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:
Feb. 11, 2003
Filed:
Jul. 06, 2001
Yasumasa Otsuka, Kanagawa, JP;
Takashi Soya, Chiba, JP;
Ken Murooka, Ibaraki, JP;
Masahide Hirai, Ibaraki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This specification discloses a heater comprising an electrically conductive substrate, a first electrically insulating layer formed on the electrically conductive substrate, a heat generating resistor formed on the first electrically insulating layer, and a second electrically insulating layer formed on the heat generating resistor, wherein when the glass transition temperature of the first electrically insulating layer is defined as T and the glass transition temperature of the heat generating resistor is defined as T and the glass transition temperature of the second electrically insulating layer is defined as T , T , T and T have the relation that T >T ≧T or T >T ≧T . The specification also discloses an image heating apparatus using such heater.