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:
Oct. 21, 1986
Filed:
Mar. 14, 1983
Masaaki Sakurai, Hanno, JP;
Kazuo Kagiura, Iokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A heating device having a heating roller for heat-treating an object to be heated or for heat-treating an object to be heated on a support member comprises a heat loss preventing device for preventing heat loss at the end portions of the roller, and a heating device provided internally or externally of the roller to efficiently heat the heating roller and secure a uniform heat distribution on the surface of the roller during heat treatment. The heat loss preventing device has a gear having heat-resistant insulating material and/or an insulating bearing or an insulating sleeve provided between a bearing and the roller, and the heating device has a heating member whose heating distribution is greater in the central portion than in the end portions of the roller or a heating member having a heating distribution area smaller than the maximum width of the support member and in addition, a heating member whose heating distribution is substantially constant or whose heating distribution is greater in the central portion than in the end portions of the roller.