Film transport method and apparatus

Details Film transport method and apparatus Film transport method and apparatus

1982-07-28

1984-10-02

Gellner, Michael L.

G03B 112

Patent

active

044744420

ABSTRACT:
An automatic film winding mechanism and method generates a series of pulses for each unit movement amount of the film, computes the speed of the film advancing movement, compares the speed to a stored look-up table for determining the precise point at which power to the film drive motor should be shut off, in order to have the advancement of the film come to a complete stop at a predetermined film transport distance. The invention thereby allows the film to be advanced to the exact transport distance regardless of the output and voltage fluctuation of the film drive power source, or of the film variation or load variation of the motor caused by a change in ambient temperature or other conditions.

REFERENCES:
patent: 4339187 (1982-07-01), Matsuura et al.

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