Patent ID: 8849166
Filing Date: 2014-09-30
Classification: G03G

Abstract:
1. A developing device comprising: a developer supporting rotator including a first rotating sleeve and a developer supporting side magnetic member, a toner supporting rotator including a second rotating sleeve and a toner supporting side magnetic member, a voltage application unit configured to apply a developing bias voltage between the toner supporting rotator and the image carrier, such that the toner supported by the toner supporting rotator flies to an electrostatic latent image on a surface of an image carrier in order to develop the electrostatic latent image into a toner image, wherein a longitudinal end portion of the toner supporting side magnetic member is positioned more longitudinally outside than a longitudinal end portion of the developer supporting side magnetic member, and wherein a surface of the second rotating sleeve positioned more outside than the end of the developer supporting side magnetic member is composed of a surface of low adherence having lower toner adherence and a higher dielectric constant than those of a surface positioned more inside.