Film cassette with bar-coded film spool and provision for film d

Details Film cassette with bar-coded film spool and provision for film d Film cassette with bar-coded film spool and provision for film d

1993-11-30

1994-09-13

Blankenship, Howard B.

G03B 1726

Patent

active

053473345

ABSTRACT:
A photographic film cassette is provided with a radial bar coded disk having first and second arcuate segments of differing radial lengths to form a gap between the disk and a circumferential lip of the cassette housing. When the cassette is removed from a camera after the film has been fully or partially exposed, the gap is positioned so as to align with a double exposure prevention hook in the camera. During a subsequent attempt to insert the cassette into the camera, the hook enters the gap and engages the housing lip to thereby prevent complete insertion of the cassette.

REFERENCES:
patent: 4998123 (1991-03-01), Smart
patent: 5030978 (1991-07-01), Stoneham et al.
patent: 5032854 (1991-07-01), Smart et al.
patent: 5032861 (1991-07-01), Pagano
patent: 5122820 (1992-06-01), Pagano et al.

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