Patent ID: 8515315

Claim:
A developing device comprising: a rotatable developer bearing body configured to bear a developer; a first developer supply member that contacts the developer bearing body at a first contact portion to supply the developer to the developer bearing body and that is rotatable in the same direction as the developer bearing body; a layer thickness adjusting member that contacts the developer bearing body at a second contact portion to adjust a thickness of a layer of the developer on the developer bearing body; a second developer supply member configured to move the developer in the vicinity of the first developer supply member to the first developer supply member; and a compression member that opposes, and that is out of contact with, the first developer supply member, and that is configured to direct the developer moved by the second developer supply member to the first developer supply member and compress the developer onto the first developer supply member, wherein the compression member lies downstream of the first contact portion, and upstream of the second contact portion, in the rotational direction of the developer bearing body.