Self-developing motion picture viewer having controlled film imb

Details Self-developing motion picture viewer having controlled film imb Self-developing motion picture viewer having controlled film imb

1977-04-26

1978-10-10

Adams, Russell E.

Optics: motion pictures

With film treating or working

352 92, G03C 1100

Patent

active

041193709

ABSTRACT:
A programmable viewing system for processing and viewing cassette contained photographic film strips, in which the film is driven through forward and rewind advancement for film development operations and then automatically projected and again rewound, includes an electronic switching arrangement for de-energizing the system drive motor at the termination of the development rewind to prevent cinching or stressing of the film strip on the spool while developing fluid reacts with the exposed emulsion. Then the motor is automatically turned on again after completion of the fluid reaction period.

REFERENCES:
patent: 3771861 (1973-11-01), Land
patent: 3893756 (1975-07-01), Scholz
patent: 3941465 (1976-03-01), Figge et al.

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