Duplicating machine exposure system

Details Duplicating machine exposure system Duplicating machine exposure system

1974-07-03

1976-06-29

Hix, L. T.

Photocopying

Contact printing

Light boxes

355115, 355120, G03B 2704

Patent

active

039663213

ABSTRACT:
An exposure system for a microfiche duplicating machine includes a mercury vapor light source and a light transparent platen disposed above the light source for supporting an original microfiche card and a duplicating film card for exposure by the light source. A shutter mechanism is interposed between the light source and the transparent platen to control the exposure of the duplicating film card, and a cover is disposed over the transparent platen to prevent the escape of light from the duplicating machine during the exposure. A mechanical linkage is provided for automatically opening a pair of shutters within the shutter mechanism upon the closing of the cover to initiate the exposure of the duplicating film card. Simultaneously, a timer is energized by the closing of the cover to initiate an exposure timing sequence. Upon completion of the timing sequence, a timer energized by a solenoid actuator releases the cover, and the shutters are automatically closed by the mechanical linkage to terminate the exposure.

REFERENCES:
patent: 1004670 (1911-10-01), Miller
patent: 3140645 (1964-07-01), Block et al.
patent: 3642376 (1972-02-01), Halvorsen et al.
patent: 3738748 (1973-06-01), Weihsmantel

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