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:
Sep. 28, 2004
Filed:
Oct. 18, 2002
Takashi Birumachi, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides a fixing apparatus including a coil for generating a magnetic field; a heating medium having an electroconductive layer which generates heat by an eddy current by the magnetic field generated by the coil, and adapted to fix an unfixed toner image borne on a recording material by heat; a temperature detecting member for detecting the temperature of the heating medium; a semiconductor switch element for executing an on-off current supply to the coil; and a capacitor connected electrically parallel to the coil; wherein the capacitor executes charging and discharging, and an on-period from the semiconductor switch element to the coil is controlled according to the output of the temperature detecting member.