Patent ID: 7949282
Filing Date: 2011-05-24
Classification: G03G

Abstract:
1. A developing device comprising: a housing; a developing roller that is rotatably provided in the housing and configured to carry developer; a supply roller provided in the housing, the supply roller configured to supply the developer to the developing roller; a developer cartridge that is attachable to and detachable from the housing and houses the developer; a first sealing member that is provided at both ends of a longitudinal direction of the developing roller and slidably contacts a circumferential surface of the developing roller for preventing leakage of the developer from the housing, the first sealing member including an inner end portion; a developer passage opening for passage of the developer provided in at least one of the housing and the developer cartridge; and a second sealing member provided in a vicinity of the developer passage opening for preventing leakage of the developer from the developer passage opening, at least a part of the second sealing member overlapping the first sealing member in a direction in which the developer cartridge is attachable to and detachable from the housing, wherein the second sealing member is arranged such that: wherein the developer cartridge is attachable to and detachable from the housing at a position opposed to the developing roller with reference to the supply roller.