| 摘要 |
PURPOSE:To obtain the uniform image of a sufficient image density without fogging and further, unevenness in a density by forming the surface of a devel oper carrier in a tooth shape, arranging a tooth-shaped projection so as to face a regulating member and specifying the average height of the projection. CONSTITUTION:This developing device is composed of the developer carrier supplying a developer 2 to latent image carrier and the regulating member putting the developer 2 on the developer carrier in a uniform thin layer. The developer carrier is constituted of at least an elastic body 5, its surface has the tooth shape and the tooth-shaped projection A is arranged so as to face the regulating member. The average height H1 of the tooth-shaped projection A of the surface of the elastic body is <=8mum. Moreover, it is preferable that a surface roughness Rmax in a pitch of the tooth shape on the surface of the elastic body is <=3mum and the pitch P of the tooth shape is <=50mum. Thus, a one-component developer is uniformly carried onto the developer carrier and uniformly electrified to always and stably supply the developer to the latent image carrier. |
