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:
Jun. 21, 2005
Filed:
Aug. 27, 2003
Masahiko Takashima, Minokamo, JP;
Nobuya Yoshida, Komaki, JP;
Satoshi Tatsumi, Kasugai, JP;
Tetsuya Itoh, Komaki, JP;
Kenichi Tsuchiya, Komaki, JP;
Jiro Iwashiro, Kasugai, JP;
Masahiko Takashima, Minokamo, JP;
Nobuya Yoshida, Komaki, JP;
Satoshi Tatsumi, Kasugai, JP;
Tetsuya Itoh, Komaki, JP;
Kenichi Tsuchiya, Komaki, JP;
Jiro Iwashiro, Kasugai, JP;
Tokai Rubber Industries, Ltd., Komaki, JP;
Abstract
An electrically conductive roll includes a center shaft, an electrically conductive elastic layer formed on an outer circumferential surface of the center shaft, and a resistance adjusting layer formed radially outwardly of the electrically conductive elastic layer. The resistance adjusting layer is formed of a rubber composition which includes a rubber material, a thermoplastic resin having crosslinkable double bonds, at least one electron-conductive agent, at least one ion-conductive agent, and at least one electrically insulating filler. The thermoplastic resin, the at least one electron-conductive agent, the at least one ion-conductive agent, and the at least one electrically insulating filler are included in the rubber composition in respective amounts of 3-40 parts by weight, 10-150 parts by weight, not greater than 2 parts by weight, and 20-80 parts by weight, per 100 parts by weight of the rubber material.