Control device for an image forming apparatus

Details Control device for an image forming apparatus Control device for an image forming apparatus

1989-07-13

1990-10-23

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355204, 355205, G03G 2100

Patent

active

049656376

ABSTRACT:
A control device for a copier is disclosure which detects an error of a drive system and which drives a photoconductive element. The device includes a motor and uses an output of a toner sensor responsive to the density of a toner image which is formed on the photoconductive element. The control device checks the drive system for an error by computing output data of the toner sensor appearing when the photoconductive element is rotated by the drive system and when it is held in a halted mode.

REFERENCES:
patent: 4502778 (1985-03-01), Dodge et al.
patent: 4505572 (1985-03-01), Ashida et al.
patent: 4583836 (1986-04-01), Taniguchi et al.

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