JPS5799670A - Developing device - Google Patents

Developing device

Info

Publication number
JPS5799670A
JPS5799670A JP17619580A JP17619580A JPS5799670A JP S5799670 A JPS5799670 A JP S5799670A JP 17619580 A JP17619580 A JP 17619580A JP 17619580 A JP17619580 A JP 17619580A JP S5799670 A JPS5799670 A JP S5799670A
Authority
JP
Japan
Prior art keywords
magnetic
pole
blade
magnetic flux
cutting
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
JP17619580A
Other languages
Japanese (ja)
Inventor
Kimio Nakahata
Masaaki Sakurai
Takeshi Watanabe
Fumitaka Kan
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP17619580A priority Critical patent/JPS5799670A/en
Publication of JPS5799670A publication Critical patent/JPS5799670A/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)

Abstract

PURPOSE:To obtain a uniform toner image by eliminating a ground fogging phenomenon at a non-image part by providing a restricting magnet in a sleeve opposite a magnetic blade and by providing a magnetic-flux absorber close to the restricting magnet. CONSTITUTION:In a sleeve 2, a magnetism cutting magnetic pole 3a is provided opposite a magnetic blade 4 which is a restricting means for the thickness of a developer, and a ferromagnetic member 8 made of rubber, etc., containing mixed iron, nickel, etc., is provided near it. Since a magnetic pole with the opposite magnetism is induced by magnetic induction to a part closer to the cutting pole 3a, magnetic flux leaking from the cutting pole 3a to a place right before the blade 4 and magnetic flux leaking toward a carriage pole 3b are damped suddenly through the magnetic attraction of the magnetic block 8 to obtain magnetic flux G2', and the magnetic flux of the cutting pole 3a converges sufficiently to the part of the magnetic blade 4 to obtain magnetic flux G1, thereby maintaining a stable coating.
JP17619580A 1980-12-12 1980-12-12 Developing device Pending JPS5799670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17619580A JPS5799670A (en) 1980-12-12 1980-12-12 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17619580A JPS5799670A (en) 1980-12-12 1980-12-12 Developing device

Publications (1)

Publication Number Publication Date
JPS5799670A true JPS5799670A (en) 1982-06-21

Family

ID=16009290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17619580A Pending JPS5799670A (en) 1980-12-12 1980-12-12 Developing device

Country Status (1)

Country Link
JP (1) JPS5799670A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544093A1 (en) * 1983-04-08 1984-10-12 Canon Kk DEVELOPMENT APPARATUS
US4554234A (en) * 1983-10-19 1985-11-19 Canon Kabushiki Kaisha Toner application method and composition therefor
US4590140A (en) * 1983-10-19 1986-05-20 Canon Kabushiki Kaisha Toner application method and treated magnetic particles for use therein
US4592987A (en) * 1983-10-19 1986-06-03 Canon Kabushiki Kaisha Toner application method and developer composition
JPS63133816A (en) * 1986-11-20 1988-06-06 鐘淵化学工業株式会社 Magnet roll and manufacture of the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544093A1 (en) * 1983-04-08 1984-10-12 Canon Kk DEVELOPMENT APPARATUS
US4554234A (en) * 1983-10-19 1985-11-19 Canon Kabushiki Kaisha Toner application method and composition therefor
US4590140A (en) * 1983-10-19 1986-05-20 Canon Kabushiki Kaisha Toner application method and treated magnetic particles for use therein
US4592987A (en) * 1983-10-19 1986-06-03 Canon Kabushiki Kaisha Toner application method and developer composition
JPS63133816A (en) * 1986-11-20 1988-06-06 鐘淵化学工業株式会社 Magnet roll and manufacture of the same
JPH0682579B2 (en) * 1986-11-20 1994-10-19 鐘淵化学工業株式会社 Magnetoroll and manufacturing method thereof

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