| 摘要 |
<p>An electrophotographic image forming apparatus comprising a photoreceptor for forming an image corresponding to an original, a main charger for charging the image in a specific polarity, a developer for developing the image with toner, a transference charger for transferring the image on the surface of the photoreceptor, and switching devices for switching the utilization of the toner inside the developer and the polarities of a voltage applied to the transference charger.</p> |
