Photocopying – Contact printing – Fluid pressure retention of carrier and receiver in exposure...
Patent
1985-08-06
1986-08-26
Wintercorn, Richard A.
Photocopying
Contact printing
Fluid pressure retention of carrier and receiver in exposure...
G03B 2720
Patent
active
046079530
ABSTRACT:
A vacuum exposure registry apparatus holds a thin, image-bearing sheet in intimate contact with a flat photo-sensitive surface while exposing both to a light source to register an image on the photo-sensitive surface. The apparatus includes a flat plate made of rigid transparent material and having a hollow, tubular vacuum fitting extending through the plate near a corner of the plate. A flexible elastomeric tube joinable at its ends to form a continuous perimetral loop is placed around an image-bearing sheet lying on a photo-sensitive surface. The plate is then placed down on the upper surface of the elasomeric tube, with the lower opening of the vacuum fitting within the perimetral boundary defined by the loop. Applying a vacuum to the vacuum fitting evacuates the region within the loop and between the plate and photo-sensitive surface, drawing the surface and overlying image-bearing sheet into tight contact with the underside of the plate.
REFERENCES:
patent: 3066592 (1962-11-01), Ott
patent: 3259046 (1966-07-01), Nishimura
patent: 3507594 (1970-04-01), Rucinski
patent: 4032233 (1977-06-01), Oscarsson
patent: 4089603 (1978-05-01), Jacobs
patent: 4423851 (1984-01-01), Heitmann
Chapin William L.
Wintercorn Richard A.
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