Developing Device for Preventing Toner Leakage

摘要

A cartridge is configured to supply developing agent to a peripheral surface of a photosensitive drum. The cartridge includes a frame, a developing roller and first and second side seal members. The developing roller defines an axial direction, and is configured to supply developing agent in the frame to the photosensitive drum. The first side seal member is configured to seal a boundary between the frame and one end portion of the developing roller in the axial direction. The second side seal member is configured to seal a boundary between the frame and another end portion of the developing roller. The first and second side seal members define a gap therebetween in the axial direction, and the gap has a gap length smaller than a width in the axial direction of a maximum width sheet conveyed to the photosensitive drum.

主权项

1. A cartridge for supplying developing agent to a peripheral surface of a photosensitive drum comprising:
a frame; a developing roller rotatable about an axis that defines an axial direction, and configured to supply developing agent in the frame to the photosensitive drum, the developing roller having one end portion and another end portion in the axial direction; a first side seal member configured to seal a boundary between the frame and the one end portion of the developing roller; and a second side seal member configured to seal a boundary between the frame and the another end portion of the developing roller, the first side seal member and the second side seal member defining a gap therebetween in the axial direction, and the gap having a gap length smaller than a width in the axial direction of a maximum width sheet conveyed to the photosensitive drum.