Process of screen manufacture and use for coding credit cards

Details Process of screen manufacture and use for coding credit cards Process of screen manufacture and use for coding credit cards

1974-03-18

1976-10-26

Burr, Edgar S.

Printing

Stenciling

Stencils

101123, 1011271, 1011283, 101129, 101DIG18, B41C 114, B41N 127

Patent

active

039877256

ABSTRACT:
A process for forming credit cards in which encoded information is screen printed on a plastic sheet. In the process, a photographic film is placed in contact with a surface having film exposure means positioned with respect to the surface. Locating means are formed on the film and the film is positioned on the surface through the locating means. Thereafter, small predetermined coded spaces are exposed on the film and the exposed film is developed to provide coded darkened spaces corresponding to the exposed coded spaces.
The developed film is placed against a silk screen having first positioning means which coact with the locating means on the film to position the film with respect to the silk screen. The screen is coated with a light-sensitive emulsion and light is shone on the screen through the film to expose the emulsion except at the coded darkened areas.
The screen is washed to provide a coded screen having openings corresponding to the exposed coded spaces on the film. The coded screen is placed in a silk screen press with second positioning means corresponding in placement to the first positioning means. The screen is placed in the press by alignment of the second positioning means with the first positioning means. Ink is passed through the openings in the screen onto a credit card sheet to form screen printed coded spaces on the sheet.
The encoded spaces on the sheet may be printed by using multiple printings.

REFERENCES:
patent: 2630755 (1953-03-01), Herrin
patent: 2969732 (1961-01-01), Kendall
patent: 3000104 (1961-09-01), Polayes
patent: 3356023 (1967-12-01), Schuttenberg
patent: 3453598 (1969-07-01), Schweizer
patent: 3507654 (1970-04-01), Wrench
patent: 3716296 (1973-02-01), Springer et al.

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