Motor-driven film transporting device for cameras

Details Motor-driven film transporting device for cameras Motor-driven film transporting device for cameras

1992-05-27

1994-04-05

Gellner, Michael L.

354214, G03B 118, G03B 100

Patent

active

053009754

ABSTRACT:
A motor-driven film rewinder rewinds a roll of film loaded into a cassette and wound up on a film take-up spool of a camera. A signal generator generates a film movement signal as the film moves. A film movement stoppage detector is connected to the signal generator to output a film movement stoppage signal when no film movement signal is output from the signal generator for a first reference period of time. A motor controller is responsive to the film movement stoppage signal from the film movement stoppage detector to stop the operation of the motor-driven film rewinder. A timer starts a time count operation at a point of time at which the motor-driven film rewinder begins a film rewinding operation and keeps the film rewinder performing the film rewinding operation for a second reference period of time longer than the first reference period of time. The motor controller operates after a lapse of the second reference period of time. That is, at the time of a film rewind operation, the motor-driven film rewinder keeps operating for the second reference period of time regardless of whether the film is transported or not. After a lapse of the second reference period of time, the motor-driven film rewinder is stopped at a point of time at which the first reference period of time elapses from when the film movement is stopped.

REFERENCES:
patent: 4437163 (1984-10-01), Matsumoto et al.
patent: 4494842 (1985-01-01), Kimura et al.
patent: 4572637 (1986-02-01), Inoue
patent: 4679926 (1987-07-01), Suzuki et al.
patent: 4728976 (1988-03-01), Takahashi et al.
patent: 4752793 (1988-06-01), Kawamura
patent: 4945370 (1990-07-01), Shimada et al.

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