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:
Feb. 04, 1997
Filed:
Jun. 09, 1994
Takao Umeda, Mito, JP;
Katsuya Kawai, Katsuta, JP;
Yosuke Saito, Katsuta, JP;
Hiroyuki Mabuchi, Katsuta, JP;
Masayasu Anzai, Hitachi, JP;
Masato Miwa, Katsuta, JP;
Takashi Suzuki, Katsuta, JP;
Teruaki Mitsuya, Pasadena, CA (US);
Yasuo Takuma, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A bias cleaning system has an electrically conductive brush roller for collecting toner which has to adhered a transfer belt by scrubbing the toner off the transfer belt under a condition in which a direct current voltage of the opposite polarity to the charge of the toner is applied to the brush roller. A corona charger is also provided for decreasing the amount of charge on the toner on the transfer belt in a region of the belt up-stream of the electrically conductive brush roller in the moving direction of the transfer belt.