Patent ID: 7218882
Filing Date: 2007-05-15
Classification: G03G

Abstract:
1. A developing device for developing a latent image formed on an image bearing member by using developer, the developing device comprising: a developing frame; a developing roller configured and positioned to supply developer to the latent image to develop the latent image; and a developer layer regulating member which regulates a layer thickness of developer on a circumferential surface of said developing roller, said developer layer regulating member having a first surface and a second surface along a longitudinal direction of said developer layer regulating member, to position said developer layer regulating member with respect to said developing frame, wherein a first imaginary plane, which is obtained by extending the first surface imaginarily, and a second imaginary plane, which is obtained by extending the second surface imaginarily, intersect each other, wherein a positioning portion in the first surface of the developer layer regulating member comprises a groove to effect positioning in a direction perpendicular to the longitudinal direction of the developer layer regulating member.