Image heating apparatus including an endless belt and belt...

Details Image heating apparatus including an endless belt and belt... Image heating apparatus including an endless belt and belt...

2007-12-11

2007-12-11

Grainger, Quana (Department: 2852)

Electrophotography

Internal machine environment

Forced air circulation

C399S329000

Reexamination Certificate

active

11249457

ABSTRACT:
The invention aims to prevent an image deterioration resulting from a fixing belt rising in temperature too much, and prevent heat of the fixing belt from being transmitted to peripheral members around a fixing apparatus such as a photosensitive drum so as not to adversely effect the peripheral members. A fixing apparatus5has a fixing roller510and a fixing belt531that heat-fix an image on to a recording material P by a fixing nip W, partition walls601to605that surround the fixing belt531to thereby suppress the air naturally entering into around the fixing belt531, and a cooling unit that cools the fixing belt531in a closed space600formed by the partition walls601to605. The cooling unit has a supply duct612through which a supply fan613supplies air to the closed space600from below, a cooling fan611that blows the air supplied from the supply duct612toward the fixing belt531, and a discharge duct614through which a discharge fan615discharges the air from an upper portion of the closed space600.

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patent: 2002-365946 (2002-12-01), None
patent: 2004151476 (2004-05-01), None

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