Patent ID: 8515319
Filing Date: 2013-08-20
Classification: G03G

Abstract:
1. A developing unit comprising: a cylindrical magnetic member having a plurality of magnetic poles in a circumferential direction, the plurality of magnetic poles including a first pole attracting developer and a second pole not attracting developer; a developer holding member that has the cylindrical magnetic member therein and conveys developer magnetically attracted by the cylindrical magnetic member on a surface thereof in a direction toward a predetermined area where developer is not attracted by a magnetic field caused by the second pole; a peeling member that is provided in the predetermined area and peels off the developer attracted at an end portion of the developer holding member in an axial direction; and a second magnetic member that is provided on at least one of an upstream side opposed to the predetermined area and a downstream side of the peeling member, and that is disposed in a position with a gap from the surface of the developer holding member, wherein the peeling member is provided only at a position corresponding to the end portion of the developer holding member in the axial direction, wherein the peeling member contacts the surface of the developer holding member.