Electrophotography – Internal machine environment – Forced air circulation
Patent
1995-08-02
1999-01-12
Royer, William J.
Electrophotography
Internal machine environment
Forced air circulation
399 94, G03G 2120
Patent
active
058600426
ABSTRACT:
A cooling fan is rotated to cool an irradiation lamp and a read sensor during the reading operation and the standby period both. Although an airflow from the cooling fan is maximized during the reading operation, the airflow is reduced to the extent that a temperature rise originating from the self-generation of heat on the part of the read sensor in the standby condition is suppressed. Thus the temperature of the read sensor is kept constant and the characteristics of the read sensor are prevented from fluctuating. The airflow from the cooling fan can also be regulated by controlling the operating voltage to be applied to a motor for rotating the cooling fan and placing movable airflow regulating plates in the passage of the wind blown from the cooling fan. Thereby, accurate reading can be conducted in any color image reading apparatus since it is possible to minimize variation in the temperature of a read sensor for a certain time after the image reading operation is started.
REFERENCES:
patent: 4774550 (1988-09-01), Igarashi
patent: 5040031 (1991-08-01), Hayashi
patent: 5138375 (1992-08-01), Iimori
patent: 5177626 (1993-01-01), Nosaki et al.
patent: 5341196 (1994-08-01), Hodoshima et al.
Isozaki Naoki
Tomaru Takashi
Fuji 'Xerox Co., Ltd.
Royer William J.
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