Induction fixing device with fixing sleeve provided with parallelism correction between fixing roller and pressure roller

摘要

A fixing device includes a fixing sleeve (1), a cylindrical fixing roller (2), and a pressure roller (3). The fixing sleeve (1) includes a heating layer that generates heat to fuse and fix toner. The fixing roller (2) has a surface covered with the fixing sleeve (1). The pressure roller (3) presses the fixing roller (2) via the fixing sleeve (1) to form a nip portion. The fixing sleeve (1) is freely rotatable with respect to the fixing roller (2), and is slid for rotation.
The sleeve (1) is provided with a ring (6) protruding from the sleeve towards the inner surface of the sleeve (1) where the sleeve is in sliding contact with the fixing roller (2).
The fixing roller (2) is provided with a ring member (5) adapted to avoid a shift of the sleeve (1) in the axial direction of the fixing roller (2) by abutting contact between said ring (6) and said ring member (5).