ELECTROPHOTOGRAPHIC PRINTING DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain an electrophotographic printing device in which double-faced multicolor printing with good print quality at a low cost is possible. SOLUTION: A corona discharge device for inversion of the toner polarity on a photoreceptor is disposed facing the photoreceptor and between a developing machine and a corona discharge device for transfer. Voltages applied on the corona discharge device for transfer are inversed between an image forming device equipped with the corona discharge device for inversion of the toner polarity on the photoreceptor and an image forming device not equipped with the above device.