JPS5786837A - Preparation of electrophotographic developing carrier - Google Patents

Preparation of electrophotographic developing carrier

Info

Publication number
JPS5786837A
JPS5786837A JP55162979A JP16297980A JPS5786837A JP S5786837 A JPS5786837 A JP S5786837A JP 55162979 A JP55162979 A JP 55162979A JP 16297980 A JP16297980 A JP 16297980A JP S5786837 A JPS5786837 A JP S5786837A
Authority
JP
Japan
Prior art keywords
carrier particles
powder
fine
fine hard
magnetic field
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.)
Granted
Application number
JP55162979A
Other languages
Japanese (ja)
Other versions
JPS6356980B2 (en
Inventor
Hiroyuki Kobayashi
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 JP55162979A priority Critical patent/JPS5786837A/en
Publication of JPS5786837A publication Critical patent/JPS5786837A/en
Publication of JPS6356980B2 publication Critical patent/JPS6356980B2/ja
Granted 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
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1132—Macromolecular components of coatings
    • G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/1134—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds containing fluorine atoms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1139—Inorganic components of coatings

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inorganic Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

PURPOSE:To prevent toner from being pulverized to a fine powder and attaching to a carrier surface, etc. especially in the magnetic brush development method, and to always obtain a superior image, by mixing resin coated carrier particles with a fine hard powder to bring both into full contact and to form a rugged rough surface on each particle. CONSTITUTION:Carrier particles obtained by coating the reduced iron powder surface with polyvinyl fluoride or the like resin and a fine hard powder, such as diamond dust or silicon carbide in an equal mixing weight ratio are mixed and brought into full contact for a proper treatment time. The resultant mixture is sucked in a strong magnetic field to separate only the fine hard powder, leaving the coated carrier particles with rugged surfaces in the magnetic field. These carrier particles and a toner are well mixed to form a developer for use in a magnetic brush developing device, thus permitting an always sharp, high contrast superior electrophotographic image free from rubbed parts or uneven parts.
JP55162979A 1980-11-19 1980-11-19 Preparation of electrophotographic developing carrier Granted JPS5786837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55162979A JPS5786837A (en) 1980-11-19 1980-11-19 Preparation of electrophotographic developing carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55162979A JPS5786837A (en) 1980-11-19 1980-11-19 Preparation of electrophotographic developing carrier

Publications (2)

Publication Number Publication Date
JPS5786837A true JPS5786837A (en) 1982-05-31
JPS6356980B2 JPS6356980B2 (en) 1988-11-09

Family

ID=15764906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55162979A Granted JPS5786837A (en) 1980-11-19 1980-11-19 Preparation of electrophotographic developing carrier

Country Status (1)

Country Link
JP (1) JPS5786837A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260159A (en) * 1990-07-12 1993-11-09 Minolta Camera Kabushiki Kaisha Developer for full color copy containing light-transmittable toner and resin-coated carrier having pores
EP0638849A2 (en) * 1993-07-08 1995-02-15 Kao Corporation Toner and developer composition containing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478137A (en) * 1977-12-05 1979-06-22 Ricoh Co Ltd Carrier material for electrostatic developer
JPS55114088U (en) * 1979-01-31 1980-08-11

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478137A (en) * 1977-12-05 1979-06-22 Ricoh Co Ltd Carrier material for electrostatic developer
JPS55114088U (en) * 1979-01-31 1980-08-11

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260159A (en) * 1990-07-12 1993-11-09 Minolta Camera Kabushiki Kaisha Developer for full color copy containing light-transmittable toner and resin-coated carrier having pores
EP0638849A2 (en) * 1993-07-08 1995-02-15 Kao Corporation Toner and developer composition containing the same
US5472819A (en) * 1993-07-08 1995-12-05 Kao Corporation Toner and developer composition containing the same
EP0638849A3 (en) * 1993-07-08 1995-12-27 Kao Corp Toner and developer composition containing the same.

Also Published As

Publication number Publication date
JPS6356980B2 (en) 1988-11-09

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