Photocopying – Contact printing – Fluid pressure retention of carrier and receiver in exposure...
Patent
1975-03-25
1977-07-26
Tomsky, Stephen J.
Photocopying
Contact printing
Fluid pressure retention of carrier and receiver in exposure...
355104, 355110, G03B 2720
Patent
active
040379574
ABSTRACT:
Method for the production of a serigraphic screen by the photochemical method, characterized by the fact that, starting from a blank tubular screen obtained by tubular weaving or by closing a flat fabric on itself, one at least of the faces of the screen is coated with a photosensitive film, against the screen is placed a transparent tubular masking film bearing the design to be printed in ink in opaque zones, stretching the masking film and the screen axially and radially, under the conditions of tension wherein the finished screen will be used for the printing, urging the screen and the masking film against one another, and exposing to actinic rays, on the side of the masking film, the assembly of the superimposed masking film and screen, the photosensitive film being then removed by washing in the zones of the screen covered by the opaque zones of the masking film during exposure, while it remains in the irradiated zones.
REFERENCES:
patent: 3574460 (1971-04-01), Snaper
patent: 3622241 (1971-11-01), Dexter
patent: 3639060 (1972-02-01), Jaskowsky
patent: 3694080 (1972-09-01), Malsky
patent: 3728024 (1973-04-01), Nagai
Tomsky Stephen J.
Vitos Etablissements Vitoux
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