DE74956C - Machine for making seamless belt loops and similar items - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The eyelets or loops for leather straps that have been used up to now are made from pieces of leather which are bent into the required shape and the ends of which are connected by sewing. Purpose of the present Invention, now, is a simple process for the manufacture of such articles to give, as well as a machine for the production of these eyelets, whereby the quilting in If it is omitted, the production costs of the objects are significantly reduced and in terms of strength and durability, a better product can be achieved than with the previous procedure.

The method of the present invention consists essentially in removing a piece of leather to split upright to a part of its extent in order to obtain a split workpiece, and then stamping the same into the desired shape.

The attached drawing shows:

Fig. Ι side view,

Fig. 2 front view,

Fig. 3 section through the punch (male mold), perspective view,

Fig. 4 section through the punch (die),

Fig. 5 view of a split work piece for a loop,

6 is a view of a complete loop or eyelet,

Fig. 7 View of the movable jaw of the machine.

A represents a table which supports the working parts of the machine, B is a stand on the table, in the upper end of which a lever C is rotatably arranged; this lever C is coupled to the step K by means of a pull rod D. A rod E is hung in a slot L of the lever and moves vertically in the guides 2 which form part of the stand B. Under these guides and detachably attached to the rod E by a set of screws 3 is a cutting head 4 in which the central splitting knife blade F and, on the two sides of the latter, at right angles to the same, the two knives 5 and 6 are inserted. The knives are given a simultaneous vertical up and down movement by the movement of the step. The distance between knives 5 and 6 corresponds to the length of the loop (Fig. 6) before punching, and as shown, knife F protrudes a little beyond knives 5 and 6. These three blades, which work with one another, split the leather upright and at the same time cut it into the relevant length, as the unfinished work piece in FIG. 6 shows. The leather, whether it is a continuous strip or a single piece, is held in place on the table by a device shown in FIG. 2 during this splitting and cutting device.

A removable plate 7 is dovetailed into the table, and is with Slit to allow passage of all knives. An adjustable jaw 8, whose feet 9 move in guides 10,

Claims (1)

is by a screw nut 11 on the Screw shaft 12 set in motion; the latter acts in stands 13 on the table. This jaw is adjusted in the direction towards or from the plate 7, depending on the thickness of the leather. A movable jaw 14 slides in similar guides on the table the opposite side of the valley plate; The shaft 15 of this jaw is supported by a spring 16 surrounded, which tends to keep the cheek away from the throat plate. These Rod is put into effect by a rotatable angle lever 17, which with the step lever is connected by a pull rod 18, through which the required limited Movement occurs. By the downward movement of the kick you are on this Way, the knife is depressed and at the same time the jaw 14 against the pressure of the spring moved inward. The leather is placed upright on the plate 7, whereupon the step is depressed. Before the knives have reached the leather, the latter is clamped between the jaws and held on the plate 7 until the step is released. The middle knife F splits the leather upright, while the side knives 5 and 6 cut the latter close to the ends of the split. In this way, a leather strip can be cut out very quickly into unfinished loop work pieces (FIG. 5); each of these work pieces, as soon as it is severed, is pushed out of the way by the following end of the strip. Small pieces of leather are of course introduced one at a time. With such a machine, as it is described here to explain the process, the work of producing unfinished loops is continued until a sufficient number of them have been made available for punching, and then the whole amount of the Finished loops one after the other. To do this on this machine, the cutting head, the knives, the jaws and the plate 7 are removed and then the punches HI are used in their place. Fig. 4 shows a hollow punch (die) with a foot which is shaped in this way to fit dovetail-like in the place previously occupied by the plate 7 was. The inner shape of this stamp is that of a complete loop, so that the introduction the unfinished loop in the same causing the loop to open a little. Instead of the cutting head, the full punch / (male mold), FIG. 3, is attached to the rod E. By pressing down the step, the punch / is now guided downwards, and the work piece is completely opened and pressed into the shape, which is shown in Fig. 6, and represents an endless and seamless leather loop or eyelet, ready for attachment as a tongue loop, suitcase loop, Push button, as required; these loops are superior to the now common quilted loops in terms of strength and durability. It is advantageous to have a Attach spring 20 as shown in Figure 7; the same lies against the leather and holds it before the two cheeks come together; the spring is pushed back against the cheek or into a cavity, when the two jaws are closed. ' In the manufacture of other seamless leather articles, such as B. Blinders, Eyeglass cases, spindle sleeves, holsters, etc., the same procedure is used, except that the leather is not completely split, but only so far as to to form a seamless pocket of the general shape and size of what is to be manufactured Object; this pocket is then expanded to include the finished object close. PATENτ claim: A machine for producing seamless belt loops and similar objects, characterized by an upwardly and downwardly movable punch (E), which is provided with a knife (F) for splitting and two knives (5, 6) for cutting the belt in a certain length. 1 sheet of drawings.