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:
May. 31, 2005
Filed:
Jul. 10, 2003
Tadafumi Shimizu, Ogori, JP;
Shouichi Kitagawa, Fukuoka, JP;
Masahiro Samei, Fukuoka, JP;
Kazunori Matsuo, Oonojo, JP;
Keiichi Matsuzaki, Kurume, JP;
Kenji Asakura, Kyoto, JP;
Hideki Tatematsu, Ashiya, JP;
Tadafumi Shimizu, Ogori, JP;
Shouichi Kitagawa, Fukuoka, JP;
Masahiro Samei, Fukuoka, JP;
Kazunori Matsuo, Oonojo, JP;
Keiichi Matsuzaki, Kurume, JP;
Kenji Asakura, Kyoto, JP;
Hideki Tatematsu, Ashiya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A fixing device is formed by using a heat generating roller having magnetism and electric conductive characteristics and a magnetizing coil opposed to the outer peripheral of the heat generating roller and generating heat on the heat generating roller by an electromagnetic induction. The magnetizing coil is formed in such a manner that 60 copper wires whose surfaces are insulated and have the outside diameter of 0.2 mm are bundled to form a bundle of wires and the bundle of wires is drawn in the direction of rotation axis of the heat generating roller and wound in the direction of a circumference of the heat generating roller. Further, the magnetizing coil is disposed so that the bundles of wires mutually come into close contact along the circumference of the heat generating roller to cover the upper half of the heat generating roller.