Transfer apparatus

Details Transfer apparatus Transfer apparatus

G - Physics

03

B

G03B 27/50 (2006.01) G03B 1/60 (2006.01) G03B 27/52 (2006.01) G03B 27/62 (2006.01)

Patent

CA 2146837

As a negative film 2 having a multiplicity of perforations provided therein at equal intervals is being transferred, its perforations are detected with a detecting means 4 which in turn produces a corresponding pulse signal. The pulse signal is then fed to a controller 5 which in turn calculates the number of clock pulses for each 40 pulses of the pulse signal and determines a transfer distance per clock pulse. Meanwhile, the reference transfer distance is obtained from an interval between the perforations x 40. A difference between the actual transfer distance and the reference transfer distance is calculated and used for controlling the rotating movement of drive rollers 3.

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