Photographic film cassette incorporating a film lock

Details Photographic film cassette incorporating a film lock Photographic film cassette incorporating a film lock

1978-04-03

1979-04-10

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

G03B 104

Patent

active

041484495

ABSTRACT:
The present invention relates to a photographic film cassette comprising a feed compartment and a take-up compartment, which communicate through a slot like film passageway with an exposure station inbetween. The film side wall of the film passageway to the take up compartment is provided with a depression which continuously tapers in its width and which runs out to the original surface in its depth.
A side wall of the depression is undercut to engage with a widening end of the film to prevent the film from being completely drawn into the take-up compartment. A projection is provided on the paper chafing patch side wall of the exit of the film passageway to the take-up compartment to help putting the film in the depression.

REFERENCES:
patent: 3705696 (1972-12-01), Edwards
patent: 3944154 (1976-03-01), Hahn
patent: 3955771 (1976-05-01), Ishii

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