Copying process timing control system for electrophotographic co

Details Copying process timing control system for electrophotographic co Copying process timing control system for electrophotographic co

1985-09-03

1989-08-22

Braun, Fred L.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

377 17, 364142, 355204, G03G 1500

Patent

active

048600512

ABSTRACT:
A copying timing counting system for counting the rotation angle of a photoreceptor drum in an electrophotographic copying machine comprises a pulse generator, and a pulse counter. The pulse counter is responsive to the pulse generator for counting both the pulse rising edge and the pulse falling edge. Since the counter can count both the pulse rising edge and the pulse falling edge, the resolving power of the photoreceptor drum can be doubled as compared with the detection system of either of the pulse rising edge or the pulse falling edge taken alone.

REFERENCES:
patent: 3543110 (1968-04-01), Ruof
patent: 4072415 (1978-02-01), Inoue et al.
patent: 4203663 (1980-05-01), Ogura et al.
patent: 4215931 (1980-08-01), Tsuda et al.
patent: 4270860 (1981-06-01), Tsuda et al.
patent: 4299476 (1981-11-01), Kawatsura et al.
patent: 4591969 (1986-05-01), Bloom et al.

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