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:
May. 23, 2017
Filed:
Jun. 14, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Shizuma Nishimura, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A fixing apparatus for fixing a toner image on a recording material while conveying and heating, at a nip portion, the recoding material on which the toner image has been formed, the fixing apparatus including a rotary member including a conductive layer, a helical coil provided inside the rotary member, a helical axis of the helical coil extending in a generatrix direction of the rotary member, a magnetic core provided inside the helical coil, the magnetic core having a shape that does not form a loop outside the conductive layer, and a back-up member forming a nip portion together with the rotary member. In the generatrix direction, when winding pitches of the helical coil in a middle area, in end-portion areas, and in intermediate areas that are areas between the middle area and the end-portion areas are X, Y, and Z, respectively, then Y<X<Z is satisfied.