Photographic exposure apparatus

Details Photographic exposure apparatus Photographic exposure apparatus

1979-02-09

1980-07-15

Wintercorn, Richard A.

Photocopying

Contact printing

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

355103, G03B 2720

Patent

active

042125332

ABSTRACT:
A photographic exposure unit for making a reproduction of non-dimensional engineering drawings to very close tolerances. The original drawing and the film are driven by a travelling vacuum system through a light exposure unit. In all cases, the exposure is made while the original drawing and film are held in close contact one against the other during their conjoint passage through a flat exposure area.

REFERENCES:
patent: 2408310 (1946-09-01), Hassler
patent: 3468606 (1969-09-01), Wolf et al.
patent: 3606536 (1971-09-01), Beispel
patent: 3740140 (1973-06-01), Wolf et al.
patent: 3814519 (1974-06-01), Zeunen et al.
patent: 4065210 (1977-12-01), Milburn

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