Developing roller specific for mono-component developing...

Details Developing roller specific for mono-component developing... Developing roller specific for mono-component developing...

2008-05-05

2011-12-27

Gray, David (Department: 2852)

Electrophotography

Image formation

Development

C399S103000, C399S105000, C399S286000

Reexamination Certificate

active

08086151

ABSTRACT:
A mono-component developing apparatus including a developing roller which transports toner supported on an outer circumferential face of a center portion toward a developing area by rotating while frictionally sliding on a sealing member on each of two end portions. The developing roller includes surface processing areas having a spiral shape, placed on each of outer circumferential faces of the two end portions. An angle, made by a spiral direction of each surface processing area and the rotation direction, is an acute angle. The developing roller inhibits toner leakage, with the driving torque of the developing roller being only slightly increased.

REFERENCES:
patent: 04-104277 (1992-04-01), None
patent: 2000242073 (2000-09-01), None
patent: 2003-186299 (A) (2003-07-01), None
patent: 2008-189749 (2005-07-01), None
The First Office Action issued in corresponding Chinese Application No. 2008101114112 dated Oct. 16, 2009, and an English Translation thereof.
Notification of Reasons for Refusal in JP 2007-155025 dated Apr. 21, 2009, and an English Translation thereof.
Notification of Reasons for Refusal with English Translation, Japanese Patent Application No. 2007-155025, dated Jul. 14, 2009.

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