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. 06, 2009
Filed:
Aug. 31, 2007
Hajime Kaji, Abiko, JP;
Toshifumi Kakutani, Toride, JP;
Satoru Ishikawa, Ryugasaki, JP;
Kazunori Miyake, Toride, JP;
Satoru Kanno, Kashiwa, JP;
Hajime Kaji, Abiko, JP;
Toshifumi Kakutani, Toride, JP;
Satoru Ishikawa, Ryugasaki, JP;
Kazunori Miyake, Toride, JP;
Satoru Kanno, Kashiwa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A fixing apparatus has first and second heating members and a current control unit which controls a number of waves and each of a first AC current to the first heating member and a second AC current to the second heating member in a positive-negative symmetrical pattern by a unit of predetermined number of half-waves. Regardless of a duty ratio of the first heating member and the second heating member, when the current control unit controls a number of waves so that the second AC current is larger than the first AC current in the first duty ratio, the current control unit controls the number of waves so that the first AC current is larger than the second AC current in a second duty ratio adjacent to the first duty ratio.