Patent GB-238596-A (GB)
Title: Improvements in or relating to mechanism for shaping the heel ends of shoe uppers off the last
IPC: A43D8/00
Filed: 1924-05-19
Abstract: 238,596. British United Shoe Machinery Co., Ltd., Gouldbourn, J., and Ricks, F., (United Shoe Machinery Corporation). May 19, 1924. Uppers, machines for.-A machine of the general type described in Specification 206,175 for marginally flanging the heel end of a shoe upper off the last by moulding it on a form is provided with means to position and clamp in place an insole before the form is moved to moulding position and with means for gripping the upper towards the toe end and drawing it tightly about the form. As in the prior Specification, the machine is of the twin type and each mechanism may be set in motion by depressing a treadle 28 on a pivot shaft 29. The form 54 is movable about a pivot shaft 57. Also pivoted on the shaft 57 is a rod 503 the upper end of which is forked to embrace a bracket 507. A sleeve 509 is slidable on the rod 503 against a spring 511 by means of a link 517 and treadle 515. Pivoted to the sleeve 509 to swing laterally thereof is an arm 553 which carries at its upper end a clamping plate 579 held downwardly by a spring. When the arm 553 is swung into parallelism with the sleeve 509 against the action of a spring plunger 555 a bracket 561 on the sleeve is engaged by a tongue 559 on the arm and an apertured boss 563 is positioned over a short rod 565 on the form carrier 56. When the sleeve 509 is lowered by the treadle 515 the plate 579 clamps the insole upon the form and the boss 563 passes over the rod 565 locking the arm 553 to the form carrier 56 so that the carrier, arm, and sleeve can be swung in together to moulding position. The sleeve 509 is locked in the position to which it is lowered by means of a spring-pressed cam 521, which may be released by a hand-grip 531 or automatically, when moulding is completed and as the tacker-head, described in Specification 206,437, is moving into place, by a cam-operated lever 533 striking a tail 525 of the cam 521. When so released the sleeve rises, freeing the arm 533 from the carrier 56, and is swung out to starting position by a, cam-operated lever 539 striking a face 543. The front upper portion of the form carrier 56 is provided with a boss 601 in which is vertically adjustable a bracket 605. This carries a horizontally-adjustable bar 612 having pivoted to its forward end a forked member 615, one arm of which carries a pad 627 adapted to engage an upper, the toe end of which has already been moulded in a machine such as is described in Specification 206,438, just in rear of the tip line. The other arm carries a curved lever 629 provided with a jaw 631 to co-operate with the pad 627 and connected by a link 633 to a bellcrank lever 635, 637 adapted to be rocked by a rod 641 and treadle and to be locked in position by a pawl 638. The member 615 is held in rearward position by a threaded pin 621 and spring 625. The lever 629 carries adjustably a hooked finger 645 adapted to position the forward end of the insole and hold the insole slightly bent and so under tension with its rear end pressed against the upstanding margin of the heel end of the upper. In the operation of the machine, an upper having its toe end moulded is threaded upon the form 54. The treadle operating the rod 641 is then depressed, first closing the jaws 631, 627 on the upper and then swinging the member 615 to stretch the upper forwardly. The insole is then positioned by means of the finger 645 and is clamped in place by the plate 579 on depression of the treadle 515, the arm 553 having first been swung into parallelism with the sleeve 509. The form 54 and arm 553 are then swung into position for moulding. When this is completed the lever 533 releases the cam 521 and the sleeve 509 rises and is returned to starting position by the lever 539, the arm 553 being swung laterally by the plunger 555 to make way for the tacking mechanism. The tacking mechanism is similar to that described in Specification 206,437. In a modification, the clamping jaws 631, 627 may be replaced by prongs adapted to engage the lowest pair of eyelet holes in the upper.