Image forming device, charging device and cleaning device

Details Image forming device, charging device and cleaning device Image forming device, charging device and cleaning device

2006-08-17

2008-11-18

Brase, Sandra L (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S176000

Reexamination Certificate

active

07454154

ABSTRACT:
An image forming device has a charging roller including a shaft which is rotatably supported and a cleaning roller that abuts the charging roller. The cleaning roller includes a shaft that is rotatably supported and a porous elastic layer being provided around the shaft. The image forming device satisfies the relation T×α/100>(R1+R2)−L>B>0, where L [mm] is a separation distance of axial centers of both end portions of the shaft of the cleaning roller and the shaft of the charging roller, R1 [mm] is a radius of the charging roller, T [mm] is a thickness of the porous elastic layer, R2 [mm] is a radius of the cleaning roller, B [mm] is a flexure amount of an axial direction central portion of the shaft of the cleaning roller, and α [%] is a maximum allowable compression rate in accordance with a stress-flexure curve.

REFERENCES:
patent: 5978616 (1999-11-01), Shin
patent: 6751427 (2004-06-01), Sugiura
patent: 6873809 (2005-03-01), Amemiya et al.
patent: 7062194 (2006-06-01), Yanagida et al.
patent: 7139504 (2006-11-01), Yanagida et al.

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