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:
Dec. 04, 2001
Filed:
Sep. 20, 2000
Applicant:
Inventor:
Toshiaki Higaya, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 1/520 ;
U.S. Cl.
CPC ...
G03G 1/520 ;
Abstract
The present invention provides a fixing device that excels in thermal conversion efficiency, compared with an induction-type fixing device. In this fixing device, a peripheral surface of a roller facing an induction coil has concavities and convexities with edges. Where the induction coil is inserted into a core bar, the concavities and convexities are formed inside the core bar. Where the induction coil is located outside the roller, the concavities and convexities are formed on the outer periphery of the core bar.