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:
Oct. 06, 2020
Filed:
Mar. 08, 2020
Sumitomo Riko Company Limited, Aichi, JP;
Shinkichi Kashihara, Aichi, JP;
Takeru Horiuchi, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
A charging member for an electrophotographic apparatus in which image defects caused by bleeding of an ion-conductive agent are suppressed and excellent chargeability can be maintained. In a charging member for an electrophotographic apparatus including a base layer composed of a conductive rubber elastomer and a surface layer, the base layer is a cross-linked body of a conductive rubber composition containing (a) a cross-linkable rubber, (b) a cross-linking agent, (c) an ion-conductive agent represented by a general formula (1) below, and (d) carbon black. Here, Rand Rare allyl groups, Ris a methyl group or an ethyl group, and Ris a linear alkyl group having a carbon number of 6-8. Xis a sulfonate anion having a fluorine atom or a bis(sulfonyl) imide anion having a fluorine atom.