Patent GB-142931-A (GB)
Title: Improvements in or relating to lasting machines
IPC: A43D21/12
Filed: 1919-02-13
Abstract: 142,931. British United Shoe Machinery Co., (United Shoe Machinery Corpora.tion). Feb. 13, 1919. Lasting.-Consists in detail improvements in end-lasting machines of the type described in Specifications 22630/08, 25608/09, 106,297, and 106,298. The heel-clamping band, Fig. 6, is adjustable transversely of a supported shoe by a thumb-screw 80 engaging a yoke 74 guided by pins engaging slots. The yoke carries abutments engaging the wedge surfaces 40 which close the band on the heel, and adjustable springs 78 which apply a stiff pressure at the corners of the heel. The shoe hold-down 132, Fig. 10, carries a resilient finger 134 with a button detachably engaging a plate 136 supporting the sewing-rib. A plate 140 with a wedge surface 144 engaging the head of a stud 146 is pressed by a spring 142 to hold down the insole tip. This plate yields to the advancing wipers, but an inclined surface thereon engages the plate 136 and holds this down while the member 140 is being pushed back against the spring 142. The toe-rest 20, Fig. 4, is held in one of three positions in a holder 112 with a recess of are shape, by a spring-pressed pin 116, and in one of three transverse positions by a locking-red 114. The rest is raised by a slide 94 having a link 96 carrying a roll engaging a cam on the shaft 9, one end of the link being connected to the slide, by toggles 97, 98. The toe-rest is normally raised, being lowered by the cam for the unjacking operation only. To allow the binding-wire to be drawn into position round the toe., a treadle flexes the toggle to relieve momentarily the pressure of the wipers. The toggle may be straightened by an extension of this treadle, or is straightened during unjacking by studs 982 on a disk on the cam shaft engaging an extension of the link 98. The heel-lasting head is provided with a brake, for preventing rebound after unjacking, comprising a spring-pressed rod 45, Fig. 2, carrying a brake shoe 48 having a spring plunger 50 engaging an incline 53 fixed to the frame of the machine. The heel support comprises a U-shaped member 25 carrying the lasting-pin 26, and itself carried by a slide 24 moved longitudinally by a rack and pinion operated by a hand-wheel 27, Fig. 11. The lasting-head is secured in lasting position by a spring-pressed latch 42; and a catch 28 for the hand-wheel 27 is operated by a wedge on an arm 66, so that when the latch 42 is lifted to unjack the shoe, the carrier 25 is also freed. The last-pin 26 is raised by a rod 301 operated by a treadle 35 locked by a pawl on another treadle. An incline 33 engages a roller 303 on a rod connected by a spring and lever 30 to the rod 301, and lifts the last-pin farther as the slide 24 is forced rearwardly to press the shoe into the heel band. The toewiper carrying yoke 82, Fig. 5, is adjustable about a pivot 84, and has an eccentric lock 86. Spring pins, on members 821 on right and left screw-threads turned by a, hand-wheel 823, engage a tail 825 on the yoke to determine its position for right and left shoes. Pedals with adjusting-screws are provided for raising the toe wipers, and for depressing them to iron down the over-wiped materials. The heel wipers comprise rear-end wipers 176, Fig. 7<a>, hinged to carrier plates, side wipers 178 held from longitudinal movement by links 180 adjustably pivoted to the wiper cover-plate, and front wipers 182 pivoted to the side wipers and adjustable by thumbscrews 184. A last-spindle and toe-rest are carried by one of the standards of the frame, for pounding down the lasting-tacks..