Image forming apparatus

Details Image forming apparatus Image forming apparatus

2005-11-15

2005-11-15

Ngo, Hoang (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

C399S066000, C399S301000

Reexamination Certificate

active

06965742

ABSTRACT:
An image forming apparatus which can prevent the electric discharge when the trailing edge of a recording material passes a transferring position, and yet can stabilize the surface potential of a photosensitive drum. A controller changes a transfer bias voltage Vt during the supply of paper to 0 V before the trailing edge of recording paper arrives at a transferring nip part, changes it to a transfer bias voltage V0during the non-supply of paper after the trailing edge of the recording paper has passed the transferring nip part, and changes a charging bias voltage to a charging bias voltage smaller than a normal charging bias voltage when an area on the photosensitive drum to which 0 V has been applied passes a charging nip portion. The transfer bias voltage V0during the non-supply of paper is smaller than the transfer bias voltage Vt during the supply of paper.

REFERENCES:
patent: 5410393 (1995-04-01), Watanabe
patent: 5519475 (1996-05-01), Miyamoto et al.
patent: 5862435 (1999-01-01), Suzumi et al.
patent: 5991555 (1999-11-01), Suzumi et al.
patent: 6085058 (2000-07-01), Goto et al.
patent: 6477348 (2002-11-01), Miyamoto et al.
patent: 6493521 (2002-12-01), Miyamoto et al.
patent: 6654570 (2003-11-01), Kato
patent: 6731890 (2004-05-01), Rakov et al.
patent: 2002/0118977 (2002-08-01), Hasegawa et al.
patent: 2003/0118363 (2003-06-01), Izawa et al.
patent: 5-224541 (1993-09-01), None
patent: 8-194425 (1996-07-01), None
patent: 9-80871 (1997-03-01), None
Partial translation of JP 5-224541.

Affiliated with

Also associated with

Rating

Image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3507942