Film transport apparatus

Details Film transport apparatus Film transport apparatus

1987-10-13

1989-05-30

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With film engaging claws reciprocally driven to engage film

352225, 352227, G03B 122, G03B 148

Patent

active

048355550

ABSTRACT:
A film transport mechanism for an optical printer in which the film is positively clamped and laterally tensioned at the position of the aperture between each film advance step, so that the film lies absolutely flat in the focal plane of the lens system of the printer during exposure. This is achieved by providing registration pins and a pressure pad at one side of the film and a curved blade at the other side that move towards and clamp the film. The blade progressively tensions the film laterally against the pressure pad and registration pins.

REFERENCES:
patent: 2192692 (1940-03-01), Nerwin
patent: 3776626 (1973-12-01), Lewis
patent: 3914035 (1975-10-01), Satterfield

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