Lens-fitted photo film unit

Details Lens-fitted photo film unit Lens-fitted photo film unit

1997-09-19

1999-02-23

Gray, David M.

Photography

Disposable or recyclable camera

396396, G03B 1724

Patent

active

058753567

ABSTRACT:
A lens-fitted photo film unit is pre-loaded with a photo film of a predetermined length. The photo film is retained on a spool. A winder wheel is connected to the spool. After each frame is exposed on the photo film, the winder wheel is manually rotated to wind the photo film into a cassette shell about the spool. In the lens-fitted photo film unit, a combination of a detector cutout and a protruded portion detects that the winder wheel has made a predetermined number of rotations, which depends upon the predetermined length of the photo film. A combination of a recess and a protruded portion locks rotation of the winder wheel in response to rotation of the winder wheel to a predetermined rotational position after the predetermined number of the rotations of the winder wheel. The winder wheel is inhibited from being rotated after the photo film is entirely wound into the cassette shell.

REFERENCES:
patent: 5652933 (1997-07-01), Zander

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