US867527A - Leather-working machine. - Google Patents

Description

No 867,527. PATE NTED OCT. 1, 1907;

F. 10. PACKARD. LEATHER WORKING MACHINE. APPLICATION TILED 1130.6,1906.

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No. 867,527. I PATENTED 0'01; 1, 1907.

P. c. PAGKARD. LEATHER WORKING MACHINE.

APPLIOATIOH FILED D30. 6, 1906.

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FRED O. PACKARD, OF SALEM, MASSACHUSETTS.

LEATHER-WORKING MACHINE.

Specification of Letters Patent.

Patented Oct. 1 1907.

Application filed December 6, 1906. Serial No. 346,610.

of which the following is a specification, reference be- 1 ing had therein to the accompanying drawings.

In leather working machines employed in tanneries for performing various-operations, but more especially for shaving, the skin or hide is'supported on a bed roll and is fed by means of the rotation of the bed roll and of a pinch roll which cooperates therewith to the operating tool which is provided with spiral blades which perform the desired operation upon the skin. The operating tool revolves at a high rate of speed and its blades shave the skin or perform the other desired operation upon it. Great difficulty has been found in this class of machinery in causing feeding instrumentalities to feed the skin to the operating tool in such a manner that the skin lies perfectly flat on the bed roll and without wrinkles. If the skin is wrinkled or folded, the tool tends to cut or otherwise injure it, or works it unevenly. To this end, I have made my present invention with the object of insuring that the skin be smooth and flat upon the bed roll, so that it is uniformly operated upon by the operating tool. My contrivance is exceedingly simple, but entirely effective in its operation. It may be employed on a variety of leather working machines of the general character described. I have, however, shown it in connection with a type of machine frequently employed in tanneries. In this type of machine, the bed roll or work support is automatically swung into and out of engagement with the pinch roll and the operating tool. It will be understood, of course, that my improved spreader board may be employed in connection with other machines for performing the same class of work.

The invention will be fully understood from the following description taken in connection with the accompanying drawings and the novel features thereof are pointed out and clearly defined in the claims at the close of the specification.

Referring to the drawings,-Figure 1 is a front elevation of the machine embodying my invention. Fig. 2 is a transverse section of the same.

In the drawings,at A is indicated the frame of the machine, upon which are supported the swing arms B which are caused to oscillate at proper intervals by any well-known mechanism. I have not thought it necessary to show in detail theoperating mechanism,

1 as it forms no part of my invention. The spirally bladed tool is indicated at E. The swing arms B carry at their upper ends the work support or bed roll F which is preferably covered with rubber or some slightly elastic covering. When in operative position, as shown in Fig. 2, the bed roll supports the skin to be operated on in contact with a pinch roll G suitably said parts are given their proper movement in the wellknown manner by any convenient mechanism.

On the upper ends of the swing arms B is supported the spreader board H by means of the brackets I. The spreader board H is made. of any convenient material, preferably of wood, and has its upper edge curved to form the arc of a circle of large diameter, as shown in the drawings. The upper edge is also rounded, as shown in section in Fig. 2, so that the skins or hides which are thrown successively over the upper edge of the spreader board may be fed from the spreader board to the rolls without injury to the texture of the skins. It will be seen that the spreader board being carried by the upper ends of the swing arms is always maintained in a fixed relation to the bed roll.

The operator in using a. machine in which is embodied my invention throws the skin to be worked over the curved edge of the spreader board, allowing the free end to fall over the surface of the bed roll in such a position as to be seized by the pinch roll and thus caused to be fed to the operating tool. The rotation of the bed roll and pinch roll causes the skin to bedrawn over the curved edge of the spreader board and the operator during this movement retards the movement of the skin on the spreader board slightly, so that it contacts firmly with the upper edge of the spreader board. The skin, as it is drawn by the said rolls over the spreader board, is spread out perfectly smooth and passes between the bed roll and the pinch roll in an entirely fiat condition and without wrinkles or folds. As will be seen from the drawings, the highest point of the upper edge of the spreader board is somewhat above the bite of the rolls, this being desirable to obtain the best results from the board.

The use of my improved spreader board obviates the necessity for using spirally bladed spreading rolls or ribbed spreader boards, such as have heretofore been sometimes employed, but at the same time equally good results are obtained with less effort on the part of larly convenient for the operator, the whole being at a convenient height and in such a position on the masupported in the frame of the machine. All the aforethe operator. The improved spreader board is particu- I chine that the hide is easily put in place and without of a spreader board whose upper edge is in the form of a 10 curve, the highest point of said curve being above the point danger to fingers of the Operator of contact of the feeding instrumentalities.

What I 01mm 153 In testimony whereof I aflix my signature, in presence of 1. The improved spreader for leather working machines two witnesses. comprising a board over the working edge of which the skin or hide is fed, the said working edge being in the form FRED PACKARD of a curve in the plane of the board. Witnesses:

2. The combination with feeding mechanism for the GEORGE P. DIKE, operating instrumentalities of a leather working machine ALICE H. MORRISON.

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