Photographic film cassette having bowed spring with device preve

Details Photographic film cassette having bowed spring with device preve Photographic film cassette having bowed spring with device preve

1979-04-04

1980-02-12

Hayes, Monroe H.

Optics: motion pictures

With film treating or working

352221, 354 85, 354 88, G03C 1100

Patent

active

041880986

ABSTRACT:
A photographic film cassette having a bowed spring yieldably biasing a pressure pad for supporting a film strip so that the latter is held in sliding engagement with a fluid processor nozzle. Spring support members formed on the cassette housing wall support opposing ends of the bowed spring so as to longitudinally position it, as well as engage other spring portions during spring deflection to prevent overstressing of the spring. The invention embodies a method of preventing overstressing of the deflected bowed spring while facilitating an increase in the spring force after a preselected deflection thereof.

REFERENCES:
patent: 3707116 (1972-12-01), Gold
patent: 3798669 (1974-03-01), Bachelder
patent: 3895862 (1975-07-01), Stella et al.
patent: 3951530 (1976-04-01), Czumak et al.
patent: 4016582 (1977-04-01), Wareham

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