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. 30, 1996
Filed:
Jun. 10, 1994
Masaaki Ishikawa, Tokyo, JP;
Michihisa Iguchi, Tokyo, JP;
Hiroshi Hashizume, Tokyo, JP;
Tetsuya Nakamura, Tokyo, JP;
Kouichirou Satou, Tokyo, JP;
Yoshiaki Okano, Tokyo, JP;
Hirotaka Fukuyama, Tokyo, JP;
Satoshi Katagata, Tokyo, JP;
Takashi Ishikawa, Tokyo, JP;
Seiji Arai, Tokyo, JP;
Chinobu Sakai, Tokyo, JP;
Takahito Kabai, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A developing device used in an electrophotographic apparatus has seal members fixedly disposed between both end portions of a developing roller and those portions of inner walls of a device casing which correspond to both end portions of the developing roller. The seal members are made of a material which can be charged by friction with the developing roller to have the same polarity as charged toner. The toner is blocked by the seal members and prevented from entering end portions of the developing roller.