DEVELOPMENT DEVICE

A development device including a plurality of development sleeves and conducting development sleeve end portion seal using magnet members, a second magnetic pole and a third magnetic pole of a magnet incorporated in a second developer bearing member form repulsive poles. A position on the magnet mem...

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Bibliographic Details
Main Author FURUKAWA MITSUHIRO
Format Patent
LanguageEnglish
Published 31.03.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:A development device including a plurality of development sleeves and conducting development sleeve end portion seal using magnet members, a second magnetic pole and a third magnetic pole of a magnet incorporated in a second developer bearing member form repulsive poles. A position on the magnet member facing a rotation direction downstream end of the second developer bearing member is configured to be included in a zero Gauss zone. As a result, developer leak in the development sleeve rotation direction from between two development sleeves is suppressed.
Bibliography:Application Number: US201514863285