FIXING DEVICE

Japanese Patent JP3905514

B2

PROBLEM TO BE SOLVED: To provide a fixing device by which an unfixed toner can steadily be fixed by restraining thermal expansion of a drive member and smoothly rotating a heat roller and pressure roller without causing fluctuations in the peripheral speeds of the rollers.
SOLUTION: The heat roller or pressure roller is constructed as a drive roller 51 that is rotated by driving force from a drive motor. The drive roller has a cylindrical form, and the drive member 52 for transmitting the drive force from the drive motor to the drive roller has an almost conical form. The drive member is engaged with the drive roller so as to move axially forward or backward while the leading end of the drive member, whose peripheral wall cross-sectional area is smaller, is fitted to the inside from the axial end face of the drive roller. A helical gear 52b for transmitting the drive force from the drive motor is integrally disposed at the proximal end of the drive member, whose cross-sectional area is larger.

JP2008268758	IMAGE FORMING APPARATUS
JP2005181627	FIXING APPARATUS, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE
JP2000280339	MANUFACTURE OF TUBULAR BODY, TUBULAR BODY, MANUFACTURE OF METAL TUBE, METAL TUBE AND FIXING FILM AND TRANSFER BELT OF IMAGE FORMING APPARATUS

Katsura Norifumi
Tomohiro Yamashita
Koji Aoki
Yoshiyuki Nagai
Okumura Yoshinobu
Kenji Kitami

JP2003427884A

April 18, 2007

December 24, 2003

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Sharp Corporation

G03G15/20; F16H1/08; (IPC1-7): G03G15/20; F16H1/08

JP11007173A
JP8177988A
JP2001142335A

Yoshiro Kurauchi

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