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:
Dec. 13, 2011
Filed:
Nov. 26, 2008
Yuzuru Nanjo, Osaka, JP;
Eiji Nakajima, Osaka, JP;
Akihiro Kondo, Osaka, JP;
Naoyuki Ishida, Osaka, JP;
Syoukou Gon, Osaka, JP;
Kenichi Kasama, Osaka, JP;
Yuzuru Nanjo, Osaka, JP;
Eiji Nakajima, Osaka, JP;
Akihiro Kondo, Osaka, JP;
Naoyuki Ishida, Osaka, JP;
Syoukou Gon, Osaka, JP;
Kenichi Kasama, Osaka, JP;
Kyocera Mita Corporation, , JP;
Abstract
An image forming apparatus has an image forming station and a fixing unit. The fixing unit includes a coil for generating a magnetic field for induction heating the heating member. A first core made of a magnetic material is arranged fixedly around the coil. A second core made of a magnetic material is between the first core and the heating member in a generation direction of the magnetic field to form a magnetic path in cooperation with the first core and capable of changing a posture thereof. A shield made of a nonmagnetic metal is arranged along the outer surface of the second core to shield magnetism in the magnetic field and a magnetic shielding portion for changing the posture of the second core between a first posture where the shield shields the magnetism and a second posture where the shield does not shield the magnetism.