JPS5683773A - Corona separating method - Google Patents

Abstract

PURPOSE: To ensure the steady separation of corona to prevent a jam, by varying the separating conditions according to the type of the transfer paper plus the factors such as the temperature, humidity and the like which affect the separation.

CONSTITUTION: The power source using both the AC and DC power sources is used for the isolating high-voltage power source which applies the voltage to the separating corona discharger 7. In this power source, the AC output of the high voltage generator HVG is converted to the appropriate voltage through the transformer T, and the voltage of the DC power source is turned to a fixed level of voltage via the constant voltage circuit VS to be applied to the capacitor C. The inter- terminal voltage of the capacitor C compounded with the AC output of the transformer T to be applied to the discharger 7. In general, the more the water content of the transfer paper the less the DC component of the separated current. And when the water content of the transfer paper increases, the separation enable range is reduced. In this connection, a humidity sensor is installed here to vary the bias voltage VB by the humidity, thus increasing the range of separation. In such way, the separating conditions is varied to ensure the steady separation of corona.

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