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. 15, 2011
Filed:
Feb. 23, 2009
Naoyuki Ishida, Osaka, JP;
Akihiro Kondo, Osaka, JP;
Yuzuru Nanjo, Osaka, JP;
Syoukou Gon, Osaka, JP;
Kenichi Kasama, Osaka, JP;
Eiji Nakajima, Osaka, JP;
Naoyuki Ishida, Osaka, JP;
Akihiro Kondo, Osaka, JP;
Yuzuru Nanjo, Osaka, JP;
Syoukou Gon, Osaka, JP;
Kenichi Kasama, Osaka, JP;
Eiji Nakajima, Osaka, JP;
Kyocera Mita Corporation, , JP;
Abstract
An image forming apparatus includes an image forming unit and a fixing unit. The fixing unit includes a heating member; a coil arranged along an outer surface of the heating member for generating a magnetic field for induction heating the heating member; a core arranged to face the heating member with the coil located therebetween in order to form a magnetic path around the coil and made of a magnetic material; a shielding member arranged near the magnetic path generated by the coil, including a closed frame portion and made of a nonmagnetic metal; and a magnetic shielding portion for displacing the shielding member between a retracted position for permitting a magnetic flux to pass along a frame surface virtually formed inside the closed frame portion and a shielding position for shielding magnetism by the penetration of a magnetic flux inside the frame surface.