Image forming device using a single-layer-type...

Details Image forming device using a single-layer-type... Image forming device using a single-layer-type...

2006-08-14

2009-06-30

Royer, William J (Department: 2852)

Electrophotography

Supplemental electrophotographic process

Exposure or charging

C399S159000

Reexamination Certificate

active

07555241

ABSTRACT:
An image forming apparatus which can exhibit an excellent charge eliminating effect by erasing a transfer memory using a precharging device with optimized conditions even when a positively-charged single-layer-type electrophotographic photoconductor is used as a photoconductor. In the image forming apparatus which sequentially arranges a charging device, a developing device, a transfer device, and a charge eliminating device around a single-layer-type electrophotographic photoconductor, the charging device charges a surface of the single-layer-type electrophotographic photoconductor with a positive polarity, a precharging device having a conductive member is arranged on an upstream side of the charge eliminating device, the conductive member is brought into contact with the electrophotographic photoconductor, and a current density Ib(μA/m2) of the injected current into the photoconductor from the conductive member is set to a value of 700 (μA/m2) or more.

REFERENCES:
patent: 4757345 (1988-07-01), Ohashi et al.
patent: 5729799 (1998-03-01), Numao et al.
patent: 7395011 (2008-07-01), Tanaka
patent: 06-83249 (1994-03-01), None
patent: 10-115967 (1998-05-01), None

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