Patent ID: 7526225
Filing Date: 2009-04-28
Classification: G03G

Abstract:
1. A developing apparatus comprising: a case having a slit-shaped opening and a holder, the holder being configured to communicate with the opening and to hold developer, the opening being formed in a longitudinal direction; a first wall portion provided at an upper side of the opening, the first wall portion extending along a longitudinal direction of the opening and along a communication direction extending between the opening and the holder; a second wall portion extending from the first wall portion in both the longitudinal direction and a height direction perpendicular to both the communication direction and longitudinal direction; a developer retainer configured to retain the developer on a surface thereof, the developer retainer being arranged at the opening along the longitudinal direction of the opening and rotatably supported at the case; a layer thickness regulating member comprising: a first sealing portion interposed between the first wall portion and the first supporting portion, the first sealing portion being configured to seal a space between the first wall portion and the first supporting portion; and a second sealing portion interposed between the second wall portion and the second supporting portion, the second sealing portion being configured to seal a space between the second wall portion and the second supporting portion; wherein the first sealing portion and the second sealing portion are formed integrally.