US3066679A - Jacket used in copy making - Google Patents

Description

Dec. 4, 1962 D. R. HURLEY ETAL JACKET USED IN COPY MAKING Filed March 11, 1960 INVENTOR.

DAIiI EL R. HURLEY 8 JOHN F. MC HUGH United States Patent M 3,066,679 JACKET USED IN COPY MAKING Daniel R. Hurley, Cincinnati, Ohio, and John F. McHugh,

Brooklyn, N.Y., assignors to Interchemical Corporation, New York, N.Y., a corporation of Ohio Filed Mar. 11, 1960, Ser. No. 14,290 1 Claim. (Cl. 1291) The present invention relates to a new and useful article of manufacture; more specifically the invention relates to an improved jacket for use in making copies of graphic originals such as letters, charts, etc.

In recent years a method of making copies of letters, charts, etc. has been Widely commercialized wherein letters, etc. that have graphic representations that will absorb light and infrared radiation and convert it to heat, are reproduced onto heat-sensitive paper. The thermographic copying method involves exposing the original and the heat-sensitive copy, in heat conductive relationship to each other, to a strong source of radiation rich in infrared radiation. The heat produced by the graphic representations on the original develops an exact copy of the original on the heat-sensitive copying sheets. The method is more fully described in U.S. Patents No. 2,859,351 and No. 2,859,352. An apparatus specifically designed for carrying out the thermographic copying method is described in U.S. Patent No. 2,859,352 and is available as the Ther-mo-Fax Machine from Minnesota Mining and Manufacturing Company. Heat-sensitive paper for use in making copies in the Thermo-Fax Machine can be produced in a variety of ways and numerous patents have issued covering such papers.

Recommended procedure for using the Thermo-Fax machine is to employ a jacket to hold the original to be copied and the heat-sensitive copy sheet in heat-conductive relationship as they pass thru the copying machine. The jacket consists of a sheet of relatively stiff white paper and a sheet of visibly transparent silk screen of equal length and width fastened together along their upper edges to form the jacket. The present invention is concerned specifically with improvements in this jacket.

:In accordance with the invention an improved jacket is produced by making the bottom portion of the transparent silk sheet more rigid by adding additional stififening agents at this point. This improvement facilitates use of the jacket in that it is easier to separate the paper backing and the screen for insertion of the original and the heat sensitive copy sheet. Further, the stiffened lower 3,066,679 Patented Dec. 4, 1962 edge of the silk screen substantially completely overcomes any tendency of the screen to roll up or fold back at the corners. A further improvement provided by the invention is the printing of instructions for use on the paper sheet portion of the jacket. I have discovered, for instance, that instruction for use can be printed on paper so as to be visible through the silk screen and will not adversely affect the functioning of the jacket. It is necessary that a non-infrared absorbing ink be used to print the instruction. Red inks are preferred. Further, glassine may be used in place of silk in the transparent screen.

The invention will be more clearly understood by referring to the accompanying drawing wherein FIGURE 1 illustrates the embodiment of the invention without the printed instructions on the paper, sheet backing and FIGURE 2 illustrates the embodiment of the invention having printed instructions on the paper sheet backing.

In the drawing, a relatively heavy paper backing sheet 11 is attached at 12, preferably using an adhesive, to a transparent silk screen 13. Silk screen 13 has a stiffened lower edge 14, the stiffened portion being preferably /2 to inch wide for jackets to be used with ordinary letter size and legal size stationery. The stiifened portion is preferably made by adhering a strip of heavy paper to the screen. In the embodiment shown in FIGURE 2, the instructions for use are shown at 15. These instructions are preferably printed in red ink and have the advantage that they are always visible and available when needed; i.e., when the jacket is to be used in the thermographic copying process.

What is claimed is:

As an article of manufacture, a jacket for use in making copies of graphic originals by the thermographic copying technique, said jacket comprising a backing sheet of relatively stiff paper attached along its upper end to a transparent silk screen of the same width and length, said screen having a narrow stiffened portion attached to its lower end to facilitate use of the jacket, and said backing sheet having printed thereon, in a non-infrared absorbing ink so as to be visible through the screen, instructions for the use of the jacket.

Roehm Dec. 22, 1953 Miller Apr. 3, 1956

Images