Photocopying – Contact printing – Fluid pressure retention of carrier and receiver in exposure...
Patent
1993-12-21
1995-01-17
Wintercorn, Richard A.
Photocopying
Contact printing
Fluid pressure retention of carrier and receiver in exposure...
G03B 2720
Patent
active
053830032
ABSTRACT:
The device according to the invention includes a chassis (3) comprising a working surface (6) designed to support the photosensitive film (1); a frame (11) connected to the chassis by a hinge pin (19) and comprising a central opening (18); a removable plate (20) capable of being immobilized against the lower face (13) of the frame (11) and comprising a window (21) designed to be blocked by an original (2); an annular seal (36) mounted on the chassis (3) about the working surface (6); a chamber delimited by the seal, as well as by the working surface (6) and the removable plate (20) when the frame (11) presses the latter against the chassis; vacuum-creating means for creating a negative pressure in the chamber; and a light source for printing the film through the original.
REFERENCES:
patent: 2842037 (1958-07-01), Gobeille et al.
patent: 3147683 (1964-09-01), Hulen
patent: 4322161 (1982-03-01), Mohr
patent: 4536085 (1985-08-01), Hliboki et al.
patent: 4664511 (1987-05-01), Carlson et al.
patent: 4711570 (1987-12-01), Nelen
patent: 4827316 (1989-05-01), Brown
patent: 4967230 (1990-10-01), Meacham
patent: 5255052 (1993-10-01), Ternes et al.
Patent Abstracts of Japan; vol. 12, No. 363, Sep. 1988, JP 63-115155.
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