Patent GB-296743-A (GB)
Title: Improvements in or relating to methods of and machines for inserting staples
IPC: A43D69/04
Filed: 1927-06-07
Abstract: 296,743. British United Shoe Machinery Co., Ltd., (United Shoe Machinery Corporation). June 7, 1927. Machines using continuous wire; work-supports.-A stapling machine adapted for the manufacture or repair of different classes of work includes means for turning the staple cross-bar through a certain angle so that it may lie in a predetermined position in the work, means for readily adjusting the height of a work - support, for operating on various classes of work, without varying the position of the clenching tip of the support relatively to the line of drive of the staples, and interchangeable work-gauges for different classes of work. As shown in a machine of the kind described in Specification 17439/05 wherein a staple is formed from wire with its cross-bar parallel to the front of the machine, the staple nozzle 140, Fig. 3, is provided with rifling 146 in the form of a pair of flutes adapted to rotate the staple cross-bar through an angle of 90‹. The flutes at the top of the nozzle merge into flaring grooves 148 to facilitate entry of the staples. For staples having curved cross-bars, the driver 18 has preferably a concave lower end 150. A horn 238, Fig. 4, having a clenching tip 240 is held on a horn post 222 by a split bracket 232 and handscrew 248. A stop-screw 252 threaded through the horn engages adjustably a vertical rod 250 mounted on the bracket 232 and constituting a stop. The screw 252 is held yieldingly in engagement with the rod 250 by a hook member 256 and a spring 260. Consequently, the horn may be readily adjusted vertically by loosening the hand-screw 248, without danger of the horn tip 240 moving from its alignment with the nozzle 140. The horn post is normally lowered by a spring 225 and is raised through a treadle 229, rod 230, and spring 231. The machine is provided with two different work-gauges either or both of which may be moved to inoperative position As shown, Figs 7 and 9, a slide 340 is adjustable to and from the nozzle 140 by a rack 348 and pinion 350 and is held in set position by a friction device. A shaft 364 mounted on the slide carries a pair of sleeves 367 one of which carries a sole-edge gauge 390 and the other a heel gauge 388 for the attachment of top lifts. The sleeves 367 are held inwardly by springs 378 and are each formed with a tapered tongue 372 to engage a tapered recess 374 in the slide 340. By moving a sleeve outwardly against its spring to disengage the tongue from its recess, the corresponding work gauge can be moved downwardly to inoperative position. Both gauges may be inoperative together, but only one at a time operative. By this construction, a gauge suitable to the class of work in hand is readily available. The guideway for the slide 340 is attached to the usual machine frame by screws. The machine modified as described may be used in carrying out a method of repairing turn-shoes. According to this method, the worn sole 412, Fig. 11, is skived to a feather edge 428, thus equalizing its thickness. An outer sole 430 channelled at 432 is then attached by a seam of staples 434 arranged in the channel with their cross-bars at right angles to the edge. Similarly the soles of new shoes :nay be attached only by staples with their crossbars at right angles to the sole edge. In a method of sole-laying prior to McKay stitching, Fig. 14, the sole is preliminarily attached by staples 528 driven at the tip-line, ball, and waist into the inner shoulder 524 of the channel 520 with their cross-bars parallel to the sole-edge. In this method the toe-end, if pointed, may be attached solely by a group of staples.