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. 25, 1997
Filed:
Sep. 29, 1995
Hidetoshi Yano, Yokohama, JP;
Hisashi Shoji, Kawasaki, JP;
Tsukuru Kai, Fujisawa, JP;
Osamu Endo, Kawasaki, JP;
Yoshiko Ishii, Tsukuba, JP;
Nobuto Yokokawa, Gotenba, JP;
Masako Suzuki, Yokohama, JP;
Yukiko Iwasaki, Tokyo, JP;
Koji Sakamoto, Tokyo, JP;
Yasushi Nakazato, Tokyo, JP;
Takayuki Kimura, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
In an image forming apparatus, during the course of recording, a cleaning roller is rotated together with an image carrier. The roller frictionally charges toner left on the image carrier after image transfer to the same polarity. A cleaning member electrostatically collects the charged toner. At the same time, a voltage is applied to the cleaning member by a voltage applying device in order to cause it to attract the charged toner, thereby cleaning the image carrier. Hence, even when the toner remaining on image carrier is charged partly to the positive polarity and partly to the negative polarity, the toner can be entirely transferred to the cleaning member by a simple construction.