US27073A - Machine for trimming - Google Patents

Description

UNITED STATES PATENT OFFICE.

IV. H. ROUNDS, OI CAMIBELLO, MASSACHUSETTS.

MACHINE FOR TRIMMING, CHAMFERING, AND SKIVING LEATHER.

Speccation of Letters Patent No. 27,073, dated February 7, 1860.

To all 'whom it may concern:

Be it known that I, IV. H. RoUNos, of Campbello, in the county of Plymouth and States of Massachusetts, have invented a Machine for Trimming, Chamfering, and Skiving Leather, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, making part of this specification, which represents a perspective view of the machine.

In the manufacture of boots and shoes, the back after being cut to a pattern, has the lining pasted on it and then is trimmed by hand, the edge of the leather being chamfered off or beveled when to be sewn by hand and cut square when to be sewn on a sewing machine.

To facilitate this work I have invented a machine which I will now proceed to describe in such a manner that others skilled in the art may understand and use my inven tion.

In the said drawing, A, a bed or table on the under side of which, supported in suitable bearings is a shaft B, carrying at one end a hand wheel C, and at the other end a notched or serrated feed wheel D, which projects a short distance through a slot in the table A. An arm E, rising from the table A, carries at its outer end a rod F, which slides up and down in the end of the arm and is pressed down toward the table by a coiled spring a (shown dotted). A screw Z9, passes through a slot in the end of the arm into the rod F; this rod carries at its lower end a presser roll or wheel G which revolves on an axle in the end of the rod and in the same plane as the feed wheel D upon which it presses, or upon the leather to be trimmed. This gives the rough surface of the feed wheel a hold upon the leather which is carried through the machine as the hand wheel C is turned. A segment H having a slot c, in it, is secured at d, to the top of the table. A block I, which fits to the inner curve of the segment H, is held in place after being adjusted by a screw e, which passes through the slot c, the head of the screw being larger than the width of the slot. The shank of a knife f passes up through a suitable hole in the block I, and is secured in position by a screw z' which passes through the side of the block. A

guard K, is secured to the top of the table by a screw and slot at g, and is adjusted so that its edge at Z, shall rest against the edge of the knife f. A guide L, is secured to the table by a screw and slot at h, and extends over the guard K. It has a notch m cut in its underside at the front of a sufficient depth to allow the leather to be passed beneath this guide which is adjusted in position so that the shoulder at the back of the notch m, shall be far enough back for the knife f to take oif a shaving of the required width from the leather. Then the block I, is in the position shown in the drawing the edge of the knife f, will be perpendicular to the table A, and will cut the edge of the leather square, but when it is required to chamfer or bevel the edge of the leather the screw e, is loosened and the block I, is moved farther down the segment I-I, until the required inclination of the knife is obtained when the screw e is again tightened up. As the knife f is ground away the guard K is moved up to it.

The following is the operation of this machine: The parts having been properly adjusted, the operator standing at the front of the machine passes the piece of leather to be trimmed, under the guide L the edge of the leather being pressed up against the shoulder of the notch m, the wheelC, being turned in the direction of its arrow the leather is carried by the feed wheel D past the edge of the knife 7, which takes off a narrow shaving leaving the edge either square or beveled accordingto the position of the block I; the trimming being done with much greater accuracy and uniformity and with less expense of time and labor than when cut by hand as heretofore.

I have heretofore spoken of this machine as used for trimming parts of boots and shoes before they are sewn up, but it is evident that it may be employed to trim leather for other manufacturesnfor example, for harness making.

The segment I-I, is struck from a center where the point of the knife f, touches the table A. This leaves the point of the knife in the same position although the inclination of the blade may be changed.

For skiving leather the guide L is removed and a knife O (detached in Fig. 2,) with its guard S is adjusted and secured in of the block I.

its piace, the leather is then passed between this knife and its guard S, when the feed Wheels D, G draw it through as before, or the knife f maybe used for this purpose by moving the block I stili farther down on the segment I-I (part of which projects beloW the table as shown dotted) until the edge of the knife makes an acute angle With the face of the guard K, the point of the knife pointing upward, and the shank being thrust farther through the block I, an opening Z is formed in the table for the passage Vhave the range of adjustment represented,

to adapt the machine to the Varied purposes 20 mentioned substantially as described.

W. H. ROUNDS.

Witnesses:

THos R. RoAoH, P. E. TESCHEMACHER.

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