Reduced thickness fixing unit to reduce deformation or fatigue failure
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United States of America Patent
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Jan 14, 2014
Grant Date -
Jun 21, 2012
app pub date -
Sep 23, 2011
filing date -
Dec 17, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A fixing unit and an image forming apparatus including the fixing unit. The fixing unit includes a heating roller having an internal space in which a heating source is disposed and a pressurizing roller facing the heating roller. The heating roller has a circular hollow pipe shape and includes a fixing nip forming part which forms a fixing nip between the fixing nip forming part and the pressurizing roller. The nip forming part can have a slim part disposed at a center thereof and a pair of deformation preventing parts formed at both ends of the slim part, each deformation preventing part having a thickness thicker than a thickness of the slim part.
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