Photographic film cartridge, lens-fitted film unit for use there

Details Photographic film cartridge, lens-fitted film unit for use there Photographic film cartridge, lens-fitted film unit for use there

1993-10-18

1995-09-19

Gray, David M.

354288, G03B 1726

Patent

active

054520363

ABSTRACT:
A lens-fitted film unit includes a film housing by which photography is effected. The film housing is preloaded with a film cartridge having a shutter rod rotatable within a film passage port. The shutter rod, when in a closed state, blocks the passage port so as to prevent ambient light from entering, and, when in an open state, allows passage of the film. A helical cam groove of the shutter rod cooperates with a stationary pin inside a cartridge-containing chamber, so as to set the shutter rod in the open state while the film cartridge is contained in the film housing. In a preferred embodiment, a bottom door of the film unit is latched by using of a locking lever. The shutter rod is retained open while the bottom door is latched. The bottom door is unlatched by releasing the locking lever, so as to leave the bottom door openable. The shutter rod is rotated in the closed state as soon as the bottom door is unlatched.

REFERENCES:
patent: Re34168 (1993-01-01), Ohmura et al.
patent: 5146255 (1992-09-01), Nakai et al.
patent: 5231438 (1993-07-01), Smart

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