Film cassette dark slide incorporating a projection for restrain

Details Film cassette dark slide incorporating a projection for restrain Film cassette dark slide incorporating a projection for restrain

1993-09-08

1994-09-06

Gellner, Michael L.

G03B 1726

Patent

active

053452895

ABSTRACT:
A dark slide is located within a film cassette to shield film units from exposure to light prior to the insertion of the cassette into a camera. The slide is maintained in position within the exposure opening of the cassette by a truncated ridge struck from the slide to project above its upper surface. The struck portion of the slide is configured to engage an abutment in the forward wall of the film cassette to prevent the premature ejection of the dark slide as a result of impacts on the cassette and to collapse and thereby disengage from the abutment when the slide is ejected from the camera by a film unit advancing pick.

REFERENCES:
patent: 3988755 (1976-10-01), Vogel
patent: 4392731 (1983-07-01), Van Heyningen
Japanese Utility Model Application Laid-Open No. 01-75231, laid-open date May 22, 1989, entitled, "Film Pack".

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