| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device in which adsorption bias is applied to a paper sheet to accurately keep paper transport using a transport belt and a correct image transfer is performed without obstructing untransferred toner and a transfer current. SOLUTION: A transfer part is formed by a photoreceptor drum 21 and a transfer brush 26. The upstream side of a transport belt 25 is supported by a driven rotating roller 29, and an adsorption charged roller 31 is pressed to the above roller to transport a paper sheet P. High adsorption bias voltage is applied from a power supply 32-1 to the leading end margin part and the trailing end margin part of the paper sheet P through a switch 33, and low adsorption bias voltage is applied from a power supply 32-2 to the printing area of the paper sheet P or voltage is not applied thereto. The paper sheet P is transported with the leading end margin adsorbed to the transport belt 25 in a stable state to the transfer part. In the transfer part, the printing area with low electric charge of the paper sheet P is made close and pressed to the surface of the photoreceptor drum 21 bearing a toner image, so that untransferred toner is not disturbed by high adsorption electric charges of the paper sheet before transfer so as to form an image of high quality. |
