Patent ID: 9471010
Filing Date: 2016-10-18
CPC Classification: G03G

Claim Text:
1. A developing device comprising: a casing configured to store a developing agent; a developing agent carrier configured to carry the developing agent in the casing, the developing agent carrier configured to rotate about an axis extending in a first direction; a layer-thickness regulating member configured to regulate a thickness of a layer of the developing agent carried on the developing agent carrier; and a first seal member disposed between the layer-thickness regulating member and the casing and is disposed to oppose the layer-thickness regulating member in a second direction perpendicular to the first direction, the first seal member extending along the first direction and including a first end and a second end and including an upper side and lower side, wherein the casing includes a first regulating portion configured to regulate a movement of the first seal member in the first direction by contacting the first end of the first seal member that is non-parallel with respect to the first direction and the casing including a second regulating portion configured to regulate a movement of the first seal member in the first direction by contacting the second end of the first seal member that is non-parallel with respect to the first direction, wherein the casing includes a plurality of third regulating portions spaced from each other configured to regulate a movement of the first seal member in a third direction perpendicular to the second direction and the first direction, and wherein the third regulating portions contact the upper side of the first seal member, wherein the plurality of third regulating portions are formed with upper ribs spaced from each other in the first direction, and wherein the first seal member includes a plurality of upper protrusions protruding in the third direction and each of the upper protrusions is disposed between a pair of the upper ribs.