Pull strip guide for multipurpose film cassettes

Details Pull strip guide for multipurpose film cassettes Pull strip guide for multipurpose film cassettes

1977-04-26

1978-08-29

Hayes, Monroe H.

Optics: motion pictures

With film treating or working

242199, G03C 1100

Patent

active

041100182

ABSTRACT:
A multipurpose motion picture film cassette is provided of the type wherein rewinding the film strip after exposure results in attachment of a pull strip to the film strip and subsequent advancement of the pull strip, as rewinding continues, to effect the removal of a tear tab closure which releases film processing fluid from an initially sealed storage reservoir. The pull strip is initially supported and constrained to an essentially S-shaped tortuous path having at least two turning points about which the pull strip passes when being advanced by the film strip. The pull strip is supported at each of its turning points by a cylindrical roller which in turn is supported by an arcuate surface having a radius of curvature substantially equal to that of the outer surface of the roller. The arcuate surfaces are arranged and sized such that they support the rollers for relative rotation therewith when the pull strip is advanced thereby.

REFERENCES:
patent: 1275715 (1918-08-01), Makutchan
patent: 2142474 (1939-01-01), Langhaar
patent: 3921190 (1975-11-01), Ell et al.

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