Belt microfilm camera

Details Belt microfilm camera Belt microfilm camera

1979-06-21

1981-02-10

Hix, L. T.

Photocopying

Projection printing and copying cameras

Image transferred from individual documents to film strip

355 71, 355 73, G03B 2732, G03B 2760

Patent

active

042498210

ABSTRACT:
A microfilm camera, typically for 16 mm film, having plural coplanar friction-driven belts. The film is held to the belts by vacuum, so that the film and the belts move together.
Vacuum film-loop chambers allow accurate low-inertia control of the film positioning for exposure.
An intermittently rotatable shutter may be provided for appropriate exposure of the desired image upon the film.
Programmable logic receives data from plural sensors and its controls drive means to correlate significant film movement and stationary periods with the functioning of opto-mechanical elements for exposing the film while it is stationary.

REFERENCES:
patent: 3007368 (1961-11-01), Rosenblum
patent: 3197645 (1965-07-01), Sperry
patent: 3339815 (1967-09-01), Fredkin
patent: 3645619 (1972-02-01), Burton et al.
patent: 3767302 (1973-10-01), Roberts et al.
patent: 3844461 (1974-10-01), Robison et al.
patent: 4007889 (1977-02-01), Langford
patent: 4042298 (1977-08-01), Herrmann

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