US2228281A - Transferable material for surface shading sheets - Google Patents

Description

Jan. 14, 1941.

CHEBON BLACK T. L. MADDOCK TRANSFERABLE MATERIAL FOR SURFACE SHADING SHEETS Original Filed April 26, 1938 ATTORNEYS)" Patented Jan. 14, 1941 UNITED STATES PATENT OFFICE.

TRAN SFERABLE MATERIAL FOR SURFACE SHADING SHEETS Theodore L. Maddock, Cleveland, Ohio, assignor' to Fine Art Manufacturing Company, Cleveland, Ohio, a corporation of Ohio Original application April 26, 1938, Serial No.

204,343. Divided and this application November 23, 1938, Serial No. 242,047

2 Claims My prior application, Serial No. 204,343, filed April 26, 1938, shows and describes a Method and means for shading surfaces, comprising causing isolated areas of transferable material regularly transferable material adapted to be affixed to the transparent cellulose sheet.

The application mentioned describes a sheet 20 of Cellophane, preferably laminated in different directions to prevent curling, and a black transferable substance adapted to be applied to such sheet'by a pressing operation, and sets out in detail the composition of the transferable substance. However, I have found that a unitary sheet of thermo-plastic material comprising a film of cellulose acetate similar to the film used for photographic negatives, is preferable to a laminated Cellophane sheet. Such cellulose film 30 with the transferable material applied thereto in regular isolated areas forms the subject matter of an application of mine Serial No. 242,011, filed November 23, 1938, which is a continuation in part of said application No. 204,343.

35 It will be understood that the sheet employed is tough, flexible and transparent, and by causing proper transferable material to adhere toiit, I may use the sheet as an impression member,

placing it over the drawing or other matter to be m shaded, then by pressure of the artist's pencil on top of the sheet, transfer shaded material to the underlying surface.

Not only has there been difficulty in securing a material which will adhere to the sheet with 45 sufficient rigidity so that it will not be inadvertently displaced or rubbed off in storage, but will not adhere so firmly as to prevent transfer, and which will not deteriorate or become hard or glossy with time. After considerable experiment- 50 mg, I have discovered a composition which may ,be handled like printers ink and applied by a printing operation to thecellulose or Cellophane film, and which will notspread after being printed thereon, and will become comparatively dry and effectively retain its position on the sheet, but which may be transferred to the underlying sheet by pressure on top of the film. I

The transferable material employed on ordinary carbon sheets used in typewriting, etc., will not adhere to Cellophane or to other cellulose acetate film. On the other hand, the inks which I have been developed for printing on Celluloid,

Cellophane and other synthetic sheets, will not 1 offset.

I have found that I can accomplish excellent results by employing the following composition,

which forms the subject matter of this application, as specified in the claims, namely:

Parts Ester g m Linseed varnish Carbon black Orange toner Carnauba w The above materials are ground together to make a composition of consistency similar to or-- dinary printers ink. This material is placed in the' fountain of a suitable press, and an imprint is made on the film by anengraved roller carrying whatever figure is to be imprinted, as, for instance, the dots or parallel lines. After the imprinting substance has been allowed to dry, the cellulose sheet carrying the same is secured face down on the protection sheet, and the product is ready for use. I

The drawing is a diagram illustrating the composition, the primary ingredients being indicated by full lines, and an optional, though preferred ingredient indicated by broken lines.

I claim:

1. A composition of substantially fpiir parts ester gum, eight parts of linseed varnish, four parts of carbon black and one part of carnauba 4o wax of a consistency enabling it to adhere to a sheet of transparent material of the group containing Cellophane and cellulose acetate, and be un-com transferable therefrom at ordinary temperature by pressure on the back of the sheet. 5

2. A composition adapted for printing on a sheet of celluloseacetate, to adhere thereto but be transferable therefrom at ordinary temperature by pressure, comprising substantially four parts ester gum, eight parts linseed varnish, four parts carbon black. one part carnauba wax and two parts orange toner.

" THEODORE L.

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