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. 22, 2008
Filed:
Sep. 01, 2005
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 a first heating member and a second heating member provided in a heating portion, and a current control unit which controls an AC current to be supplied to the heating portion, The current control unit executes a wave number control, on the AC current supplied to the heating portion, in a unit of predetermined number of half-waves so that an AC current to the first heating member is supplied in a positive-negative symmetrical pattern in the unit of predetermined number of half-waves; an AC current to the second heating member is supplied in a positive-negative symmetrical pattern in the unit of predetermined number of half waves; AC currents to the first and second heating members are supplied in a positive-negative symmetrical pattern in total in the unit of predetermined number of half-waves and the current control unit increases the duty ratio alternately for the first heating member and the second heating member.