Lens-fitted photographic film unit

Details Lens-fitted photographic film unit Lens-fitted photographic film unit

1994-11-01

2000-11-28

Adams, Russell

Photography

Disposable or recyclable camera

396 60, 396379, 396380, G03B 1702

Patent

active

061546097

ABSTRACT:
A lens-fitted photographic film unit has a picture frame size changing mechanism for changing the size of picture frames between a full size and a panoramic size. The picture frame size changing mechanism includes upper and lower exposure aperture masking plates which are pivotally mounted in a light-shielding box in front of an exposure aperture. The masking plates are interconnected to each other through one-side contact and urged by a tension spring toward a full size position. The upper masking plate is connected to an operation knob through a crank lever and a switching lever. When the knob is operated to select the panoramic size, the switching lever is moved over a necessary amount for moving the masking plates in a panoramic size position to mask the exposure aperture. After the masking plates are stopped in the panoramic size position by stoppers, the over-stroke of the switching lever is absorbed by resilient bending of the crank lever.

REFERENCES:
patent: 4884087 (1989-11-01), Mochida et al.
patent: 5086311 (1992-02-01), Naka et al.
patent: 5258790 (1993-11-01), Tanaka
patent: 5315331 (1994-05-01), Ohshita
patent: 5353076 (1994-10-01), Goddard
patent: 5400100 (1995-03-01), Alligood
patent: 5410381 (1995-04-01), Kameyama et al.

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