Patent GB-191500920-A (GB)
Title: Improvements in or relating to Pulling-over or Pulling-over and Lasting Machines.
Inventor: ASHTON ORRELL
IPC: A43D13/00
Filed: 1915-01-20
Abstract: 920. Ashton, O. Jan. 21, 1914, [Convention date]. Lasting.-Relates to pulling-over or pulling- over and lasting machines of the type in which a substantial part of the forepart is gripped and worked over the last at the same time, as described, for example, in Specifications 7005/00 and 9793/08, as distinguished from lasting machines in which grippers work progressively round the shoe, such as those of the type described in Specification 14,453/97, and consists in an arrangement for lightly closing the side grippers and adjusting them along the edge of the upper until they engage and, if desired, straighten the tip seam, in means for effecting relative longitudinal adjustment of the side grippers, in improved wiper mechanism for lasting the toe, improved tacking-mechanism, and in improved means for engaging and supporting the last during the pulling-over and tacking operations. The invention is described as applied to a pulling-over and lasting machine of the type described in Specification 9793/08. and is designed for operation on turn-shoes. the tacking-mechanism being adapted to insert, say, eleven tacks, leaving the shoe ready for immediate presentation to a turn-shoe sewing machine. The side grippers are of substantially the same construction as those described in Specification 7247/01, but each is now provided on its front face with a feeler 40, Fig. 5, which, when engaged by the shoe in the initial presentation of the work to the machine, trips a latch 36 and enables the usual closing-spring 35 to close the grippers with a light grip on to the upper; the grippers on opposite sides of the shoe may be closed simultaneously or successively. The grippers may then be moved together towards the toe of the shoe, which is positioned in the machine in the usual way by the toe gripper 2, until a stop-face 54, Fig. 7, on the inner jaw of each gripper engages the toe tip seam, the jaws being formed with upwardly and backwardly inclined ribs to overcome the tendency of the upper to escape from between them. To effect this movement of the side grippers, each is provided on its rear edge with a slideway for a block 41, Fig. S, to which is pivoted a transverse block 42 located in a guideway in a rack-bar 44. These rackbars are adapted to be moved from a rock-shaft 45, which carries at one end a plate 46 adjustably connected to the shaft through a latch device 50, which is connected to the shaft by a pin 50<b> and to the plate 46 by the engagement of a stud 50<a> with one or other of a series of holes 46<a>. The plate 46 is connected through a rod 48 to a treadle, and the amount through which it can be moved to adjust the grippers towards the toe is determined by the engagement of stops 46<b> with a fixed pin 52. The plate also carries a spring pin 47 adapted to engage a locking-device 65, which holds the side grippers in the position to which they have been advanced ; the device 65 is carried by one of the side tacker arms, which, when swung inwards, releases the pin 47 and allows the side grippers to be returned to their normal positions. The mechanism above described provides. means for locating the tip seam to give the required length of tip, and for straightening a crooked tip seam. In some styles of shoes, however, the distance of the end of the seam from the toe varies on the inner and outer sides of the shoe, and to provide for this, one of the rack-bars 44 is adapted to be moved independently of the other to adjust the position of the corresponding side gripper. This is effected by mounting the rack pinion 45<a> on a sleeve 55 surrounding the shaft 45; the sleeve is normally locked to the shaft 45, but is adapted to be unclutched from it and rotated independently by means of a hand-wheel 56. Springs are provided to return the gripper to its normal position after each pulling-over operation. For lasting the toes, duplex wiping- mechanism is employed to operate on rights and lefts. A wiper-supporting bar 70, Figs. 10, 11, and 13, is grooved to fit a rib 72<a> on the lower edge of a block 72 secured to the end of the front tacker arm 75. The block has a depending pin 74 passing through a slot in the bar 70 and carrying a spring 76, which supports the bar 70 and the wiper mechanisms, but allows the bar to be depressed to free it from the block 72 and then to be rotated to bring either wiping-mechanism into operative position. The bar 70 is recessed to receive a spring pin 77 on the block 72 to ensure that the wiper mechanism will be moved outwards by the tacker arm 75. At each end of the bar 70 is a crosshead supporting a carrier 78, to which are pivoted at 81 toe wipers 80; these are connected together by a pin and slot 80<a> at the centre of the toe, and these connected ends are advanced by springs 82, which, however, permit the wipers to adapt themselves to the shoe. Side wipers 85 are pivoted to the wipers 80, and are arranged to extend preferably to or beyond the tip seam. The advance of the wipers is effected by a finger-piece 94 mounted on a stud projecting from a padded abutment plate 90, this finger-piece engaging pins 91 depending from the wipers 80. These wipers turn about their pivots 81 and back away from the middle of the toe, so that the fullness of the upper is worked from the corners towards the middle of the toe, where it is wiped in by the forward movement of the whole wiper mechanism due to the engagement of the block 72 with the end of the slot in the bar 70 as the tacker arm 75 is advanced. Each side tacker mechanism comprises four tackers, of which the first, second, and fourth, counting from the front of the machine, are pivoted on a stud 95, Fig. 14, while the third 96 is rigid with the arm 75. Each tacker carries an adjustable abutment 98 for determining the position of the tack in the shoe, and these abutments engage and move the wipers 85 over the shoe bottom; the wipers are narrow, so that the tacks may be inserted at the inner edges of the plates into the relatively thick between substance just inside the feather edge of a turnshoe sole. To co-operate with the wipers 85, and for holding the upper better against the side of the last, each side clamp 3, described in Specification 9793/08, is formed with an extension 100, Fig. 10, to receive slides 102 carrying clamping-fingers 105; the slides are pressed yieldingly against the shoe by a spring pin 104 acting through an equalizing-bar 104<a>. The pivotal arrangement of the tackers enables them to adapt themselves to the contour of the shoe, so that the tacks are driven at a uniform distance from the edge. A similar arrangement is provided at the toe, where there are three tackers, which, as well as the side tackers, may be spread apart to change the spacing of the tacks. Each of the tackers of the different tacking-mechanisms is provided with a separate driver 120, Fig. 14, but these are driven simultaneously by transverse rods 124 extending through the driver heads and engaging between forked extensions at the lower end of the several driver bars 122. Preferably, the fourth tacker of each side tacking-mechanism is spaced a substantial distance back from the third tacker, in which case a spring wiper 132, Fig. 14, is provided to lay the upper smoothly down between these two tackers. Tacks are delivered in the usual way into holders 126, which comprise parallel plates pivotally mounted at their rear ends and pressed together by a spring 130. In order that the toe gripper, when it releases the upper, may be moved sufficiently clear of the wiper mechanisms, its actuating-lever is made in two sections pivoted together, and the tail-piece of the front section is connected by a pin and oblique slot with a fixed strut which accelerates the lifting movement of the gripper when its jaws free the work.