Image forming apparatus having a photoconductive drum

Details Image forming apparatus having a photoconductive drum Image forming apparatus having a photoconductive drum

2011-07-12

2011-07-12

Tran, Hoan (Department: 2884)

Electrophotography

Image formation

Development

C399S055000

Reexamination Certificate

active

07979011

ABSTRACT:
An image forming apparatus that includes: a photoconductive drum; a developing roller that is arranged opposite the photoconductive drum and that carries toner; a detecting portion that detects an occurrence of electrical discharge between the developing roller and the photoconductive drum; a control portion that controls the apparatus, that receives an output of the detecting portion and then recognizes the occurrence of the electrical discharge; a direct voltage applying portion that is connected to the developing roller; and an alternating voltage applying portion is disclosed herein.

REFERENCES:
patent: 5202731 (1993-04-01), Tanikawa et al.
patent: 6782226 (2004-08-01), Machida et al.
patent: 6917780 (2005-07-01), Ozawa et al.
patent: 7761040 (2010-07-01), Uetake et al.
patent: 3815356 (2006-06-01), None

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