JPS5767959A - Magnetic brush developing device - Google Patents

Magnetic brush developing device

Info

Publication number
JPS5767959A
JPS5767959A JP55144145A JP14414580A JPS5767959A JP S5767959 A JPS5767959 A JP S5767959A JP 55144145 A JP55144145 A JP 55144145A JP 14414580 A JP14414580 A JP 14414580A JP S5767959 A JPS5767959 A JP S5767959A
Authority
JP
Japan
Prior art keywords
developer
development
magnetic brush
sleeve
magnet
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
JP55144145A
Other languages
Japanese (ja)
Inventor
Izumi Tagiwa
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 JP55144145A priority Critical patent/JPS5767959A/en
Publication of JPS5767959A publication Critical patent/JPS5767959A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To reduce the scattering of toner from a magnetic brush at the position immediately before the development part, by setting <=1.1 density ratio right before the development between the developer on a developer supplying member and the developer on a developer supplying member that contacts with an electrostatic latent image carrier. CONSTITUTION:A magnetic brush development device 11 contains a development roller 14 consisting of a nonmagnetic sleeve 12 that turns counterclockwise plus a permanent magnet 13 fixed to the inside of the sleeve 12. The magnet 13 is made of one piece of magnet, and the developer on the sleeve 12 is dipped up by the magnet 13. At the same time, a continuous magnetic brush is formed from a doctor part through the development part. Thus the density of each developer does not change so much immediately before development and on the sleeve surface that has passed through the doctor part. The density of developer increase at the development part, and the density ratio becomes a little larger than 1.0.
JP55144145A 1980-10-14 1980-10-14 Magnetic brush developing device Pending JPS5767959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55144145A JPS5767959A (en) 1980-10-14 1980-10-14 Magnetic brush developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55144145A JPS5767959A (en) 1980-10-14 1980-10-14 Magnetic brush developing device

Publications (1)

Publication Number Publication Date
JPS5767959A true JPS5767959A (en) 1982-04-24

Family

ID=15355262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55144145A Pending JPS5767959A (en) 1980-10-14 1980-10-14 Magnetic brush developing device

Country Status (1)

Country Link
JP (1) JPS5767959A (en)

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