Photographic film cassette and camera apparatus and method

Details Photographic film cassette and camera apparatus and method Photographic film cassette and camera apparatus and method

1990-07-31

1991-07-16

Mathews, A. A.

354217, 354275, 3542891, G03B 1726, G03B 1736

Patent

active

050328549

ABSTRACT:
A radial bar code providing DX film information is disposed on a disc mounted at an axial end of a film cassette, the disc being rotatable with rotation of the film spool during film extraction and rewind. Film exposure status visual indicators are disposed on the disc and the cassette housing. A stationary optical reader in the camera in association with a logic and control circuit is provided to read the DX information from the rotating disc during film extraction for suitable control of exposure conditions in the camera. During film rewind the angular positioning of the disc can be measured from the bar code to cause the disc to be stopped at the end of rewind with appropriate ones of the status indicators aligned to provide a visual indication of the film exposure status to the camera user.

REFERENCES:
patent: 4349272 (1982-09-01), Holthusen
patent: 4500183 (1985-02-01), Tanikawa
patent: 4693574 (1987-09-01), Ohnuki et al.
patent: 4947197 (1990-08-01), Smart et al.
patent: 4965600 (1990-10-01), Smart et al.
patent: 4978985 (1990-12-01), Smart et al.
patent: 4987437 (1991-01-01), Pagano et al.

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