Patent Number: 6,169,871

Title: Fixing apparatus with improved fixing efficiency

Abstract: An induction heating fixing apparatus including a heating roller having an outer cylinder, a coil arranged inside the outer cylinder to generate an induction magnetic flux, and a first insulating cylinder member arranged between the outer cylinder and the coil. A second insulating cylinder member is provided coaxial arrangement with the first insulating cylinder member and includes a spiral rib in substantially tight contact with the first insulating cylinder member to remove heat from the inside of the heating roller during rotation of the second insulating cylinder member. The coil is wound on a tubular member having an outer circumferential surface provided with radial holes which communicate with the interior of the tubular member and thereby to outside of the heating roller also to remove heat from the heating roller.

Inventors: Higaya; Toshiaki (Kawasaki, JP)

Assignee: Ricoh Company, Ltd.

International Classification: G03G 15/20 (20060101); H05B 6/14 (20060101); G03G 015/20 ()

Expiration Date: 01/02/2018