Patent ID: 7457560
Filing Date: 2008-11-25
Classification: G03G

Abstract:
1. A developing device, comprising: a case main body comprising an opening; a developing roller coupled with the case main body at a position facing the opening, the developing roller configured to rotate and support a developer housed in the case main body; an axis direction seal member coupled with the case main body, the axis direction seal member extending along a rotation axis direction of the developing roller, the axis direction seal member sealing between the case main body and the developing roller by making contact with the developing roller; and a side seal member coupled with the case main body, the side seal member sealing between the case main body and an end portion of the developing roller in the rotation axis direction by making contact with the end portion of the developing roller, wherein the axis direction seal member and the side seal member make contact with one another such that there is no gap between the axis direction seal member and the side seal member in the rotation axis direction, and in a rotation direction of the developing roller, an upstream end of the side seal member is located downstream of an upstream end of a contact area between the axis direction seal member and the developing roller.