Sealing assembly, developing device, process unit, and image forming apparatus incorporating same

A developing device comprising:

• a developing roller disposed in the opening in a direction traversing the opening to convey powder held on a surface thereof from inside to outside an opening by rotation;
• and
• a sealing assembly including a sealing member to slidably contact a surface of an end of the developing roller in an axial direction of the developing roller,
• wherein the sealing member has an end in a circumferential direction thereof to contact the surface of the developing roller with a first pressure,
• the end in the circumferential direction is fixed to a bearing surface formed on the opening, on at least one of an upstream side and a downstream side in a rotation direction of the developing roller, and
• the sealing member has an intermediate portion between an upstream end and a downstream end in the circumferential direction to contact the surface of the developing roller with a second pressure lower than the first pressure.