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:
Apr. 10, 2007
Filed:
Jan. 21, 2005
Masahito Omata, Mishima, JP;
Hisashi Nakahara, Numazu, JP;
Yusuke Nakazono, Mishima, JP;
Satoshi Nishida, Numazu, JP;
Eiji Uekawa, Mishima, JP;
Isamu Takeda, Numazu, JP;
Noriyuki Ito, Mishima, JP;
Masahito Omata, Mishima, JP;
Hisashi Nakahara, Numazu, JP;
Yusuke Nakazono, Mishima, JP;
Satoshi Nishida, Numazu, JP;
Eiji Uekawa, Mishima, JP;
Isamu Takeda, Numazu, JP;
Noriyuki Ito, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Image heating apparatus capable of preventing an excessive temperature increase in a sheet non-passing area and heater for use in the image heating apparatus including: a substrate, a heat generating resistor formed on the substrate, and first and second electrodes for supplying an electric power to the heat generating resistor. Each of the first and second electrodes has a first area to contact a power supplying connector and a second area provided at an end portion electrically opposite to the first area along a longitudinal direction of the substrate, and the heat generating resistor is provided to electrically connect the second area of the first and second electrode so that when the heater is at a set temperature for an image heating operation a resistance value Rc of the second area, and a resistance value Rt between a portion within the second area of the first and second electrode and electrically closest to the first area satisfy a relation Rc/Rt<=1/30.