PROCESS OF, AND MEANS FOR CHARGING AN IMAGING ELEMENT IN AN ELECTROPHOTOGRAPHIC MACHINE

摘要

The charging station of an electrophotographic copier comprises an overcharging corona device (21) followed by a backcharging corona device (22) which is powered to reduce the charge developed by the overcharging corona device. As it passes through the charging station, unwanted residual toner on the imaging element (20) is charged to a polarity such that it is removed from the element during subsequent passage of the element through a developing station (26).