US113631A - Improvement in machines for splitting and skiving leather - Google Patents

Description

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-ALEXANDERcocnarin, or ATHENS; onro.

'Letters Patent No.V 113,631, dated Api-i1 11, 1871.

IMPROVEMENT IN MACHINES FQR SPLITTING AND SKIVING LEATHER.

The Schedule referred to in theseLetters Patent: and making part of the same.

I, ALEXANDER COCHRAN, of Athens, in thecounty of Athens and State of Ohio, have invented an Iruprovement in t Machines for Skiving and Splitting Leather, of .which the following is a specification.

General Nature and Objects ofthe Invention.

My inventiony relates to the formation of depressions or recesses upon and about `the gauge or pressure-roller of a machine for skivin g and splitting leather to press the leather passing under the roller unequally against a straight-edged knife, and thus cause said knife to cut or' split the leather uniformly along, its entire length, so that its transverse section shall present an irregular form the counterpart` of that of the recess on the roller under which it has' passed the object of my invention being to 'cut, .with a straightedged knife, v heel-counters, welts, stiifenings, splitlifts, 85e., and in fact any form of leather strips having a transverse section, either beveled, more or less, at one or both edges, or rounded or sloping.

Description of the Accompanying Drawing.

Figure 1 is-an elevation of a machine for skiving and splitting leather having my invention applied thereto. y

Figure 2, a transverse section in the linea: :t of fig. 1.

Figures 3, 4, and 5, transverse sections of strips of leather which have'been split by being passed'thrbugh under the recessed portions of the gauge-roller.

General Description.

I have illustrated my invention in the accompanying drawing as applied to the .improved machine for skiving leather described in the United States Letters Patent No. 25,444, dated September I3, 1859, issued to Salford andOhase, although it is equally applicable to all leather-splitting machines having a straightedgedV knife.

A is the frame'or bed of the machine B B, standards, carrying in suitable bearings a horizontal'revolving-shaft,11, operated by asuitable handwheel, C; i

D I), cog-wheels on the ends of the shaft b and E, extended'pinion's revolving `about the standards B B. These standards are threaded exteriorly, as illustrated in the drawing, and the pinions E E are threaded interior-ly so as toscrew upon said standards. Hence, as the pinions are made to revolve by the revolution of the cog-wheels D-Dtheyare carrliel3 up or'down upon the screw-shafts or standards G G are loose collars placed upon the standards B B below the pinions E,Eand held up against them by coiled springs d d encircling the same. v

To the sleeves or collars Grv G are secured the end of the frame` A powerful spring, It, is so coiled upon the rod H, and secured thereto and to the frame lI, as to operate to throw up the frame when it is'released from a spring catch, N, which otherwise holds it down and keeps the gauge-roller in position over the knife for work, as illustrated in g. 1.

L, tig. 2, is-a straight-edged knife, of the same length as the gauge-roller K, and secured iu proper position upon the bed A by means of screws.

M is the spring apron or table of the machine, secured at its rear end to the bed A byscrews n n.

P is a har or rest, secured to the front edge of the spring table M, and which springs up under the knifeedve.

claim no part of the machine as thus far described as of my invention.

My invention consists in forming upon the gaugeroller K one or more concentric recesses, l 2 3, a dialnetric longitudinal section whereof, extendingfroni v the circumference of the roller to the bottom of the recess, will correspond or coincide with a-transverse sect-ion of a strip of leather having the'forrn which it is desired to obtain.

l, brinstance, represents a recess turned upon the roller Kvferthe` purpose of forming .strips for the counters of hoot-s and shoes. These strips require both edges to heheveled o'll`,'and present,-in transverse section, the forni illustrated 'in fig. 3. Hence, a recess is cnt cireumferentially on the roller to a depth equal to the thickness required iu the central portion of the counter, and of a width equal to said central portion thereof, the bottom of the recess being left parallel withY the axis of the roller. A bevel is then' cut at each end of the recess, sloping from its bottom outwardly, as illustrated in -fig. l at 1, with an inclination corresponding to that desired in the bevel of the edges of the counters.

der`the recessed portion l of the roller K and drawn through against the kuifeL, the inclined edges of the recess will carry down the edges ofthe leather so. that the knife will split them upon a` bevel the counter'- part of that on` the roller, while the central v'portion of the leather will pass over the knife without being cut,

unless it' exceedsa proper uniform thickness, in which case the knife will split or cut it thickness throughout.

"For-producing half-round leather for tugs or for split-lifts I form arecess, 2, having a clirved section, as illustrated in lig. 1.

evenly to annifom If, now, a strip of, leather, of proper width and thickness, .be placed nn- For producing split-lifts or welts in which a transverse section presents a Wedgeshape or an incline, from an extreme thickness on one edge to a minimuml on the othrr, I form a oiroumferential recess of `the form illustra ted at 3 of g. l.

The cross-section of a strip of leather passed under the recess 2 ot' the roller is illustrated in iig. 4.

The`crossseotion of a strip of leather passed under the recess 3 of the roller is illustrated in iig. 5. 4 l

A portion, 4,'of the roller may be left of uniform diameter, for use in splitting and skivingjleat-.her in the usual manner, or a recessed roller may he substituted for the ordinaryeylindrical roller in any form of splitting or skiving-maehine for 'the' purposes of my invention, the two sets of rollers being made detachable and interchangeable for the purpose.

- herein set forth.

Claim.

lin the leather strip which it is desired to produce therewith, all substantially as and for the vpurpose ALEXANDER oooHaAN.

`Witnesses:

DAVID A. BURR, E. A. DICK.

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