Patent GB-191024665-A (GB)
Title: Improvements in or relating to Inseam-trimming Machines adapted for use in the Manufacture of Boots and Shoes.
Inventor: BOULT ALFRED JULIUS
IPC: A43D49/00
Filed: 1910-10-24
Granted: 1911-10-19
Abstract: 24,665. Boult, A. J., [United Shoe Machinery Co]. Oct. 24. Trimming. - An inseam - trimming machine having a cylindrical or other knife is fitted with a grinding-device which is adapted to grind one side of the cutting-edge to a convex bevel; it is also provided with improved feeding and guiding means for the shoe. The knife 12, Figs. 1 and 4, is fixed to a shaft journaled in a pivoted yoke 14, and is continuously rotated from the driving-shaft 5. The grinding-device consists of a disk 25 mounted on a shaft 26, which is journaled in a frame 32 slidably mounted for purposes of adjustment on rods 30, 31 located in a yoke 29 at the upper end of an arm 27. This arm projects from a sleeve 28 surrounding a shaft 53, which is adapted to be oscillated by connexions with a sleeve surrounding the shaft 5. This oscillation is started when a treadle 46 is depressed, and by the same movement the rotation of the shaft 26 is started through pulleys 39, 37 and a belt 38. The trimming- knife, in the form of a cylindrical band, is removably secured in its holder, and is mounted for movement, under the control of the operator, towards and away from the feeding-means to vary the depth of cut. The construction and method of mounting the knife, however, form no part of the present invention. The work is fed by a pair of adjustable spring-pressed jaws 19, 20, Fig. 3, which are adapted to grip the welt. The jaws are opened and closed by a rod 88, which is actuated by a bell-crank 86 from a face groove in a cam 84 on the cam shaft 21, and are oscillated to effect the feed by a hollow shaft 95 and arms 94 actuated by a peripheral groove on the cam 84. The axis of the shaft 95 is arranged obliquely to that of the trimming- knife, so that the shoe is fed with its sole in a plane extending obliquely away from the axis of the knife. The sole is guided by a spring guide 97, Figs. 1 and 6, which engages the sole immediately beyond the edge of the knife, a creaseguide 103, Figs. 1 and 3, a guide 104, Figs. 6 and 7, arranged to bear on the edge of the welt at the side of the upper, and a curved spring- pressed guide 107, which engages the bottom of the sole and the inseam. The guide 97 is secured at one end in a bracket attached to the yoke 14, and it is bowed to adjust its other end to regulate the depth of cut by a slide block 100, Fig. 6, movable by means of a thumb-screw 101. The crease-guide 103, which regulates the height at which the shoe is held, is rigidly mounted on the main casting adjacent to the feed-jaw 19. The guide 104, Figs. 6 and 7, is located inside the periphery, and beyond the cutting-edge, of the knife, and is furnished with a tapering recess 104<a> to permit the edge of the upper to bend away from the lip of the sole. It is supported on an arm 105 projecting from a vertical shaft 106, which is secured in the main casting by a set-screw. The guide 107 is mounted below the guide 104, and is furnished with a spring- pressed pin 108 having an annular rib 109, which engages both the sole and the substance of the inseam, as shown in Fig. 7. The guide is formed upon an arm 110, Fig. 6, adjustably secured in block 111 pivotally mounted on the lower end of the shaft 106. This block is flexibly connected to a treadle 113, Fig. 1, by means of which the pin 108 can be withdrawn from contact with the work.