Patent ID: 8249490

Claim:
An image transfer device, comprising: an image carrying member having a surface charged at a predetermined potential; a latent image forming device that forms an electrostatic latent image on the surface of the image carrying member; a developing device that develops the electrostatic latent image formed on the surface of the image carrying member to form a toner image; a transfer section including a conductive roller opposed with the toner image developed on the image carrying member via a transfer medium and applies a voltage having an opposite polarity from the polarity of an electric charge of the toner image to electrostatically transfer the toner image on the transfer medium; a power supply device that applies a transfer bias voltage to the conductive roller including a voltage generating portion; and a resistance element connected between the voltage generating portion of the power supply device and the conductive roller in series, wherein, assuming that the value of resistance R0 of the resistance element is 1.0, a range of resistance of the synthetic value of resistance R of the transfer section connected to the resistance element in series is set as: 0.4≦R≦6.0.