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:
Jul. 20, 1999
Filed:
Sep. 24, 1997
Yukihiro Ishii, Kanagawa, JP;
Michiaki Yasuno, Kanagawa, JP;
Minoru Rokutan, Kanagawa, JP;
Mitsuo Fukuda, Kanagawa, JP;
Jun Mihara, Kanagawa, JP;
Yuzo Ozaki, Kanagawa, JP;
Masato Takinami, Kanagawa, JP;
Takeo Fusayama, Kanagawa, JP;
Fuji Xerox Co., Ltd., Toyko, JP;
Abstract
Semiconductive members such as charging members, copying members, pressure fixation rolls, electricity removing members and the like having a small environmental dependence are provided. The semiconductive member of the present invention contains a semiconductive substrate, a conductive rubber layer, an intermediate layer, a resistance control layer the constituent material of which is a polyurethane ionomer having an ionic segment in the molecule, and a surface layer. The ionic segment is selected from among a sulfonic acid group, a carboxyl group and a tertiary amino radical, or the salts thereof. In addition, the glass transition temperature of this polyurethane ionomer is 30.degree. C. or less, and the volume specific resistance value is in the range of 10.sup.6 to 10.sup.9 W cm.