Patent ID: 6766132
Filing Date: 2004-07-20
Classification: G03G

Abstract:
A developing device comprising:a developer bearing member; and a developer container for containing a developer therein, said developer container including a plurality of developer containing rooms and a plurality of developer conveyers for conveying the developer toward said developer bearing member, wherein said plurality of developer containing rooms are partitioned by plate-shaped members except for openings formed therein through which the developer passes, said openings being located so as to be buried in the developer during non-use of the developer, wherein a rotational speed of a developer conveyer, which is provided in a developer containing room nearest to said developer bearing member, is higher than a rotational speed of other developer conveyers among said plurality of developer conveyers, which are provided in other developer containing rooms among said plurality of developer containing rooms, and wherein said plurality of developer conveyers are sheet-shaped, and said developer conveyer in said developer containing room, which nearest to said developer bearing member, is thinnest among said plurality of developer containers.