Film transporting system including a counter and a film existenc

Details Film transporting system including a counter and a film existenc Film transporting system including a counter and a film existenc

1993-06-04

1994-09-20

Gellner, Michael L.

354214, 354217, G03B 118, G03B 1736

Patent

active

053494075

ABSTRACT:
A film transporter is coupled to a counter which counts the number of used film frames. A film detector detects a film when the count signal is "0," i.e., a state where the counter for counting the number of used film frames is reset. When it is detected that the camera has no film roll loaded therein, the film transporter is disabled to advance or rewind the film roll. There is provided a film travel detector adapted to stop further travel of the film roll after the number of pulses output every time the film roll travels by one frame has reached a predetermined number and, when the camera has the film roll loaded therein, the predetermined number is changed depending whether the count signal is "0," so that a common control system effects initial film advance and advance of each frame following the initial film advance.

REFERENCES:
patent: 4561741 (1985-12-01), Ishizaka et al.
patent: 5028944 (1991-07-01), Kobayashi et al.
patent: 5032854 (1991-07-01), Smart et al.

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