An image forming apparatus includes a movable image bearing member; an image forming device for forming a toner image on the image bearing member; image transfer device for transferring the toner image from the image bearing member to a transfer material at an image transfer station, wherein the transfer...http://www.google.es/patents/US5179397?utm_source=gb-gplus-sharePatente US5179397 - Image forming apparatus with constant voltage and constant current control
Image forming apparatus with constant voltage and constant current control
