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:
Jan. 11, 2011
Filed:
Jul. 13, 2005
Shogo Yokota, Osaka, JP;
Tomohiro Maeda, Osaka, JP;
Toshiaki Kagawa, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In an external heating type induction heating device in which a magnetic field producing means is arranged in the outer circumferential portion of a heating roller, two heat generating layers, namely a conductive shaftand a surface heat generating layer, are provided in the heating roller, and the surface heat generating layeris formed having a thickness through which passes a portion of an alternating magnetic field, and the conductive shaftat a center of the heating rolleris heated by a portion of the alternating magnetic field produced by the magnetic field producing means passing through the surface heat generating layerto link to the conductive shaftpresent at the center of the roller, thereby preventing a drop in a surface temperature of the heating roller