Electrophotography – Control of electrophotography process – Responsive to number of copies or passage of time
Patent
1998-11-25
1999-10-12
Pendegrass, Joan
Electrophotography
Control of electrophotography process
Responsive to number of copies or passage of time
399 44, G03G 1500
Patent
active
059665572
ABSTRACT:
The differences in the detected values of temperature and humidity between the time at which the suspension of operation begins and the time at which operation is restored are sought, and the differences are compared with their respective prescribed thresholds. If the difference in temperature is less than the threshold and the difference in relative humidity is less than the threshold, as an example, it is determined that the environmental change during the period of suspension of operation is less than the threshold, and the copying machine is made ready immediately without performing image stabilizing control. On the other hand, where the difference in temperature equals or exceeds the threshold, or where the difference in relative humidity equals or exceeds the threshold, it is determined that the environmental change during the period of suspension of operation equals or exceeds the threshold, whereupon image stabilizing control is executed and the image forming operation parameters are set. The copying machine is then made ready.
REFERENCES:
patent: 4592646 (1986-06-01), Suzuki et al.
patent: 5057867 (1991-10-01), Ishigaki et al.
patent: 5387965 (1995-02-01), Hasegawa et al.
patent: 5548378 (1996-08-01), Ogata et al.
Minolta Co. , Ltd.
Pendegrass Joan
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