The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2011
Filed:
Apr. 24, 2007
Toshiaki Kagawa, Kitakatsuragi-gun, JP;
Kouji Shinkawa, Kitakatsuragi-gun, JP;
Tohru Sakuwa, Nara, JP;
Toshiaki Kagawa, Kitakatsuragi-gun, JP;
Kouji Shinkawa, Kitakatsuragi-gun, JP;
Tohru Sakuwa, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
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.