US1242622A - Multistretchable leather substitute. - Google Patents

Description

E. WEINHEIM. MULTISTRETCHABLE LEATHER SUBSTITUTE.

APPLICATION FILED FEB. 8- I917.

Patented Oct. 9, 1917.

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EMIL WEINHEIM, OF NEW YORK, N. Y.

Specification of Letters Patent.

MULTISTRETCHAIBLE LEATHER SUBSTITUTE.

Patented Oct, 9, 1917.

Application filed February 8, 1917. Serial No. 147,347.

To all whom it may concern Be it known that I, EMIL WEINHEIM, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Multistretchable Leather Substitutes, set forth in the following specification.

Heretofore it has been customary to make artificial substitutes for leather by the employment of a woven textile fabric, the body of which has been more or less completely impregnated with a leatherizing dope of various compositions, and the surface of which has been treated to give the appearance of finished leather. Many attempts, especially recently, have been made to use this leather substitute, characterized by the rectangular lie of the yarn from which the body fabric is woven, to make shoe-uppers and Vamps. This old substitute leather, on

account of the woven nature of its body fabric, has proven absolutely unsatisfactory for such articles as shoe-uppers and Vamps because of the fact that it will not stretch in the true sense of the word. The woven fabric has no strength against a diagonal shear or what may be described as a distortion on the bias. fabric is little more than an interconnectednet-work of squares which are structurally incapable of resisting shear when one side of a square is subjected to a force tending to make it slip relatively to the opposite side. On the other hand, such a fabric is inherently substantially unyielding either in the direction of the warp or in the direction of the weft. The type of leather employed for such articles as shoe-uppers, va-mps and gloves must be and is pliable and slightly stretchable substantially uniformly in all directions.

The object of this invention is to provide an artificial substitute for leather of the Such a body fabric I have discovered to be Geometrically, a woven The above may better be understood by reference to the accompanying claims and the following specification which sets forth an illustrative embodiment of the invention in connection with a diagrammatic showing in the accompanying drawings, which form a part hereof, and in which like characters designate corresponding parts in the figures, of which Figure 1 is a cross-section in diagram of a piece of the finished substitute, but showing the woven body fabric in simplified diagram designating a knit fabric of single, simple stitch, rather than the close, complex stitch which is preferable for the invention; and Fig. 2 is a plan view of a knitted body fabric.

I preferably employ closely knitted fabrics of high-grade cotton yarn or' Woolen yarn, or of a yarn combining both cotton and wool. It is preferable that the stitch employed be such as to impart as nearly as practicable uniform stretchability in all directions.

This knitted body fabric, diagrammatically indicated in the drawings by A is then treated with a suitable leatherizing dope which may be applied efficiently and conveniently by the process described in my co-pending application entitled Method of completely impregnating textile fabric with filling material, Ser. No. 130,930, filed Nov. 11, 1916, or by the employment of only a part, preferably the latter part of the process described in the said application. The leatherizing dope may be caused completely to permeate the body fabric A, as indicated in Fig. 1, so that it forms a wrong side c'overing 1 for the fabric A, a complete body filling 2, a right side covering 3, and finished surface 4 and, at the same time, completely permeating the threads or yarn 5 of the body fabric A; or merely the finished surface 4:, the covering 3 and a greater or less body filling partially permeating the I prefer the employment of a leatherizing 'dope for the body filling of my substitute formed from an emulsion of oxidizable oils such as linseed oil which has been partially oxidized and thickened by the application of heat and air, with the desired coloring pigments and fillers. llhe emulsion prefierably contains a small percentage of castoroil and maybe thinned for application with addition to this filling, a surface coating on the finished side of a soft, pyroxylin compound which likewise may be thinned with alcohol and should contain some castoroil. 7 In fact the entire body filling and coat? ing may be thesoft pyroxylin compound, if desire In view of the fact that it is practically impossible adequately to illustrate and describe the product which is the subject of my invention, I have embodied as a part of this application two samples, one of a suitable knitted textile fabric, and the-other a piece of the same fabric leatherized in acmeet cordance with my invention. 'The samples are so attached hereto that a ready test of the stretchability of a substantial amount inall directions may be made by the examlner.

What ll claim and what ll desire to secure by United States Letters Patent is:

1. An artificial substitute for leather of the type suitable for such articles as shoeuppers, Vamps and working gloves comprising a body-fabric of knitted yarn carrying a surface coating and filling of leatherizing dope of the oxidizable oil type whereby the finished artificial substitute is stretchable a substantial amount in all directions.

2. An artificial substitute for leather of the type suitable for such articles as shoeuppers, Vamps and working gloves comprising a body-fabric of knitted yarn carryinga surface coating and body-filling of leatherizing dope of the oxidizable oil type com-' pletely permeating the entire thickness of said body-fabric whereby the finished art-ificial substitute is stretchable a substantial amount in all directions.

In testimony whereof l have signed my name to this specification, this 7th day of February, 1917.

' EMJDL WEINHEJIM.

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