Patent ID: 7546071

Claim:
A developing device provided in an electrophotographic image forming apparatus, comprising: a developer tank having an internal space for containing a toner; a developing roller for carrying a toner layer on a surface thereof and supplying a toner to an electrostatic latent image on a photoreceptor drum; a doctor blade in contact with a surface of the developing roller, for regulating a layer thickness of the toner layer on the surface; and a cleaning member composed of a platy member, the cleaning member being disposed so that one end of the cleaning member extends in parallel with an axis line of the developing roller and makes angular contact with a contact portion of the doctor blade with the developing roller and its adjacent portion of the doctor blade while another end of the cleaning member is inserted into a through hole formed in a developer tank wall of the developer tank and extends to outside of the developer tank, wherein the cleaning member is curved at a portion between both ends of the cleaning member.