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:
Jun. 12, 1990
Filed:
Apr. 24, 1989
Applicant:
Inventors:
Yuji Sugimoto, Nara, JP;
Masaru Tsuji, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355289 ; 355285 ; 355290 ; 219216 ;
Abstract
A fixing device for electrophotography has a heating roller and a compression roller compressed against each other. Copy paper with toner image on its surface is passed inbetween to have the image fixed. The heating roller is hollow and contains a heater inside. To control the heat output of the heater, a temperature detector is positioned on the surface of the heating roller near the edge of the paper passing between the rollers where no toner image is formed. The wall thickness of the heating roller is reduced to about 0.8-1.5 mm for improved heat distribution characteristics.