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:
Apr. 03, 2012
Filed:
Apr. 20, 2009
Makoto Nakamura, Ebina, JP;
Yutaka Narita, Sagamihara, JP;
Tadayuki Oshima, Atsugi, JP;
Taisuke Tokuwaki, Sagamihara, JP;
Hiroki Furubayashi, Atsugi, JP;
Makoto Nakamura, Ebina, JP;
Yutaka Narita, Sagamihara, JP;
Tadayuki Oshima, Atsugi, JP;
Taisuke Tokuwaki, Sagamihara, JP;
Hiroki Furubayashi, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A charging member is provided in which a minute gap between an image support body and the charging member is set widely but even so the charging member does not abnormally discharge easily, the charging member includes a conductive support body, an electrical resistance adjustment layerdisposed on the conductive support bodyand a surface layerdisposed on the electrical resistance adjustment layerin which the surface layer contains at least (a) polyol resin grafted with fluorine or silicon, (b) polyether polyol resin, (c) organic anion salt that contains fluorine and alkali metal or alkali earth metal and (d) polyisocyanate.