Electrophotography – Image formation – Development
Reexamination Certificate
2011-02-01
2011-02-01
Porta, David P (Department: 2884)
Electrophotography
Image formation
Development
C399S265000, C399S286000, C492S028000, C492S048000, C492S053000, C492S056000
Reexamination Certificate
active
07881646
ABSTRACT:
A developing roller suppresses scattering of toner during a developing process and provides a further higher-quality electrophotographic image. The developing roller has a mandrel, an elastic layer provided on the circumference of the mandrel, and a surface layer provided on the circumference of the elastic layer. The surface layer contains a urethane resin serving as a binder and urethane resin particles dispersed in the binder, for forming convex portions on the surface of the surface layer. The surface of the urethane resin particles is partly covered with fine inorganic particles containing at least one element selected from silicon, titanium and aluminum and the urethane resin particles are in direct contact with the binder at the surface onto which the fine inorganic particles are not attached.
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Nagaoka Kazuaki
Nakamura Minoru
Takayama Yoshiyuki
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Porta David P
Vu Mindy
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