DEVELOPMENT DEVICE AND IMAGE-FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide a development device capable of easily imparting a predetermined charge amount to the toner, capable of suppressing spillover of the developer, and capable of forming images of high image quality, while having a simple constitution, without causing the developer conv...

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Bibliographic Details
Main Author SHIGETA KUNIO
Format Patent
LanguageEnglish
Published 15.12.2005
Edition7
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a development device capable of easily imparting a predetermined charge amount to the toner, capable of suppressing spillover of the developer, and capable of forming images of high image quality, while having a simple constitution, without causing the developer conveyance speed to be reduced. SOLUTION: The developing device 8 comprises a developer carrier 800 which has a magnetic field generating means fixed therein and bears and conveys a developer including a toner and carrier; a first stirring member 803 disposed adjacently in a rotating shaft direction of the developer carrier; a second stirring member 805 disposed adjacent in a rotating shaft direction of the first stirring member so as to convey the developer in a direction opposite to a direction of developer conveyance by the first stirring member; and a third stirring member 807, disposed next to the second stirring member so as to convey the developer in the same direction as the second stirring member, wherein a total amount of the developer conveyed by the second and third stirring members is made larger than the amount of the developer conveyed by the first stirring member on an upstream side so that the amounts are made nearly equal at downstream side. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040166922