Electrophotography – Internal machine environment – Forced air circulation
Reexamination Certificate
2005-10-18
2005-10-18
Yan, Ren (Department: 2854)
Electrophotography
Internal machine environment
Forced air circulation
C399S091000, C399S094000, C399S097000
Reexamination Certificate
active
06957026
ABSTRACT:
An electrophotographic marking device includes a xerographic marking module and an environmental control module which controls temperature and relative humidity inside the marking module. The environmental module has a main plenum chamber and a divided or split plenum chamber to create and supply two air streams with different temperatures and/or different humidities and/or different airflow volumes and/or airflow rates to a marking engine. A primary air stream plenum chamber is closed loop controlled by input from one or more temperature and/or humidity sensors in the xerographic module. A secondary air stream plenum chamber is open loop controlled by means of one or more temperature and/or humidity sensors in one or mode developer housings. Heating of the secondary air stream is achieved by heat generated in the developer housing(s) and/or one or more heaters distinct from the developer unit elements. The system achieves balanced, thermodynamically adjusted, air flows.
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Adiletta Mark A.
Dergham Ali R.
Hunter Jonathan B.
LaRocca Andrew C.
Rivera Armando J.
Ghatt Dave A.
Oliff & Berridg,e PLC
Xerox Corporation
Yan Ren
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