Image forming apparatus, process cartridge used therein, and...

Details Image forming apparatus, process cartridge used therein, and... Image forming apparatus, process cartridge used therein, and...

2011-01-11

2011-01-11

Walsh, Ryan D (Department: 2852)

Electrophotography

Image formation

Charging

C399S174000

Reexamination Certificate

active

07869743

ABSTRACT:
An image forming apparatus in which a charging roller charges an image carrier to which a lubricant is applied prevents slip of the charging roller. The charging roller is composed of a metal core and a rubber layer mainly made of an epichlorohydrin rubber formed around the metal core. A surface of this rubber layer is hardened with a surface treating solution containing an isocyanate compound. The surface of this rubber layer is also subjected to three abrading processes including two stone grinding processes and one lapping process so that a ten-point height of irregularities Rz thereof becomes 11 μm or more.

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