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. 03, 2009
Filed:
Jul. 26, 2005
Masaru Imai, Osaka, JP;
Noboru Katakabe, Kyoto, JP;
Youichi Nakamura, Fukuoka, JP;
Naoto Matsuo, Fukuoka, JP;
Tomoyuki Noguchi, Fukuoka, JP;
Masaru Imai, Osaka, JP;
Noboru Katakabe, Kyoto, JP;
Youichi Nakamura, Fukuoka, JP;
Naoto Matsuo, Fukuoka, JP;
Tomoyuki Noguchi, Fukuoka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A heat generating roller, fixing equipment and an image forming apparatus in which warm-up time is shortened while preventing excessive temperature rise and good fixing performance is realized by preventing offset. The heat generating roller is formed principally by laying a high permeability conductive layer and a nonmagnetic conductive layer in layer. When a voltage is applied from a power supply to an exciting coil and an alternating current flow, magnetic flux is generated around the exciting coil and a magnetic field is formed. Magnetic coupling of a system including the heat generating roller and the exciting coil is advantageous at a low temperature and heat generation of the heat generating roller is accelerated. When the Curie point is exceeded, skin depth increases and skin resistance decreases, which suppresses generation of Joules heat and reduces heat generation of the heat generating roller.