Patent GB-190619975-A (GB)
Title: Improvements in the Manufacture of Leather Belting and the like and in Machinery therefor.
Inventor: SARGEANT EDWARD FRANK
Filed: 1906-09-07
Granted: 1907-07-04
Abstract: 19,975. Sargeant, E. F. Sept. 7. Cutting-machines for leather.- Relates to the manufacture of leather belts, condenser rubbers, spinning - leathers, and other goods having scarfed joints, and particularly to means for bevelling the strips of leather &c., and for cutting off the strap ends where the strips have been held under the back clamp - bar. In the type of apparatus described in Specification No. 16,171, A.D. 1905, instead of employing stationary cutters and a traversing work table, the table is stationary and the cutters are traversed. The strips are fixed on an inclined table A by clamp-bars E, the front one of which is fixed while the back one is connected by rods K to weighted pivoted levers J. The table A is hinged at D and rests at its front edge on links H pivoted to the frame and to the levers J. In operation, a treadle M causes a rod N and the levers J to raise the front of the table and draw down the back clamp-bar, and clamping the work in position. The cutter O may revolve about an horizontal or vertical axis, but is shown mounted in a vertical bearing in a saddle Q adapted to be traversed by a leading screw R. The cutter is rotated by belt gearing from a pulley T splined to a transverse shaft U, along which it is moved by an arm projecting from the saddle. The spindle P of the cutter is mounted in two bearings, the upper one of which consists of a long brass bush, which screws into an outer bush having a coarse thread engaging similar threads on the frame. The outer bush has an operating-handle, by turning which the cutter is raised rapidly from the work, while the working position of the cutter is adjusted by the thread on the inner bush. In a modification, Fig. 7, the table may be fixed instead of hinged, the two clamps movable and controlled by independent weighted levers, and the cutter headstock hinged to the saddle Q. For cutting off the strap ends, where the strips are held under the back clamp bar, a knife Z, Fig. 4, is pivoted at Z' to a slide Z' adapted to traverse across the clampbar E and an extension E'. The slide is drawn forwards by a chain, engaging a stud Z' on the slide and attached to the saddle E. While working on the extension E' of the bar, the knife is held in an inoperative position by a finger Z<6> engaging a plate Z<7> below the bar, but on reaching the work, the knife is drawn down by the chain. On the return movement, the slide is moved by a finger projecting from the saddle, the knife being held up by another chain which is attached to the stud Z<4>, passes over a pulley, and is provided at its end with a counterweight. A press X is placed immediately under the table, or at one end of it, so that the free end of a strip, which is held at its other end in the press, can be operated on in the machine. The press X, the shaft U and the leading-screw R may all be driven by belt gearing from a driving-shaft V. The surfaces of the scarfs may be roughened as in the above-mentioned Specification, and cement may be applied by hand or by a revolving or reciprocating brush carried by the saddle. The ingoing side of the press may be provided with guides to keep the strips in line, and holes may be provided to enable the belts to be sewn or riveted in the press. According to the Provisional Specification, by adjusting the distance between the cutters and the table, and the angle of the table to the cutters, the latter may be caused to sink into the leather at the inner end of the joint, forming a recess to receive the point of the next strip which is made thicker than usual. In this way, the glued surface of the joint is more nearly parallel to the surface of the belt, and the joint need not be so long as usual.