Patent GB-190506406-A (GB)
Title: Improvements in Machines for Cutting Leather and other Material for the Ornamentation thereof.
Inventor: KNIGHT GEORGE
Filed: 1905-03-27
Granted: 1905-10-19
Abstract: 6406. Knight, G. April 26, 1904, [date applied for under Patents Act, 1901]. Cutting, punching, and perforating machines.- Relates to a machine for ornamenting leather or other material by cutting, punching, scalloping, or pinking, in the production of toe-caps or other parts of shoes, but applicable for other purposes. The holes 13x, 15<x> of the toe-cap shown in Fig. 10 are made by hollow punches 13, Fig. 11, mounted in a punch plate 10, the rear ends of the punches abutting against a steel plate e ; the lower edge is cut by a pinking-cutter g held in position by clamping-plates. To the punch plate 10 is attached a pin 9 supported by a wedge-shaped slide bar 6, resting in a groove 5 in the upper edge of the holder b<1>. By moving the slide bar longitudinally, the punch plate and punches are adjusted vertically in relation to the gauge supports b<14> on which the material s to be ornamented is rested. The slide bar is fixed in position by a tapered pin 16, Fig. 8, which is forced against the slide by an adjusting- screw 18. The punches and cutters remain stationary, and the material is pressed up against them by a reciprocating carriage B running in guideways and operated by an eccentric on the hollow shaft C<6>. In order to protect the punches and cutters from wear by repeated contact with the face-plate of the carriage B, a strip A<4> of paper or other material is interposed between the punches and the face-plate. The strip of paper or other material is unwound from a roll A<3> by means of scored or fluted rollers D, D<1>, the formation of " slack being prevented by a spring-controlled friction strap on a hub extension of the roll A<3>. The roller D' is mounted in arms D<2> pivoted at r, and is pressed against the roller D by a spring r<1>. The roller D is supported in the framework, and is actuated by a pawl a<2> mounted on a pawl carrier a, a pin on which is embraced by the forked end of a lever a' acted upon by a cam 2 on the shaft D'. By the motion of the rollers D, D<1>, a fresh portion of the strip is brought into use for each operation of the punches. Backward movement of the rollers is prevented by a spring-pressed detent b. An adjusting-rod a<10>, by limiting the motion of the lever a<4>, regulates the advance of the strip. A stripper plate e<2>, pressed outwards by springs t<10> and having a series of holes to surround the punches during the punching operation, shields the punches when the material to be ornamented is inserted in the machine, and strips the material from the punches on the return of the carriage B. The gauge supports b<14> are pivoted to a stand b<10>, and when the carriage is pressed against the punches, it knocks the supports from under the material. A finger f<1> mounted on a rod f attached to a camactuated lever f <5> returns the supports to their original position, and any waste material cut off by the pinking-cutter is allowed to drop out of the machine. The shaft D<3> is driven from a shaft H, mounted in the hollow shaft C<6>, by means of a toothed pinion fixed to the end of the shaft Hand engaging a toothed wheel H<2>, Fig. 2, loosely mounted on the shaft D<3>, but having a series of teeth H<3> which are engaged by a slide tooth n<2> contained in a hub H<5> fixed to the shaft D<3> and forced into contact with the teeth H<3> by a spring, when released by a treadle acting through a rod H<9> and a spring-pressed lever H<6>. The shafts C<6>, D' rotate once and stop. When the shaft D<3> has made a quarter-turn, a lever M<4>, Fig. 6<a>, operated by a cam-groove attached to the shaft D<3>, withdraws an arm m<6> from a notch in the dog M<2>. The dog thus released engages with a rotating pulley M, and starts the hollow shaft C<6> at a faster speed, so that the two shafts finish together. The backing- strip A' is advanced during the last quarter of a revolution of the shaft D'.