Unit, cleaning unit, process cartridge, and image forming apparatus

摘要

A cleaning unit usable with an image forming apparatus includes a cleaning blade, supported by a frame and including a free end contactable to an image bearing drum, for removing a developer from the drum; a first seal provided between the frame and the blade by injection molding into the frame adjacent to a longitudinal end portion of the blade, the first seal being effective to prevent developer leakage; and a second seal provided between the drum and the frame in contact with the free end of the blade adjacent to the longitudinal end portion, wherein the first seal includes a seal portion contacting the blade, and a seat supporting the second seal, the seat being deformable to move the second seal to urge the second seal to the free end of the blade when the drum is mounted to the frame.

主权项

1. A cleaning unit usable with an image forming apparatus, said cleaning unit comprising:
a frame; a developer accommodating portion for accommodating a developer; a cleaning blade, supported by said frame and including a free end contactable to an image bearing member, for removing a developer from the image bearing member; a first sealing member provided between said frame and said cleaning blade by injection molding into said frame adjacent to a longitudinal end portion of said cleaning blade, said first sealing member being effective to prevent leakage of the developer from said developer accommodating portion; and a second sealing member provided between the image bearing member and said frame in contact with the free end of said cleaning blade adjacent to the longitudinal end portion, wherein said first sealing member includes:
(i) a seal portion contacting said cleaning blade, and(ii) a seat portion to which at least a part of said second sealing member is mounted such that said second sealing member and said seat portion are overlapped with each other in a direction in which said first sealing member and said cleaning blade are arranged.