1993-05-17
1995-01-10
Blankenship, Howard B.
354288, G03B 910, G03B 1702
Patent
active
053812000
ABSTRACT:
A lens-fitted photographic film unit is provided with a shutter blade having a claw portion and a masking portion for opening and closing a shutter opening formed in the front surface of the base section of the film unit. The shutter blade is bent between the claw portion and the masking portion in a crank-shape such that the claw portion is swung in a rearward plane different from that of the masking portion, making it possible to form the film unit thinner. In a preferred embodiment, the masking portion is provided on its rear with a recess having a tapered surface. During swinging, the tapered surface will not be in contact with the projection surrounding the shutter opening, enabling smooth swinging of the shutter blade, when the shutter blade is in the closed position, the projection fits in the recess. The shutter blade is formed on an edge portion with a protrusion for opening and closing a stop aperture. In the closed position, half of the masking portion is surrounded by a semicircular light-shielding member.
REFERENCES:
patent: 3709135 (1973-01-01), Simon et al.
patent: 3713374 (1973-01-01), Shiratory et al.
patent: 4755842 (1988-07-01), Barclay et al.
patent: 4884087 (1989-11-01), Mochida et al.
patent: 5063400 (1991-11-01), Takei et al.
patent: 5084719 (1992-01-01), Hara et al.
patent: 5181057 (1993-01-01), Takagi et al.
Blankenship Howard B.
Fuji Photo Film Co. , Ltd.
Noh Jae N.
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