JPS57141647A - Developer for electrophotography - Google Patents

Developer for electrophotography

Info

Publication number
JPS57141647A
JPS57141647A JP56026073A JP2607381A JPS57141647A JP S57141647 A JPS57141647 A JP S57141647A JP 56026073 A JP56026073 A JP 56026073A JP 2607381 A JP2607381 A JP 2607381A JP S57141647 A JPS57141647 A JP S57141647A
Authority
JP
Japan
Prior art keywords
carrier
toner
developer
soln
aggregated carrier
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
JP56026073A
Other languages
Japanese (ja)
Inventor
Tetsuo Isoda
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 JP56026073A priority Critical patent/JPS57141647A/en
Publication of JPS57141647A publication Critical patent/JPS57141647A/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
    • 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

Landscapes

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

Abstract

PURPOSE:To obtain a 2-component developer having a long life and capable of properly charging the toner over a long term by mixing a toner with an aggregated carrier which is gradually pulverized by agitation and mixing during use. CONSTITUTION:Iron powder, cobalt powder or the like having about 20-75mum particle size is dipped in a resin soln. such as a soln. of methyl methacrylate resin in toluene and heated to evaporate the solvent. The resulting solid substance is pulverized and classified to form an aggregated carrier having about 70-300mum diameter. The carrier is composed of about 40-100 fine particles having ordinary carrier size. A toner is mixed with said aggregated carrier to prepare a developer.
JP56026073A 1981-02-26 1981-02-26 Developer for electrophotography Pending JPS57141647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56026073A JPS57141647A (en) 1981-02-26 1981-02-26 Developer for electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026073A JPS57141647A (en) 1981-02-26 1981-02-26 Developer for electrophotography

Publications (1)

Publication Number Publication Date
JPS57141647A true JPS57141647A (en) 1982-09-02

Family

ID=12183479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026073A Pending JPS57141647A (en) 1981-02-26 1981-02-26 Developer for electrophotography

Country Status (1)

Country Link
JP (1) JPS57141647A (en)

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