Film exposure indicator and process

Details Film exposure indicator and process Film exposure indicator and process

1992-09-28

1993-11-23

Gellner, Michael L.

G03B 1726

Patent

active

052648869

ABSTRACT:
A system and process are disclosed for providing visual indication that a roll of photographic film has/has not been previously exposed to thereby reduce the likelihood of double exposure or the expense of processing unexposed film. A removable, color coded, plastic strip, cover is provided over at least a portion of the starter tab of film extending from a film canister. The presence of this cover gives visual indication that the film has not been previously exposed and prevents camera loading while in place. Instructions on the cover, or provided separately, warn that the cover should not be removed until ready to load the camera and that the film cannot be loaded until cover removal. The absence of the cover is visual indication that the film probably has been exposed. Additional exposure indicia may also be employed on the film canister and/or on the tab extension and is obscured from view when the color coded cover is in place.

REFERENCES:
patent: 3768894 (1973-10-01), Cook
patent: 4418037 (1983-11-01), Katsuyama
patent: 4758851 (1988-07-01), Zeth
patent: 4860892 (1989-08-01), Roberts
patent: 4876123 (1989-10-01), Rivera
patent: 4887110 (1989-12-01), Harvey
patent: 4894673 (1990-01-01), Beach
patent: 4965600 (1990-10-01), Smart et al.
patent: 5047794 (1991-09-01), Pagano et al.

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