Film rewinding mechanism that fully retracts the film or leaves

Details Film rewinding mechanism that fully retracts the film or leaves Film rewinding mechanism that fully retracts the film or leaves

1988-11-17

1997-08-19

Perkey, W. B.

Photography

With film drive

Double exposure prevention

396410, G03B 100

Patent

active

056598297

ABSTRACT:
A camera system is capable of operating in a number of different photographic modes and includes a display system which provides information relevant to each of the modes. The camera system also includes an automatic film rewinding mechanism that has two modes of operation. In a first, automatic, mode, the tensioning of the film during winding is detected to indicate the end of the roll of film. Upon such detection, the film is automatically and fully rewound into the film cartridge. In a second, user selectable, mode a signal is manually provided by the user to initiate film rewinding. Rewinding of the film is stopped just prior to the time the end of the film enters the cartridge, so that a portion of the film leader remains extended outside of the cartridge.

REFERENCES:
patent: Re34083 (1992-09-01), Kawamura et al.
patent: 4311377 (1982-01-01), Matteson
patent: 4324469 (1982-04-01), Harvey
patent: 4400074 (1983-08-01), Akiyama et al.
patent: 4572636 (1986-02-01), Konno
patent: 4707095 (1987-11-01), Nakano et al.

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