Fixing unit and image forming apparatus having the same

Details Fixing unit and image forming apparatus having the same Fixing unit and image forming apparatus having the same

2007-09-13

2010-02-02

Chen, Sophia S (Department: 2852)

Electrophotography

Image formation

Fixing

C399S329000

Reexamination Certificate

active

07657216

ABSTRACT:
A fixing unit which enables high-speed operation and miniaturization, and an image forming apparatus having the fixing unit, includes a heating member which is heated by a heat source, the heating member having a predetermined width; a rotating member to rotate in contact with the heating member; a driving member to rotate the rotating member; and a pressing member to press both sides of the heating member towards the driving member and to form a predetermined fixing nip between the rotating member and the driving member, wherein the heating member has a second moment of inertia which is set to maintain a fixing efficiency of 90% or more in a central portion of the heating member.

REFERENCES:
patent: 6049691 (2000-04-01), Abe et al.
patent: 2005/0185996 (2005-08-01), Oishi et al.
patent: 2006/0153605 (2006-07-01), Nishiyama et al.
patent: 2008/0050155 (2008-02-01), Miki et al.
patent: 2008/0063442 (2008-03-01), Yagi et al.

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