Patent GB-1491748-A (GB)
Title: Lasting machine
IPC: A43D21/00
Filed: 1975-04-01
Abstract: 1491748 Lasting shoes, &c. INTERNATIONAL SHOE MACHINE CORP 1 April 1975 13245/75 Heading A3B In a side-lasting machine somewhat similar to that of Specification 1378631 in which side lasting straps 160, Figs. 10, 13 are engaged with the upper 192 of an inverted toe-lasted shoe assembly improved application of cement through nozzles 228, Fig. 13, at the junction between the upper and the insole 190 is obtained with the flexible junction 224, between the rigid top 160a and flexible lower parts of the lasting strap, below instead of above the bottom of the insole. The shoe assembly is mounted on a support 64, Fig. 1, raised by a pneumatic servo 208, Fig. 3 to the lasting position, a pneumatic servo 36 (see also Fig. 1) securing fastener to raise a toe support 42 and maintain the shoe assembly resiliently in position. As the toe-lasting straps 160, Fig. 10, 13 are further biased towards the shoe assembly by increasing energization of pneumatic servos 146, 168 following completion of a cementing operation the shoe assembly is tilted down at its toe end by pivoting movement of the last on a last pin 20, Fig. 1, 3 against the resilient biass of the toe support 42 and its servo 36, thus enabling the rigid top segments 160a of the lasting straps 160 to move inwards and complete the side lasting operation. The machine includes a heel clamp 182 and heel lasting wipers 184. Before commencing a lasting operation, the machine operator pivots the support 64, Fig. 1, left or right about a pivot pin 16, Fig. 3, by energizing a servo 58, Fig. 4, according to whether a left or right shoe is to be lasted. Two cam wings 50, 50 cooperate with an adjustably positioned stop 52 to limit the pivoting movement. The servo 208 raises two support 64, &c. and a servo 218 is energized to pivot two arms 214 so that brake plates 212 grip a fixed brake plate 210 and lock the support 64 vertically. The lasting straps 160, Figs. 10, 13 and lasting tools 65, Fig. 1 as a whole are aligned with the left or right shoe on the support 64 by energizing a respective servo 90, Fig. 6, to pivot a housing 100, Fig. 7 about a vertical pivot pin 102, Fig. 6, on a slide 84. A bracket 112, Fig. 7, is adjustable in a concave track 110 by turning a handle 120 to move the lasting tool &c. parallel to the shoe assembly, and carries at each end arms 122 Fig. 1, connected to the associated tool assembly 65. Adjustment of the tool assembly relative to the bracket 112 is effected by turning a handle 136, to move the tool assembly, &c. left or right with respect to the shoe assembly. The slide 84 carrying the pivot pin 102 Fig. 6 is movable in a frame 72 parallel to the shoe assembly by turning a handle 88. The frame 72 is movable by a pneumatic servo 68 left or right of the machine; viz. to carry the lasting tools 65, &c. towards or away from the workpiece. In use, the various hand adjust controls 52, Fig. 4, 88, 120, 136, Fig. 1, are pre-set by the operator according to the dimensions of the shoe to be lasted. The various servos 58, 68, 90, &c. are then effective to position the lasting tools 65 adjacent each side of the shoe assembly, pivoted about their respective pins 102, to the correct angular alignment relative to the main axis of the shoe assembly.