Film positioning mechanism for a microfilm camera

Details Film positioning mechanism for a microfilm camera Film positioning mechanism for a microfilm camera

1977-06-29

1979-01-16

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Producing plural rows of pictures on photosensitive paper

354124, 355 75, G03B 2744

Patent

active

041346750

ABSTRACT:
A film positioning mechanism for a microfilm camera includes a movable platen 12 mounting a rotary shaft member 19, 22 and brake means 23, 28 for selectively locking the shaft member against rotation. When the brake means is engaged, a film strip held to the platen by vacuum pressure is advanced along with the platen by a drive motor 14, whereas when the brake means is disengaged from the shaft member and the platen is arrested by a stop pin 31 or 31', a film driving roller 25 is driven by the motor 14 via the shaft member and a belt 24, thereby advancing the film while the platen remains stationary. Thus, a single motor both feeds the film and moves the platen. The mechanism can operate in both a roll-to-roll mode and a roll-to-sheet mode, the latter employing a film cutter 49, 50.

REFERENCES:
patent: 3746444 (1973-07-01), Kahle et al.
patent: 3767302 (1973-10-01), Roberts et al.
patent: 3994581 (1976-11-01), Hopkins et al.
patent: 4037955 (1977-07-01), Jamieson et al.

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