards the heel clamp by spring action released by the movement of the heel clamp. The last pin can be tipped laterally, between stops, when operating on rights and lefts, to ensure that the bottom face of the toe end of the shoe is parallel to the plane of the toe wipers. The supporting plungers for the heel-end wipers are carried by an equalizing lever which itself is spring-supported, to facilitate lateral tipping of the heel wipers. A yieldingly mounted toe band arranged to clamp the upper and to upwipe it at the toe is extended to upwipe the upper rearwardly of the toe end, and at these locations rolls are provided for laying the upper margin over the insole. An expanding presser member is arranged to press the margin of the insole against the last and to co-operate with the toe wipers as a retarder, and a further member is arranged to clamp the upper upon the toe wipers before the last is depressed, so as to exert an upward pull on the upper. Toe gauges are provided for positioning the toe end of the shoe laterally. The last pin 2, Fig. 1, is carried by a post 8 which is vertically adjustable in a slide 12 at the upper end of the spring-raised slide 4. The heel-lasting mechanism comprising wipers 22 and heel band 24 is carried by a slide 26 which is moved towards the shoe by a spring when a latch 30 is tripped by the operator. The extent of such approach is restricted by washers, not shown, on guide rods 28 for the slide. The slide 12 is then moved rearwardly, to engage the heel end of the shoe against the heel band, by means of a slide 44 in which it is adjustable, Normally, the slide 44 is held to the left, against the action of a spring 80, by a latch 86. As the slide 26 approaches the limit of its movement to the left, a screw 92 on it trips the latch 86, so that the spring 80 moves the slides 44 and 12 to the right. The spring 80 is stressed by movement of the slide 26 to the right at the end of an operation on a shoe. The heel band, Fig. 4, comprises a leather strip 108 secured to the usual chain of links 98 by countersunk screws 110, and a second leather strip 112 secured detachably to the strip 108, as by press fasteners 114, 116. To obtain parallelism of the toe end of the shoe bottom with the plane of the toe wipers, the last pin 2 is carried by a slide 122, Fig. 1, which is adjustable in a curved guideway 126 on the post 8. The extent to which the pin can be tipped laterally is determined by two stop members 128 which are adapted to engage the sides of the last and are adjustable simultaneously by a handwheel 134. The heel wipers 22 are carried by, and operated by movements of, a plunger 140 mounted for sliding and turning movements in a holder 142 carried by a spring- raised plunger 156 which normally holds the wipers above the plane of the shoe bottom. The wipers are depressed to operative position by downward movement of a carrier 166 having a screw 170 to engage the top of the plunger 156, arms 172 to engage the wiper plates and tip them laterally of the shoe, and a presser foot 174 to engage the heel end of the insole. The wiper plates are supported below by plungers 160 resting on the arms of a centrally pivoted lever 182, Fig. 7, so that tipping of the plates is facilitated. The lever 182 is supported by a spring 188 to permit depression of the wipers. The toe band, which upwipes the shoe upper as the shoe is depressed, consists of an inner strip 240 of celluloid and an outer strip 241 of leather, and is flared outwardly; Fig. 22, so that its edge only engages the shoe upper. It is held removably in slots in a pair of end blocks 208, Fig. 14, which are controlled by a spring and are simultaneously adjustable by a hand wheel 238, and in a series of slides 212 which are independently movable and are pressed inwardly by a spring 214. The toe rest 244, Fig. 14, is mounted to swing forwardly to an adjustable extent, as the shoe is depressed against it, in order to pull the upper forwardly at the toe end. The toe wipers comprise end wipers 266 moved yieldingly towards the shoe by a carrier 280, Fig. 10, side wipers 268 carried by arms 270 and closed on the shoe by racks 300 acting through levers 304, and pairs of rolls 316 for wiping the upper margin rearwardly of the wipers 268. Each pair of rolls is carried by a holder 322 pivoted by a pin 324 on the adjacent side wiper 268, and is arranged in advance of the side wiper. The levers 304 operate the end wipers 266 through lost motion links 310. The toe presser foot 336, Fig. 1, which cooperates with the heel presser foot 174 in depressing the shoe is carried adjustably by an arm 338. Swinging movement of this arm to position the presser foot above the work is arranged to start the power operation of the machine, in the course of which the presser foot is carried down to engage the work. Also carried by the arm 338 is a clamping device arranged first to engage the insole close to the foot 336, and then to be moved outwardly to press down the margin of the insole. This device consists of an end member 350, Fig. 19, and pivoted side pieces 352, the whole being held downwards yieldingly. At the beginning of the movements of the toe wipers, the clamping device is moved forwardly bodily, and the pieces 352 are swung outwardly, so that the device is in position to co-operate with the wipers as a retarder, Fig. 22. Also carried by the arm 338 is a clamping member 407 of horse-shoe shape mounted adjustably for rocking movement laterally of the shoe and arranged to clamp the upper upon the wipers, while the latter are moving in, so as to impart an upward pull to the upper. A short forward movement is imparted to the member 407, to make way for the advance of the device 350, 352, by lost motion linkage to the operating mechanism of the said device, this mechanism being actuated from the mechanism for imparting closing movements to the toe wipers. The toe end of the shoe is positioned laterally by two gauge members 488, Fig. 9, adapted to receive equalized swinging movements towards or from each other by gear sectors 492 and urged together by a spring. The gauge members are withdrawn from contact with the shoe, so that they shall not interfere with the clamping of the upper by the member 407, as soon as the power operation of the machine is started. To this end, movement of the arm 338 to start the machine is arranged to move a rod 534, Fig. 9, connected to a latch 542. Tripping of the latch allows a spring 550 to swing a bracket 496 in a direction to move the gauge members away from the shoe.