Lens-fitted photo film unit and method of unloading a cassette f

Details Lens-fitted photo film unit and method of unloading a cassette f Lens-fitted photo film unit and method of unloading a cassette f

1996-12-16

1997-09-16

Mathews, A. A.

Photography

Disposable or recyclable camera

396513, 396538, G03B 1702, G03B 1726

Patent

active

056690185

ABSTRACT:
A lens-fitted photo film unit includes a cassette containing chamber and a photo film roll chamber. The cassette containing chamber contains a cassette. The photo film roll chamber contains a roll of unexposed photo film drawn out of the cassette. The cassette incorporates a photo film port shutter rotatable between a closed position to block a photo film passage port and an open position to open the photo film passage port. The photo film is wound into the cassette by one frame after an exposure is taken thereon. A rotating member is connected to the port shutter and rotatable between a first position associated with the open position of the port shutter, and a second position associated with the closed position of the port shutter. The rotating member is disconnected from the port shutter at a time of moving the cassette in the cassette containing chamber for unloading the cassette from the cassette containing chamber. A torsion coil spring rotates the rotating member from the first position to the second position in response to external operation effected prior to moving the cassette in the cassette containing chamber. The cassette is unloaded from the cassette containing chamber after the photo film is wound therein.

REFERENCES:
patent: 5452036 (1995-09-01), Kamata
patent: 5495310 (1996-02-01), Takatori
patent: 5579070 (1996-11-01), Smart et al.
patent: 5602609 (1997-02-01), Balling

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