Title:
DEVELOPING ROLLER, PROCESS FOR PRODUCING SAME, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE-FORMING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2010/058699
Kind Code:
A1
Abstract:
A developing roller which can be inhibited from causing toner dusting during development and can give electrophotographic images of an even higher grade. The developing roller comprises a core shaft, an elastic layer disposed on the periphery of the core shaft, and a surface layer disposed on the periphery of the elastic layer. The surface layer comprises a urethane resin as a binder and urethane resin particles dispersed in the binder, the particles being for forming protrusions on the surface of the surface layer. The surfaces of the urethane resin particles have been partially covered with fine inorganic particles containing at least one element selected from silicon, titanium, and aluminum. Those surfaces of the urethane resin particles to which the fine inorganic particles are not adherent are in direct contact with the binder.
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Inventors:
NAKAMURA MINORU (JP)
NAGAOKA KAZUAKI (JP)
TAKAYAMA YOSHIYUKI (JP)
NAGAOKA KAZUAKI (JP)
TAKAYAMA YOSHIYUKI (JP)
Application Number:
PCT/JP2009/068862
Publication Date:
May 27, 2010
Filing Date:
October 28, 2009
Export Citation:
Assignee:
CANON KK (JP)
NAKAMURA MINORU (JP)
NAGAOKA KAZUAKI (JP)
TAKAYAMA YOSHIYUKI (JP)
NAKAMURA MINORU (JP)
NAGAOKA KAZUAKI (JP)
TAKAYAMA YOSHIYUKI (JP)
International Classes:
G03G15/08; F16C13/00
Foreign References:
| JP2008112150A | 2008-05-15 | |||
| JP2005283912A | 2005-10-13 | |||
| JP2005258201A | 2005-09-22 | |||
| JPH1090996A | 1998-04-10 | |||
| JPH09185246A | 1997-07-15 | |||
| JPH08185042A | 1996-07-16 | |||
| JP2008112150A | 2008-05-15 | |||
| US20080193172A1 | 2008-08-14 | |||
| JP2008294293A | 2008-12-04 |
Other References:
See also references of EP 2348367A4
Attorney, Agent or Firm:
OKABE, Masao et al. (JP)
Masao Okabe (JP)
Masao Okabe (JP)
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