Patent ID: 9298133
Filing Date: 2016-03-29
CPC Classification: G03G

Claim Text:
1. A developing device comprising: a developing roller having a rotational axis extending in an axial direction; a casing having a groove, the groove being defined by a first wall, a second wall, and a third wall, the second wall extending from the first wall toward the developing roller in an extending direction; and a seal disposed in the groove at a position on the first wall and in contact with a peripheral surface of the developing roller, the seal including: wherein the second wall has a first surface extending from the first end of the contact surface of the first wall and forms an angle with the contact surface of less than 180°, wherein a surface of the third wall extends from the second end of the contact surface of the first wall and forms an angle with the contact surface of less than 180°, wherein the second wall at least partially overlaps the seal when viewed in a first direction parallel to the contact surface of the first wall and perpendicular to the axial direction of the developing roller, and the third wall at least partially overlaps the seal when viewed in a second direction parallel to the contact surface of the first wall and perpendicular to the axial direction of the developing roller, and wherein the first surface of the second wall faces in a third direction, the second wall having a second surface facing in a fourth direction, the first surface extending in the extending direction and contacting with the substrate of the seal, the second surface facing away from the first surface.