1977-08-08
1979-03-27
Griffin, Donald A.
354159, 354275, G03B 1700, G03B 1702, G03B 1726
Patent
active
041463218
ABSTRACT:
A film cartridge includes two like film spools in a pair of symmetrical casings held in a spaced relationship by support means such as a side support bar or a hinged reusable cartridge case. An opening in the back of the cartridge between the two casings permits the pressure plate inside the back cover of the camera to hold the film tightly against the film aperture guide. The ends of the film are attached to both spools and the cartridge is reversible to permit exposures along two separate rows across the width of the film. Cooperating aperture and viewing masks limit the exposures to each row in succession as the film is advanced and then reversed. Larger rectangular or square frames across the width of the film may also be used without reversal of the film. The side openings in the cartridge case and extensions on both ends of the spools are symmetrical so that either side can engage the film driving mechanism. The usual sprocket gear, built in spool, and need for rewinding of a standard 35mm camera are eliminated, as well as the film sprocket holes, to permit utilization of larger areas of the film and simplification of the camera construction.
REFERENCES:
patent: 684221 (1901-10-01), Gill
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patent: 3440943 (1969-04-01), Sauer
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patent: 3482681 (1969-12-01), Nerwin et al.
patent: 3678834 (1972-07-01), Melillo
patent: 3745899 (1973-07-01), Walther
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