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:
Oct. 03, 2005
Filed:
Jan. 31, 2002
Hiroshi Terada, Ikoma, JP;
Akinori Toyoda, Katano, JP;
Yoshihito Urata, Kantano, JP;
Hajime Yamamoto, Ikoma, JP;
Nobuo Genji, Osakasayama, JP;
Naoaki Ishimaru, Minoo, JP;
Tatsuo Nakatsugawa, Utsunomiya, JP;
Masakazu Naito, Shioya, JP;
Hiroshi Terada, Ikoma, JP;
Akinori Toyoda, Katano, JP;
Yoshihito Urata, Kantano, JP;
Hajime Yamamoto, Ikoma, JP;
Nobuo Genji, Osakasayama, JP;
Naoaki Ishimaru, Minoo, JP;
Tatsuo Nakatsugawa, Utsunomiya, JP;
Masakazu Naito, Shioya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Panasonic Communications Co., Ltd., Fukuoka, JP;
Abstract
An image heating device comprises a cylindrical heating roller with a Curie temperature of 210° C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carriers a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than ½. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.