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:
Aug. 01, 2000
Filed:
Feb. 27, 1998
Katsuya Toyota, Kagoshima, JP;
Takahiro Maruyama, Shiga, JP;
Shinsuke Takenishi, Shiga, JP;
Kyoji Uchiyama, Shiga, JP;
Shigenobu Nakamura, Kagoshima, JP;
Kouihi Hayashi, Shiga, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
In a heating roller for fixing which is constituted such that a heating resistor 3 is provided onto an inner circumferential surface 1a of a cylinder 1 with an insulating layer 2 lying therebetween and a cleavage layer 6 is provided onto an outer circumferential surface, electrical insulating properties of the insulating layer 2 are maintained satisfactorily for a long time. A maximum height (Rmax) of surface roughness of the inner circumferential surface 1a of the cylinder 1 is in the range of 0.8 to 50 .mu.m. A resistance value in the heating roller for fixing is partially adjusted easily. In a heating roller for fixing having a heater resistor 103 on a surface of a cylinder 101 with an insulating layer 102 lying therebetween, the heating resistor 103 is divided into a plurality of zones in an axial direction of the cylinder 101, and slots for adjusting resistance are formed in each zone. In a heating roller for fixing, a generated heat is prevented from dispersing, uniform heating can be performed, heat loss is reduced, and thus power is tried to be saved. A heating resistor 203 is provided to an inner surface of a cylinder 201, and an electrode member 205 connected to the heating resistor 203 is provided to both ends of the cylinder 201 on the inner side, and the electrode member 205 stops up the cylinder 201.