A developing device includes a housing, a developing roller that carries developer, a supply roller for supplying the developer, a developer cartridge that accommodates the developer, a first sealing member that is provided at both ends of the developing roller, a developer passage opening provided in...http://www.google.es/patents/US7949282?utm_source=gb-gplus-sharePatente US7949282 - Developing device and image forming apparatus including the same
Developing device and image forming apparatus including the same
