Patent GB-308628-A (GB)
Title: Improvements in or relating to the pulling-over of veldtschoen or the like
IPC: A43D113/00
Filed: 1927-11-22
Abstract: 308,628. British United Shoe Machinery Co., Ltd., and Bates, A. Nov. 22, 1927. Pulling-over,-Relates to machines for pulling- over the uppers of Veldtschoen, of the kind described in Specification 17172/12, and consists in the provision of mechanism (1) moving the tread rest independently of the pincers (2) pivotally supporting the side pincers in their pulling movement, to prevent them binding in their guides (3) moving the tread rest heightwise of the last to form a toe-pocket in the upper, and (4) anchoring the stretched upper by a fastener driven into the toe end of the last near its bottom. The wide toe pincer has its gripping faces maintained substantially parallel to the last bottom, and so formed as to exercise little grip at the centre. The machine is operated by an eccentric 12 on a power shaft 14 driven half a revolution at each depression of a clutch treadle. The eccentric actuates a lower 11 resiliently connected to a link 92 actuating a frame 10 which moves downwardly to cause the pincers to stretch the upper heightwise of the last. To vary the heightwise upper stretching pull, the spring 80 forming the resilient connection, is provided with an adjusting means comprising a handle or foot lever 86 carrying a pawl 87 engaging teeth on a rod 89 pivoted to the end of the lever 11, the link 92 being pivoted to a rod 90 on which the spring is threaded, the spring abutting against a nut on the rod 90 and a block linked to the handle 86. The upper jaw 18 of the toe pincers is pivoted to a rod 20 slidable in a bore in a fixed cross shaft 22 and engaging, with slight lost motion at a slot 37, the. frame 10. The lower jaw is pivoted to the upper jaw and is actuated by a link 41 having a lost motion connection with the frame 10, a spring 39 connecting the junction of the jaw and link 41 with the rod 20, This spring normally maintains the jaw 18 in contact with a stop 24 carried by the tread rest 16. The tread rest is operated by levers 26 resiliently connected to a lever 30 operated by the lever 11, an adjusting nut 35 determining the rearward thrust given to the last. The side pincers are guided at their upper ends by links 51, to prevent the rearward movement of the last causing the pincers to bind in their guides.. The side pincers have serrations on their gripping faces in both directions. The toe pincer, preferably, has a plain centre with serrations at right angles to the length of the last on its side portions only. In a modification, thecentral rear part of the lower jaw may be cut away. When the stretching of the upper is complete, the operator releases a latch 72 provided with a hand piece 67, allowing a driver arm 68 to actuate a driver bar 61 driving a tack through the upper into the toe end of the last near its bottom. The driver bar is retracted by a roll 71 on an extension of the level 30 as this returns to starting position. A projection from the toe end of the tread rest may limit the descent of the lower jaw of the toe pincer to position the tack delivery orifice. In a modification, the down-draw of the toe pincer may be definitely predetermined, to ensure the tack passage being at the correct height when a pull is completed. The anchoring tack may be removed during the sewing-on of the sole by a machine such as that described in Specification 4058/12.