Patent ID: 9116463
Filing Date: 2015-08-25
Classification: G03G

Abstract:
1. A developing device comprising: a housing configured to accommodate developer therein; a developing roller rotatably provided to the housing; a plate-shaped layer thickness regulation blade configured to contact the developing roller and regulate a layer thickness of the developer on the developing roller; a first seal member arranged between the housing and the layer thickness regulation blade; and a second seal member arranged between the housing and the developing roller at an end portion of the developing roller in an axis line direction of the developing roller, wherein the first seal member is arranged adjacent to the second seal member in a rotating direction of the developing roller, wherein the second seal member includes a first member contacting a circumferential surface of the developing roller and a second member arranged between the housing and the first member, wherein the second member includes a protruding portion that, in the rotating direction of the developing roller, protrudes more towards the first seal member than the first member, and wherein end portions of the first member and the second member in the rotating direction of the developing roller are respectively configured to contact the first seal member.