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:
Apr. 06, 2010
Filed:
Jan. 09, 2007
Yoshiaki Hiramoto, Yamatokoriyama, JP;
Seiichi Kizu, Ikoma, JP;
Masatsugu Hatanaka, Kashiwara, JP;
Motokazu Nakao, Sakurai, JP;
Yoshiaki Hiramoto, Yamatokoriyama, JP;
Seiichi Kizu, Ikoma, JP;
Masatsugu Hatanaka, Kashiwara, JP;
Motokazu Nakao, Sakurai, JP;
Sharp Kabushiki Kaisha, Osaka-Shi, JP;
Abstract
An image forming apparatus includes: a paper conveying portion for conveying a paper; an image forming portion for forming a visible toner image on the paper being conveyed, with a toner in accordance with input image information; and a fixing unit for fusing and fixing an unfixed toner image formed on the paper to the paper by using a heat roller and a pressing roller, and is constructed such that the pressing roller is composed of a metal core that forms a core shaft of the pressing roller and an elastic part that covers an outer periphery of the metal core, and a heat capacity at a center portion of the pressing roller with respect to a direction perpendicular to a paper's direction of conveyance is smaller than heat capacities at both ends of the pressing roller.