Exposure drum mask

Details Exposure drum mask Exposure drum mask

1992-06-16

1993-09-07

Wintercorn, Richard A.

Photocopying

Contact printing

Exposing on sensitized printing press plate or cylinder

355 73, 355 91, 355104, 355110, G03B 2704

Patent

active

052433790

ABSTRACT:
A mask is used for mounting a sensitized sheet, such as a printing plate, onto the surface of an exposure drum. The mask, acting as an intermediary between the exposure drum and the printing plate, is a flexible sheet, with a top and bottom surface, that is mounted about the exposure drum. A groove formed within the top surface of the flexible sheet is used for securing the printing plate by means of a vacuum. A passageway formed within the flexible sheet connects the groove to the bottom surface and receives a vacuum from the exposure drum. Plates of different sizes are mounted to the exposure drum by interchangeable masks of corresponding sizes.

REFERENCES:
patent: 4262594 (1981-04-01), Landsman
patent: 4298278 (1981-11-01), Katakura et al.
patent: 4707123 (1987-11-01), Ueyama
patent: 4739361 (1988-04-01), Roy et al.
patent: 4899214 (1990-02-01), Robbins et al.
patent: 4949129 (1990-08-01), Fowlkes et al.
patent: 5094164 (1992-03-01), Kowalczyk et al.
patent: 5149082 (1992-09-01), Morita

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