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:
Sep. 25, 2018
Filed:
Apr. 27, 2017
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Noriaki Sato, Mishima, JP;
Tetsuichiro Fujimoto, Mishima, JP;
Hiromitsu Kumada, Suntou-gun, JP;
Tsuyoshi Ogawa, Tokyo, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/16 (2006.01); G03G 15/00 (2006.01);
U.S. Cl.
CPC ...
G03G 15/1665 (2013.01); G03G 15/1695 (2013.01); G03G 15/6558 (2013.01);
Abstract
An image forming apparatus includes an image forming unit, a transfer portion that transfers a toner image to a transfer material, a first roller disposed upstream of the transfer portion in a conveying direction of the transfer material, and a second roller disposed upstream of the transfer portion and downstream of the first roller. The triboelectric charge polarities of the surfaces of the first and second rollers when the surfaces are triboelectrically charged by contact with the transfer material differ from each other.