Patent GB-191225272-A (GB)
Title: Improvements in or relating to Processes for Making Stitch-down Boots and Shoes, and to Machines for Lasting the same.
Inventor: BOULT ALFRED JULIUS
IPC: A43D113/00
Filed: 1912-11-04
Granted: 1914-02-04
Abstract: 25,272. Boult, A. J., [United Shoe Machinery Co.]. Nov. 4. Lasting.-In making stitch-down boots and shoes, various selected points are successively presented to a machine having a tool such as 16, Fig. 3, which forces the upper material into the angle between the upper and sole, or into the angle of a shouldered sole, if such a sole is used, and then the upper is secured in position by inserting individual permanent fasteners, such as staples 174, in the angle through the upper and into the sole ; preferably, the tool 16 also wipes the upper down the side of the last before forcing it into the angle, and is formed with a throat so that the staple &c. may be driven through it into the work. The boot &c. is completed by trimming back the edge of the upper from the edge of the sole, as shown in Fig. 10, laying a welt 176 on the margin of the upper, and securing the various parts together by a row of stitches 178*. Figs. 1 and 2 show a lasting and stapling machine for use in carrying out this process; the mechanism for making and driving the staples is substantially the same as that described in Specification 17,439/05. The assembled shoe is supported on a work-support 18, and is lasted by raising the support until the tool 16, which is formed by providing the machine with a shaped staple nozzle, engages the upper and wipes it down the last into the angle, as above described, after which the movement of a knee lever throws the stapling-mechanism into operation to drive a staple through the nozzle into the work. The work-support or anvil 18 has an inclined surface 20 offset at 22 to form a shoulder, which supports the work against the thrust of the staple driving operation. The anvil is pivoted at 24 to a bead 26 at the upper end of a post 28, which is slidable in a horn 30 ; the horn is carried by a post 31 adapted to slide in a bracket 32 adjustably clamped in a second bracket 36, which is integral with the machine frame. The anvil is furnished with a tail-piece 38 pivoted to a rod 40, which is slidable in an arm 42 rigidly connected to two studs 44, 46 projecting from the post 28 through a slot 48 in the horn 30. Above the arm 42 the rod carries a stop and lock nuts 50, 52, and below it a spring 54 and a stop nut 56 adjustable by means of a second nut 58. This nut is adapted to be engaged by the end of an adjnstable screw 60 threaded through an arm 62 carried by the horn. The post 28 is adapted to be moved relatively to the horn 30 by means of a lever 68 pivoted between ears of a support 72 bolted to the bracket 32, one end of the lever being rounded and engaging a slot 76 in the post 28. The lever is adapted to be moved either by means of a handle 80, or through a chain connexion 84 by a treadle lever 82. The horn 30 is adapted to be raised to clamp the work in position to receive a staple by yielding- connexions 86, 100, 92, 94 with a cam 98 on the cam shaft of the machine, this shaft being adapted to be thrown into gear by a clutch controlled from a knee-lever 142. In operation, the anvil is raised manually until the shoe engages the nozzle 16, when the continued pressure on the treadle causes the support to tilt about the pivot 24 so that the upper is properly wiped round the last and into the angle of the shoe. The knee-lever 142 is then moved to throw the cam shaft into operation, and the horn 30 is raised to clamp the work. During this movement, if the nut 58 has been set so that it is engaged by the screw 60 before the lower end of the slot 48 in the horn engages the stud 46 on the post 28, the rod 40 will be given a further lift to tilt the anvil still more about its pivot, so that the nozzle 16 will tuck the upper fully under the overhanging portion of the last ; this ensures that the staple, when driven, will be at a considerable angle to the face of the sole and out of the way of the stitching which is subsequently performed. If desired, however, the whole of the upward movement of the work-support may be effected by power. In some cases, it is necessary to effect a greater stretching of the upper than by the means described, and for this purpose there is provided a jaw 106 adapted to clamp the work against the rear face of the nozzle 16. This jaw is adjustably pivoted in a slide 108, which is normally held by a spring 110 in a position in which the jaw is inoperative. The slide is adapted to be projected forwards by a bell-crank 130 operated by a chain connexion 138 from the treadle lever 82 ; the chain is disconnected when the jaw is not required. When operating upon certain kinds of work, the machine is provided with yielding lasting-fingers, which are adjustably arranged on either side of the nozzle to engage the edge of the upper in advance of the nozzle.