Method of controlling charge voltage of image forming apparatus

Details Method of controlling charge voltage of image forming apparatus Method of controlling charge voltage of image forming apparatus

1997-03-18

1998-11-17

Grimley, Arthur T.

Electrophotography

Internal machine environment

Particle or contaminant control

399174, G03G 1502

Patent

active

058390260

ABSTRACT:
A method of controlling a charge voltage of an image forming apparatus using an electrophotographic developing process so as to enhance cleaning efficiency by increasing the number of collecting positively-charged toner adhering to contact charging unit. The method includes: applying a charge voltage of a predetermined voltage level to a contact charging unit to uniformly charge an outer surface of a photoconductive body to a predetermined polarity while a main motor rotates; when cleaning the contact charging unit, applying a charge voltage exhibiting a voltage level lower than the predetermined voltage level to the contact charging unit to create a potential difference between the contact charging unit the photoconductive body; and transferring charged toner particles adhered to the contact charging unit, to the photoconductive body by shutting off the charge voltage being applied to the contact charging unit.

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