Developing apparatus

Details Developing apparatus Developing apparatus

2005-10-05

2008-03-18

Tran, Hoan (Department: 2852)

Electrophotography

Image formation

Development

C399S284000, C399S286000

Reexamination Certificate

active

07346300

ABSTRACT:
A developing apparatus having a developer carrying member carrying developer including toner, a developer regulating member regulating the layer thickness of the developer carried on the developer carrying member, and a lubricant provided in a contact portion between the carrying member and the regulating member with the developer being not present on the carrying member, wherein the lubricant includes a first polymer particle which is of a spherical shape having an average degree of circularity of 0.90 or greater and is of a polarity opposite to the charging polarity of the toner, and a second polymer particle of a scalelike shape and of the same polarity as the charging polarity of the toner.

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patent: 5721433 (1998-02-01), Kosaka
patent: 7209699 (2007-04-01), Yamaguchi et al.
patent: 2004/0223789 (2004-11-01), Inami et al.
patent: 3-191370 (1991-08-01), None
patent: 8-136439 (1996-05-01), None
patent: 8-211728 (1996-08-01), None
patent: 11-119551 (1999-04-01), None
patent: 2002-278262 (2002-09-01), None

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