JPS57190957A - Electrophotographic developer - Google Patents

Electrophotographic developer

Info

Publication number
JPS57190957A
JPS57190957A JP56075939A JP7593981A JPS57190957A JP S57190957 A JPS57190957 A JP S57190957A JP 56075939 A JP56075939 A JP 56075939A JP 7593981 A JP7593981 A JP 7593981A JP S57190957 A JPS57190957 A JP S57190957A
Authority
JP
Japan
Prior art keywords
carrier
resin
developing
sleeve
ohm
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
JP56075939A
Other languages
Japanese (ja)
Inventor
Yoshisuke Takekida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56075939A priority Critical patent/JPS57190957A/en
Publication of JPS57190957A publication Critical patent/JPS57190957A/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
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/108—Ferrite carrier, e.g. magnetite

Landscapes

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

Abstract

PURPOSE:To execute development having high resolution and good quality, by using a carrier composed of fine particles of insulating resin and >=50wt% magnetic fine particles having 10<6>-10<11>ohm-cm and 45-100mum particle diameter dispersed into said insulating resin particles. CONSTITUTION:A developing apparatus having fixed electrodes and a rotating sleeve is used, a mixture of a carrier having 80mum average particle diameter and 10<7>-10<8>ohm-cm resistivity and an insulating toner is used as a developer, intensity of magnetic poles is set to >=1,000 gauss on the surface of a developing sleeve, and a gap between a photoreceptor and the sleeve is set to 1.5mm.. A high quality image is obtained by developing by these conditions, and the carrier becomes >=300,000 pages/kg in capacity. As the resin of the carrier, polyethylene, epoxy, polystyrene, fluorocarbon resin, etc. are embodied, and as the magnetic material, Fe3O4 or ferrite are usable.
JP56075939A 1981-05-20 1981-05-20 Electrophotographic developer Pending JPS57190957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075939A JPS57190957A (en) 1981-05-20 1981-05-20 Electrophotographic developer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075939A JPS57190957A (en) 1981-05-20 1981-05-20 Electrophotographic developer

Publications (1)

Publication Number Publication Date
JPS57190957A true JPS57190957A (en) 1982-11-24

Family

ID=13590706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075939A Pending JPS57190957A (en) 1981-05-20 1981-05-20 Electrophotographic developer

Country Status (1)

Country Link
JP (1) JPS57190957A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59121077A (en) * 1982-12-28 1984-07-12 Toshiba Corp Electrostatic latent image developing device
JPS6073546A (en) * 1983-09-28 1985-04-25 Matsushita Electric Ind Co Ltd Dry developer
JPS6358360A (en) * 1986-08-29 1988-03-14 Fuji Xerox Co Ltd Carrier for electrophotographic developer
JPS6358361A (en) * 1986-08-29 1988-03-14 Fuji Xerox Co Ltd Carrier for developer
JPS6462667A (en) * 1987-09-03 1989-03-09 Fuji Xerox Co Ltd Developer for electrophotography
US4822708A (en) * 1986-08-01 1989-04-18 Minolta Camera Kabushiki Kaisha Carrier for use in developing device of electrostatic latent image and production thereof
US4822709A (en) * 1986-07-10 1989-04-18 Minolta Camera Kabushiki Kaisha Binder-type carrier suitable for a developing method of electrostatic latent images
US4847176A (en) * 1986-07-10 1989-07-11 Minolta Camera Kabushiki Kaisha Binder-type carrier
US4861693A (en) * 1987-02-20 1989-08-29 Minolta Camera Kabushiki Kaisha Carrier for electrophotography
US4868082A (en) * 1987-01-29 1989-09-19 Minolta Camera Kabushiki Kaisha Binder type carrier
US4971880A (en) * 1988-06-07 1990-11-20 Minolta Camera Kabushiki Kaisha Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization
JPH06324570A (en) * 1993-11-15 1994-11-25 Konica Corp Developing method
WO2004077165A1 (en) * 2003-02-28 2004-09-10 Tomoegawa Paper Co., Ltd. Two-component developer for electrophotography and developing method using same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5468246A (en) * 1977-11-10 1979-06-01 Ricoh Co Ltd Electrostatographic developer
JPS5532073A (en) * 1978-08-28 1980-03-06 Minolta Camera Co Ltd Electrophotographic developing method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5468246A (en) * 1977-11-10 1979-06-01 Ricoh Co Ltd Electrostatographic developer
JPS5532073A (en) * 1978-08-28 1980-03-06 Minolta Camera Co Ltd Electrophotographic developing method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59121077A (en) * 1982-12-28 1984-07-12 Toshiba Corp Electrostatic latent image developing device
JPS6073546A (en) * 1983-09-28 1985-04-25 Matsushita Electric Ind Co Ltd Dry developer
US4847176A (en) * 1986-07-10 1989-07-11 Minolta Camera Kabushiki Kaisha Binder-type carrier
US4822709A (en) * 1986-07-10 1989-04-18 Minolta Camera Kabushiki Kaisha Binder-type carrier suitable for a developing method of electrostatic latent images
US4822708A (en) * 1986-08-01 1989-04-18 Minolta Camera Kabushiki Kaisha Carrier for use in developing device of electrostatic latent image and production thereof
JPS6358361A (en) * 1986-08-29 1988-03-14 Fuji Xerox Co Ltd Carrier for developer
JPS6358360A (en) * 1986-08-29 1988-03-14 Fuji Xerox Co Ltd Carrier for electrophotographic developer
US4868082A (en) * 1987-01-29 1989-09-19 Minolta Camera Kabushiki Kaisha Binder type carrier
US4861693A (en) * 1987-02-20 1989-08-29 Minolta Camera Kabushiki Kaisha Carrier for electrophotography
JPS6462667A (en) * 1987-09-03 1989-03-09 Fuji Xerox Co Ltd Developer for electrophotography
US4971880A (en) * 1988-06-07 1990-11-20 Minolta Camera Kabushiki Kaisha Developer containing halogenated amorphous carbon particles prepared by plasma-polymerization
JPH06324570A (en) * 1993-11-15 1994-11-25 Konica Corp Developing method
WO2004077165A1 (en) * 2003-02-28 2004-09-10 Tomoegawa Paper Co., Ltd. Two-component developer for electrophotography and developing method using same

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