Contact copying apparatus for reproducing X-ray films and the li

Details Contact copying apparatus for reproducing X-ray films and the li Contact copying apparatus for reproducing X-ray films and the li

1974-08-26

1976-04-27

Wintercorn, Richard A.

Photocopying

Contact printing

Light monitoring exposure control

355 84, 355101, G03B 2778

Patent

active

039531252

ABSTRACT:
A contact copying device includes first and second plates which are spaced from and substantially parallel with each other, one of the plates having a slot therein. A pair of pickup rollers are provided for feeding superposed films, one of which is unexposed and sensitized, and the other of which includes information thereon which is to be exposed onto the unexposed film. The feed rate of the films past the slot is controlled and varied in accordance with the amount of light required to expose the sensitized film by a source of electromagnetic energy spaced from the slot.

REFERENCES:
patent: 2019748 (1935-11-01), Tuttle
patent: 2243048 (1941-05-01), Foster et al.
patent: 3588247 (1971-06-01), Noda
patent: 3605048 (1971-09-01), Sargent
patent: 3722980 (1973-03-01), Craig

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