Developing roller having specific surface layer, developing...

Details Developing roller having specific surface layer, developing... Developing roller having specific surface layer, developing...

2007-07-05

2010-06-01

Chen, Sophia S (Department: 2852)

Electrophotography

Image formation

Development

C399S279000

Reexamination Certificate

active

07729648

ABSTRACT:
A developing roller has a surface layer composed of a binder resin having an SP value in the range of 7.5 to 9.0, and roughness-imparting particles made from a resin having an SP value that has a difference from the SP value of the resin of 2 or less in the absolute value thereof. The roughness-imparting particles are dispersed in the binder resin. A developing device is provided with the developing roller. An image-forming apparatus is provided with the developing device equipped with the developing roller.

REFERENCES:
patent: 5981129 (1999-11-01), Akazawa et al.
patent: 7224927 (2007-05-01), Sano et al.
patent: 05-072889 (1993-03-01), None
patent: 06-324514 (1994-11-01), None
patent: 08-076586 (1996-03-01), None
patent: 8-160738 (1996-06-01), None
patent: 10-90994 (1998-04-01), None
patent: 2003-005504 (2003-01-01), None
patent: 2006-58847 (2006-03-01), None
Machine translation of JP 06-324514 A dated Feb. 3, 2009.
Machine translation of JP 08-076586 A dated Feb. 3, 2009.
Machine translation of JP 10-090994 A dated Feb. 3, 2009.
Notification of Reasons for Refusal in corresponding Japanese Patent Application No. 2007-061273 with English Translation.

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