| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a hybrid type development device capable of improving reproducibility of thin lines and fine dots and suppressing uneven density or background density. <P>SOLUTION: A development device comprises development rollers 21a and 21b which carry toner on the outer peripheral surface and are arranged along the rotating direction of a photoreceptor 1 and in non-contact with the photoreceptor 1, and a developer carrier roller 23 which carries a developer composed of toner and carrier and supply toner to the development rollers 21a and 21b. The toner is attached to an electrostatic latent image by an electric field formed between the voltage of the electrostatic latent image formed on the photoreceptor 1 and the AC bias voltage applied to the development rollers 21a and 21b. A amount of developing toner after passing through a development area a upstream of the photoreceptor 1 in the rotating direction is larger than an amount of developing toner after passing through a development area b downstream of the rotating direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
