| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an image forming device capable of reducing the wear occurring among a photoreceptor, a developing roller rotating in contact with the photoreceptor, and a supplying roller in press-contact with the developing roller, capable of improving the image quality, and capable of forming the carrying path of a paper in a nearly straight line state and forming an image on a cardboard. SOLUTION: Since a supplying roller 55 is rotated and driven in a direction opposite to the rotating direction of the developing roller 56 so that the circumferential speed of the roller 55 may be about twice as high as that of the roller 56, toner 53 is sufficiently supplied from the roller 55, and the toner 53 having positive polarity adheres to the surface of the roller 56 with two layer thickness in a state where about +350V are impressed as a developing bias voltage, therefore, the toner 53 is attracted to an electrostatic latent image voltage (about +100V) which is lower than that of the toner 53, and adheres only to an electrostatic latent image formed on a photoreceptor 20, and developing processing is performed, so that developing efficiency becomes about 100%.</p> |
