Electrophotographic printer and method for controlling the same

Details Electrophotographic printer and method for controlling the same Electrophotographic printer and method for controlling the same

1993-03-09

1994-11-01

Miller, Jr., George H.

Recorders

Electric recording

Electrochemical

346160, G01D 1506, G01D 1514

Patent

active

053610881

ABSTRACT:
An electrophotographic printer capable of changing its printing speed includes a change signal generating circuit for generating a speed change signal, a head scan cycle setting circuit for setting a cycle time of a scan line of an LED array head, and a motor speed setting circuit for setting a rotation speed of a photosensitive drum. Since the head scan cycle setting circuit and the motor speed setting circuit are activated in response to the speed change signal outputted from the change signal generating circuit, the operations of the photosensitive drum and the LED array head are synchronized with each other, so that the printer can print a fine image on a recording medium. The printer control unit including those circuits also includes control circuits for controlling a constant current supplied to a transfer roller, and for controlling a temperature of fixing rollers, to avoid unevenness of printing.

REFERENCES:
patent: 5043749 (1991-08-01), Punater et al.

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