DEVELOPING ROLLER IN IMAGE FORMING DEVICE AND ITS MANUFACTURE

PURPOSE:To impart a rotational force to a carrier attracted on the surface of a photoreceptor and to prevent the carrier attraction by making the width of the magnetic density distribution curve small at the tip side in the direction along the peripheral direction of a sleeve roller in the area corr...

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Bibliographic Details
Main Authors KAWADA YASUHIRO, TANAKA YOSHIHIKO
Format Patent
LanguageEnglish
Published 19.01.1996
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
CINEMATOGRAPHY
ELECTRICITY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
INDUCTANCES
MAGNETOGRAPHY
MAGNETS
PHOTOGRAPHY
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:PURPOSE:To impart a rotational force to a carrier attracted on the surface of a photoreceptor and to prevent the carrier attraction by making the width of the magnetic density distribution curve small at the tip side in the direction along the peripheral direction of a sleeve roller in the area corresponding to the part for feeding the toner to the photoreceptor on the magnet roller. CONSTITUTION:The developing roller 4 is constituted so that different plural magnetic poles S1, N1, S2, S3 and N2 are arranged in this order in the peripheral direction inside the magnet roller 3 disposed in a stationary state inside the rotating sleeve roller 2. One magnetic pole N1 out of the magnetic poles is provided with the function for forming the developer into a napping state and this part becomes the carrier feeding area B. Then, the width of the magnetic density distribution curve E in the feeding area B is formed so as to become small on the tip side in the direction along the peripheral direction of the sleeve roller 2.
Bibliography:Application Number: JP19940170035