Image forming apparatus having controller adjusting current to m

Details Image forming apparatus having controller adjusting current to m Image forming apparatus having controller adjusting current to m

1994-12-02

1996-09-03

Beatty, Robert

Photocopying

Contact printing

Light boxes

355221, 355274, G03G 2100

Patent

active

055528619

ABSTRACT:
An image forming apparatus is provided with a high voltage transformer provided with one common secondary winding for supplying a high voltage power to a main charger and to a transferring charger, a resistor for sensing a shield current of the transferring charger, an error detecting amplifier for controlling a primary side of the high voltage transformer so that the sensed shield current is constant; a constant voltage device connected to a grid of the main charger for constant-voltage controlling the main charger, and a resistor inserted in a current path to the transferring charger for setting a current supplied from the high voltage transformer to the main charger to be greater than a current supplied from the high voltage transformer to the transferring charger.

REFERENCES:
patent: 4077709 (1978-03-01), Borostyan et al.
patent: 4234249 (1980-11-01), Weikel, Jr. et al.
patent: 4239373 (1980-12-01), Weikel, Jr.
patent: 4896192 (1990-01-01), Kinoshita
patent: 5049935 (1991-09-01), Saito et al.
patent: 5321477 (1994-06-01), Nagata et al.

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