US1800560A - Transfer web - Google Patents

Description

Filed May 5, 1927 Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE SAMUEL A. NEIDICH, OF EDGE-WATER PARK, NEW JERSEY, ASSIGNOR TO NEIDIGH PROCESS COMPANY, OF BURLINGTON, NEW JERSEY, A CORPORATION OF DELAWARE TRANSFER WEB Application filed May 5, 1927. Serial No. 189,166.

My invention relates to webs of flexible fabrlc adapted to receive typewritten impressions upon one side thereof and to transfer copies of such impressions from a coating of transfer material upon the opposite side of the web. Such webs of the type known as carbon paper include a tissue paper web which is coated with a transfer material known to the trade as dope and including powdered carbon mixed with a waxy sub stance, for instance, carnauba wax, and a fatty substance, for instance, Vaseline. Such material is normally solid at atmospheric temperatures and must be melted to apply it to such fabrics, and has a melting point of about 165 F. Such dope is extremely brittle and frangible, both in mass and as a coating, and, as heretofore manufactured, extreme care must be used in the selection of the paper stock and in the application of the dope coating thereto to render them so far coherent as to be commercially practicable; in view of the fact thatthe coating has a tendency to entirely separate from such paper web, at the first impression, whereas, for the majority of uses of such transfer webs, it is essential to have them durable for many impressions.

Moreover, when such tissue paper webs are made thin enough to be used for simultaneous production of six or more copies from a single impression, the paper is necessarily so fragile that it may be ruptured and thus rendered worthless before the transfer coating thereon has been fully utilized.

Therefore, it is the object and effect of my invention to provide a flexible web of tissue paper,'or other cellulose fabric, including a toughening material rendering it abnormally resistant to stresses, particularly such stresses as are produced by the impact of type; andto provide such a toughening material as will increase the normal tendency of a web to adhere to transfer material ap lied thereto, and without impairing the flexi ility of the web which is'essential to the transfer of clear impressions.

In said drawings; Fig. I is an enlarged fragmentary sectional view of a web of flexible fabric.

Fig. II is an enlarged fragmentary sectional view, showing said web coated with a toughening material.

Fig. III is an enlarged fragmentary sectional view of said coated web, with a coat ing of transfer material applied to one side thereof.

Referring to said drawings my invention includes a web of flexible fabric 1, coated upon one side, or otherwise impregnated with a toughening material 2 which may be any suitable substance which is gummy and elastic but which is not sticky. I prefer to employ, as such toughening material, a solution of gutta-percha as hereinafter described Crude commercial gutta-percha, which is about the consistency of soft molded rubber, may be dissolved in carbon tetrachloride, or other suitable solvent, and such solution be sprayed or brushed upon the surface of the web of flexible fabric, for instance, tissue paper. I prefer to use carbon tetrachloride not only because it may be quickly evaporated, but it is non-explosive.

As shown in Fig. III, said coated web has a coating of transfer material 3 upon one side of said web. Said coating of transfer material may include powdered carbon mixed with a waxy substance, for instance, carnauba wax, and a fatty substance, for instance, Vaseline.

However, crude commercial gutta-percha is soluble in carnauba wax, at a temperature above the melting point of the latter, and the strength and durability of the ordinary tissue paper used for carbon transfer webs may be materially enhanced by the application of a coating of such a mixture, which may also include the pigment desired for transfer purposes.

In other words, the toughening material may be applied to and be absorbed by the transfer web as part of the transfer coating thereon.

Therefore, I do not desire to limit myself to the specific construction and arrangement or method of procedure herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention, as defined in the appended claims.

1 material, formm I claim:

1. A web of flexible fabric adapted to re ceive type impressions, including a gummy material, formin one smooth face on said fabric and enhancing the normal resistance of said fabric to such impressions; and a coating oftransfer material upon the opposite face of said web.

2. A web of flexible fabric adapted to receive type impressions, including'an elastic one smooth face on said fabrlc and enhancing the normal resistance of said fabrlc to such lmpressions'; and a coating of transfer materialupon said web.

3. A Web of flexible fabric adapted to receive type impressions, including guttapercha, forming one smooth face on said fabm0 and enhancin the normal resistance of said fabric to sue impressions; and a coating of; transfer material upon the opposite face of said web. I

4. A tissue paper impregnated with guttapercha; and coated with transfer material.

In testimony whereof, I .have hereunto signed my name at Burlington, New Jersey, this 22nd day of April, 1927.. 1 SAMUEL A. NEIDIOH.

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