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:
Jan. 25, 2005
Filed:
Jan. 23, 2002
Ichiro Yokozeki, Kanagawa-ken, JP;
Teiji Shimokawa, Kanagawa-ken, JP;
Masaaki Kawamura, Kanagawa-ken, JP;
Ichiro Yokozeki, Kanagawa-ken, JP;
Teiji Shimokawa, Kanagawa-ken, JP;
Masaaki Kawamura, Kanagawa-ken, JP;
Harison Toshiba Lighting Corporation, Imabari, JP;
Abstract
An induction heating roller, a fixing apparatus and an image forming apparatus are disclosed as including a heating roller (TR) comprised of a hollow roller base body (BB), composed of electrically insulating material, and a plurality of secondary coil components (ws), composed of closed circuits, respectively, which are formed over the roller base body. The heating roller (TR) internally receives an induction coil unit (IC) including a primary coil (wp) which is coupled with the secondary coils in a core-less transformer coupling relationship. The secondary coil components (ws) of the heating roller (TR) have a secondary resistance value (R) which is nearly equal to a secondary reactance (X), i.e. in case of R/X=α, a formula is expressed as 0.1<α<10. Further, the primary coil (wp) of the induction coil unit (IC) is comprised of a plurality of coil components which are connected between a wire pair (WP) in parallel to one another.