Temperature controlling device for fixing unit

Details Temperature controlling device for fixing unit Temperature controlling device for fixing unit

1997-02-04

1998-07-28

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of fixing

165205, 165247, 165294, 399 92, G03G 1520

Patent

active

057873216

ABSTRACT:
A temperature controlling device for an electrophotographic imaging device which has a fixing unit including a heat roller, the fixing unit performing a fixing operation in which toner is fixed on a recording sheet. The temperature controlling device includes a temperature sensing system, arranged about an outer surface of the heat roller such that, for the purpose of temperature measurement, the heat roller is divided into a plurality of areas along a rotational axis of the heat roller, and a temperature of each area is detected by the temperature sensing system; an air blowing system which blows air to each of the plurality of areas separately; and a controller which controls the air blowing system to blow air in accordance with temperatures of the plurality of areas in order to prevent overheating of any portions of the heat roller.

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