Cleaning method for contact charging means in image forming appa

Details Cleaning method for contact charging means in image forming appa Cleaning method for contact charging means in image forming appa

1995-11-01

1996-07-30

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355296, G03G 2100

Patent

active

055417175

ABSTRACT:
A cleaning method for a contact type charger in an cleanerless image forming apparatus. The method includes a step of switching bias voltages applied to the contact type charger and a develop/cleaning device from first level to a second level so as to release developer adhering to the contact type charger onto an image-bearing member as well as to collect a part of the developer moved onto the image-bearing member by the developing/cleaning device, and a step of switching the bias voltage from the second level to the first level so as to collect the rest of the developer released onto the image-bearing member by the develop/cleaning device.

REFERENCES:
patent: 4470693 (1984-09-01), Dolan
patent: 4763168 (1988-08-01), Lindblad
patent: 5148219 (1992-09-01), Kohyama
patent: 5371578 (1994-12-01), Asano et al.

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