Graphic material registration apparatus and method

Details Graphic material registration apparatus and method Graphic material registration apparatus and method

1989-03-20

1990-04-10

Wintercorn, Richard A.

Photocopying

Contact printing

Fluid pressure retention of carrier and receiver in exposure...

G03B 2720

Patent

active

049164848

ABSTRACT:
Improved method and apparatus for supporting photographic sheet materials in intimate surface contact during contact exposure includes a flexible membrane which forms a common boundary wall between two gas-tight chambers. Air at ambient pressure is admitted to one chamber at a controlled rate slower than air is evacuated from the other chamber containing the photographic sheet materials. Progressive expansion of the surface area of contacting force assures that residual volumes of air between photographic sheets are sneezed out in an orderly pattern and not trapped in isolated pockets that distort resulting photographic images.

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