Patent ID: 8600261
Filing Date: 2013-12-03
Classification: G03G

Abstract:
1. A developing unit, comprising: a developing body configured to develop an image using developer; a supply member configured to supply the developer to the developing body; a first frame in which at least one of the developer, developing body, and supply member is arranged; a partition frame provided separately from the first frame and installed to the first frame between the developing body and an agitator, the partition frame having a developer supply opening through which the developer is supplied to the developing body by the agitator; and a removal member detachably attached to the partition frame in such a manner to cover at least a part of the developer supply opening; wherein the first frame includes a lower frame and an upper frame coupled to an upper portion of the lower frame, the lower and upper frames together defining developer storage part; wherein the partition frame is arranged between the lower frame and the upper frame, wherein the lower frame respectively have a first supporting groove and a second supporting groove positioned to oppose each other, lower and upper ends of the partition frame being respectively received into, and thereby supported by, the first and second supporting grooves, wherein the lower frame has formed in opposing sides thereof third supporting grooves, side ends of the partition frame being received into, and thereby supported by, the third supporting grooves, wherein the partition frame is bonded to the lower frame and to the upper frame, wherein the partition frame includes bonding protrusions for bonding the partition frame to the lower frame and to the upper frame, and wherein each of the side ends of the partition frame includes a stepped surface in contact with a correspondingly shaped stepped surface of respective corresponding one of the third supporting grooves, and further comprising: