An electrophotographic imaging apparatus includes a toner image holding body, a transcription unit for transcribing the toner image on the toner image holding body onto a recording medium, and a conveyor for conveying a recording medium toward the toner image holding body and transcription unit....http://www.google.es/patents/US5761568?utm_source=gb-gplus-sharePatente US5761568 - Electro-photographic apparatus having transfer bias control
Electro-photographic apparatus having transfer bias control
