JPS5616163A - Magnetic brush developing unit - Google Patents

Magnetic brush developing unit

Info

Publication number
JPS5616163A
JPS5616163A JP9128079A JP9128079A JPS5616163A JP S5616163 A JPS5616163 A JP S5616163A JP 9128079 A JP9128079 A JP 9128079A JP 9128079 A JP9128079 A JP 9128079A JP S5616163 A JPS5616163 A JP S5616163A
Authority
JP
Japan
Prior art keywords
magnetic
developer
permanent magnet
magnetic brush
unmovable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9128079A
Other languages
Japanese (ja)
Inventor
Toshio Kawakubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP9128079A priority Critical patent/JPS5616163A/en
Publication of JPS5616163A publication Critical patent/JPS5616163A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To prevent the ground soiling of picture, by providing an electromagnet, whose polarity is inverted in the developing position of the unmovable material holding a permanent magnet and by arranging many magnetic poles of the electromagnet so that they may be different in polarity in the axis direction and the circumference direction of the unmovable material.
CONSTITUTION: Developer carrying permanent magnet 2 is buried on the circumference of fixed magnet holder 1 consisting of nonmagnetic materials and is so arranged that polarities may be opposite to each other. The developer consisting of magnetic carriers and toner which are sucked by permanent magnet 2 and are put on sleeve 4 receives magnetic field action while the developer is carried near photosensitive material 10, and the developer becomes infinite magnetic dipoles to form orderly crests of a magnetic brush along the magnetic force line on sleeve 4. When the developer moves to the developing position under this state, the magnetic brush becomes a soft magnetic brush due to action of alternating magnetic fields of magnetic poles 33a, 33b, 35a and 35b to develop the toner. As a result, high- efficient development is possible where the texture of the picture can be prevented from being soiled.
COPYRIGHT: (C)1981,JPO&Japio
JP9128079A 1979-07-17 1979-07-17 Magnetic brush developing unit Pending JPS5616163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9128079A JPS5616163A (en) 1979-07-17 1979-07-17 Magnetic brush developing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9128079A JPS5616163A (en) 1979-07-17 1979-07-17 Magnetic brush developing unit

Publications (1)

Publication Number Publication Date
JPS5616163A true JPS5616163A (en) 1981-02-16

Family

ID=14022041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9128079A Pending JPS5616163A (en) 1979-07-17 1979-07-17 Magnetic brush developing unit

Country Status (1)

Country Link
JP (1) JPS5616163A (en)

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