| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a developing apparatus which supplies toner from a toner supply member to a developing roller stably, to prevent scumming and density unevenness, thereby improving image quality, and to provide an image forming apparatus.SOLUTION: A color copying machine as an image forming apparatus includes: a scanner unit; an image processing unit; and a printer unit equipped with a developing apparatus 16 comprising a photoreceptor drum 14, a charger, a recording device, a developing roller 25, a toner supply roller 32, and a thin-layer blade 36. The toner supply roller 32 includes a first electrode member, an insulator, and a second electrode member. A periodic voltage is applied between the first and second electrode members so that a potential difference between the first and second electrode members is temporarily reversed, thereby forming cloud of toner on the toner supply roller 32.</p> |
