Fixing unit and heat roller for fixing unit

Details Fixing unit and heat roller for fixing unit Fixing unit and heat roller for fixing unit

1997-05-28

1998-10-20

Lee, Shuk

Electrophotography

Image formation

Fixing

219216, 219469, 399334, G03G 1520

Patent

active

058261524

ABSTRACT:
A fixing unit for an image forming device such as a laser printer includes a heat roller and a heating member driving unit to drive the heat roller. The heat roller includes a hollow cylindrical tube and a resistance heating member to selectively heat portions of the tube along the axial length thereof. The resistance heating member includes an insulating layer and a conductive layer. The conductive layer is provided with a plurality of resistance heating patterns arranged along the axial length of the tube and connected to a plurality of electrode portions. The connections between the resistance heating patterns and the electrode portions are arranged such that applying a voltage across selected electrode portions causes selected resistance patterns to generate heat and thus, selectively heat a portion of the tube along the axial length thereof.

REFERENCES:
patent: 3624353 (1971-11-01), Bjorklund et al.
patent: 4801968 (1989-01-01), Kogure et al.
patent: 4883941 (1989-11-01), Martin et al.
patent: 5575942 (1996-11-01), Watanabe
patent: 5666627 (1997-09-01), Yamaguchi

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