Xerographic printing apparatus, varying bias during the transfer step

摘要

In a xerographic printing apparatus, during the transfer step wherein marking material is electrostatically transferred from the photoreceptor to the print sheet by a transfer corotron and the sheet is then detached from the photoreceptor by a detack corotron, the bias associated with the transfer corotron is maintained at a constant value while the bias associated with the detack corotron is progressively decreased to approximately zero as the print sheet moves through the transfer zone.