摘要 |
A developing apparatus is provided which can suppress a fluctuation in image density in a discontinuous printing mode provided with a pause period. The developing apparatus includes a developer for developing an electrostatic latent image on a photosensitive drum, a developer bearing member for carrying and conveying the developer and a developer layer thickness-regulating unit placed close to the developer bearing member for regulating the amount of the developer carried and conveyed by the developer bearing member, the developer layer thickness-regulating unit being. As the developer, a negatively chargeable, one-component, magnetic toner is used having magnetic toner particles containing a binder resin and a magnetic iron oxide particle, and has a specific saturation magnetization, specific weight-average particle diameter and specific composition. The developer bearing member includes a surface layer containing a binder resin, a quaternary ammonium salt, graphitized particles, and conductive, spherical resin particles, and has a specific surface shape. |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
MATSUDA, TAKUMA;SHIMAMURA, MASAYOSHI;AKASHI, YASUTAKA;OTAKE, SATOSHI;ITO, MINORU;WAKABAYASHI, KAZUHITO;YOSHIBA, DAISUKE |