US210823A - Improvement in machines for splitting and beveling leather - Google Patents

Description

G. L. TYLER. I Machine for Splitting and Bevel ing Leather.

No. 210,823. Patented Dec. 10,1878.

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GEORGE L. 0F LYNN, MASSACHUSETTS, ASSIGNOR OF TVVOTHIRDS HI$ RIGHT TO T. W. TYLER AND G. O. BEEDE, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR SPLlTTlNG AND BEVELING LEATHER.

Specification forming Iml'fi a Letters Patent No. 21 .823, dated December 10, 1878; application filed November 11, 1876.

To all whom it may concern.-

Be it known that I, GEORGE L. TYLER, of Lynn, in the county of Essex and State of Massachusetts, have invented certain Improvements in Machines for Splitting and Beveling Leather, of which the following is a specification:

This invention is an improvement on machines described in Patent No.196,197, granted October 16, 1877, to Dancel and Smith for machinery for splittin g and beveling leather.

' In said machine a curved knife is employed,

which, operating in connection with certain feeding and guiding devices, shaves a beveled strip from one side of a sheet or blank of material presented to the knife, such blank being, for example, a counter or heel-stiffener blank, which is thus properly beveled. The strip removed by the knife is of considerable thickness at one edge, but is reduced so gradually in cross-section that its other edge is extremely thin. The thicker portion of the strip is available for rands for boot and shoe heels 5 but the thin edge is of no value, and has to be trimmed oft.

My invention consists in providing the machine with a trimming-knife arranged to trim off the thin edge of the strip out by the curved knife, and thus convert said strip into a suitahlyformed rand while the strip is being shaved from the sheet, said trimming-knife also aiding to guide the sheet or blank of material in its passage through the machine.

The invention also consists in the provision of a groove in the roller which supports and presents the material to the knife, the edge of the trimming-knife projecting into said groove, so that the periphery of the roller on either side of the groove will support the shaved strip while it is being trimmed, and prevent the strip from being deflected by the trimmingknife without being trimmed, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a top view of said patented machine, showing my improvements in dotted lines, the upper or gage roll being partially broken away. Fig. 2 represents a section on line was, Fig. 1. Fig.

3 represents a section on line 3 1 Fig. 2. Fig. 4 represents a cross-section of the strip before it is trimmed, and Fig. 5 represents a similar section after trimming.

Similar letters of referenceindicate like parts in all the figures.

In the drawings, K represents the curved shaving or splitting knife, located on a suitable support.

The feeding mechanism consists of a corrugated supporting-roller, I, enlarged at one end to correspond to the curvature of the knife K, and a-gage-roller, D, to keep the material down upon the roller I. N represents the edge-gage. These parts are constructed and arranged sub stantially as in said patented machine.

In operation, the feeding mechanism presents the sheet or blank to the knife K. The gage N guides the edge of the blank, and the knife cuts a beveled strip, 8, from the under side of the blank, said strip passing under the knife K, while the blank passes over the same.

For a more detailed description of the parts enumerated and their operation, I refer to the above-named patent.

The strip 8 is of considerable thickness at one edge, and gradually diminishes in thick ness in cross-section, so that its other edge is very thin, as shown in Fig. 4, the thick edge of the strip beinga part of the edge of the blank or sheet that bears against the edge of the gage N during the operation.

K represents the trimming-knife, which constitutes the chief part of my improvement. This knife is rigidly attached to a suitable support under the shaving-knife K, and is arranged to trim the thin edge from the strip 8 as it passes from the shaving-knife, and leave said strip in the form in cross-section represented in Fig. 5, the strip being thus adapted for use as a rand.

The edge of the trimming -knife extends downwardly from the under side of the shaving-knife, as shown in Fig. 2, and is preferably inclined backwardly.

The feedroller I is provided with a narrow peripheral groove, 9', immediately opposite the trimming-knife K, andthe latter is so arranged that a portion of its cutting-edge projects into the, groove, so that the strip 8, asit passes under the shaving-knife K, is supported by the roller I on each sideof the trimming-knife, and close to the point where the strip 8 is out, this support preventing the strip from yielding or bending as it is pressed against the trimmingknife, and enabling the latter to easily cut the strip.

It will be seen that by the employment of the trimming-knife the strip sis adapted for use while it is being shaved from the sheet without a separate trimming operation after it is detached from the sheet, such as would be necessary if the trimming-knife were not employed. Moreover, the trimming knife, af-' ter it has commenced to out the strip 8, has a tendency to keep the blank or sheet of material in contact with the edge-gage N, or, in other words, it prevents the blank from moving laterally away from said gage, thus co-opcrating in guiding the blank, as will be readily seen.

The knife K is preferably provided with a shank, K which is secured by a set-screw, S, in a slotted lug, L, attached to the bed or support on which the knife K is supported. The

slotted lug and set-screw enablethe knife K to be readily adjusted to compensate fortits wear.

I claim as my invention 1. In combination with the curved shavingknife adapted to shave a beveled strip, s, of the form shown from the side of a sheet of ma- I terial, the trimming-knife.arrangedto separate the thin edge from the beveled strip, and adapt said strip for use as a rand,,suitable feeding mechanism being employed to propel the material against the knives.

2. The combination of the trimming-knife with the shaving-knife and the grooved feed-- LYMAN F. CHASE, CHESTER WITHA'M.

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