Image heating apparatus

Details Image heating apparatus Image heating apparatus

2006-09-06

2008-10-07

Gray, David M. (Department: 2852)

Electrophotography

Internal machine environment

Forced air circulation

C399S043000

Reexamination Certificate

active

07433625

ABSTRACT:
An image heating apparatus including an image heater for heating an image on a recording material in a nip portion, an air blower for blowing air toward an air blowing port to cool a predetermined area of the image heater, and a shutter for opening an closing the air blowing port, wherein when recording materials change in width in the course of continuously executing an image heating process accompanied by a cooling operation, the shutter is kept opened until the number of recording materials after the change reaches a predetermined number, whereby the frequency of the driving of the shutter for the air blowing port when small size recording materials and large size recording materials are mixed-loaded and passed is reduced to thereby achieve the longer life of a shutter driving portion, the electric power saving of the apparatus and a reduction in opening-closing noise.

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