Develop roller, develop unit, process cartridge and image forming apparatus

A develop roller (115) includes a magnet roller (133), and a develop sleeve (132) containing the magnet roller (133) and comprising a plurality of depressions (139) in an elliptic shape regularly arranged with an interval in a longitudinal direction on a surface onto which developer (126) is attract...

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Bibliographic Details
Main Authors KOETSUKA, KYOHTA, TAKANO, YOSHIYUKI, TERASAKA, TAKUMI, OHSAWA, MASAYUKI, KAMIYA, NORIYUKI, INNAMI, TAKASHI, KOJIMA, TOSHIO
Format Patent
LanguageEnglish
French
German
Published 09.11.2011
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:A develop roller (115) includes a magnet roller (133), and a develop sleeve (132) containing the magnet roller (133) and comprising a plurality of depressions (139) in an elliptic shape regularly arranged with an interval in a longitudinal direction on a surface onto which developer (126) is attracted by a magnetic force of the magnet roller (133), in which the depressions (139) are arranged such that a longitudinal direction of the depressions (139) is intersected with the longitudinal direction of the develop sleeve (132), and a downstream side of the depressions (139) are formed to be deeper than an upstream side in a rotary direction of the develop sleeve (132).
Bibliography:Application Number: EP20110250490