JPS56125751A - Electrophotographic carrier - Google Patents

Electrophotographic carrier

Info

Publication number
JPS56125751A
JPS56125751A JP2865180A JP2865180A JPS56125751A JP S56125751 A JPS56125751 A JP S56125751A JP 2865180 A JP2865180 A JP 2865180A JP 2865180 A JP2865180 A JP 2865180A JP S56125751 A JPS56125751 A JP S56125751A
Authority
JP
Japan
Prior art keywords
carrier
electric field
resistivity
ground
omega
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
JP2865180A
Other languages
Japanese (ja)
Other versions
JPS6311662B2 (en
Inventor
Eiichi Imai
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 JP2865180A priority Critical patent/JPS56125751A/en
Publication of JPS56125751A publication Critical patent/JPS56125751A/en
Publication of JPS6311662B2 publication Critical patent/JPS6311662B2/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

Landscapes

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

Abstract

PURPOSE:To enable the black ground of a wide area and the black ground of a narrow area to be both developed with good reproducibility by providing the carrier of which the resistivity when a 10V/cm DC electric field is applied to 5-15 timee the resistivity when a 100V/cm DC electric field is applied. CONSTITUTION:The carrier of which the resistivity value when a 10V/cm DC electric field is applied is 10<8>-10<11>OMEGA.cm, the resistivity value when a 100V/cm DC electric field is applied is 10<7>-10<10>OMEGA.cm and the former is 5-15 times the latter is used. Such carrier is obtained by adding reduced iron powder into the water added with, for example, a silane coupling agent and controlled to 4.0pH with an acetic acid, and sticking a cationic conductivity imparting material to the heat- treated iron powder. By the use of the carrier, the formation of blank-out etc. on the black ground of a wide area is eliminated, and the narrow balck ground of characters, line images, etc. is reproduced faithfully to the oringial. In addition, the occurrence of the deterioration of the carrier after copying of multiple sheets is made difficult.
JP2865180A 1980-03-06 1980-03-06 Electrophotographic carrier Granted JPS56125751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2865180A JPS56125751A (en) 1980-03-06 1980-03-06 Electrophotographic carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2865180A JPS56125751A (en) 1980-03-06 1980-03-06 Electrophotographic carrier

Publications (2)

Publication Number Publication Date
JPS56125751A true JPS56125751A (en) 1981-10-02
JPS6311662B2 JPS6311662B2 (en) 1988-03-15

Family

ID=12254408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2865180A Granted JPS56125751A (en) 1980-03-06 1980-03-06 Electrophotographic carrier

Country Status (1)

Country Link
JP (1) JPS56125751A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201064A (en) * 1983-04-28 1984-11-14 Tdk Corp Magnetic carrier particle for electrophotographic development
US4592988A (en) * 1984-08-15 1986-06-03 Halomet, Inc. Ferrite toner carrier core composition derived from fly ash
US4698289A (en) * 1984-08-15 1987-10-06 Halomet Inc. Process for making ferrite spherical particulate toner core from raw fly ash
JPH03119363A (en) * 1989-10-03 1991-05-21 Canon Inc Developer for electrophotography and developing method
US5863684A (en) * 1996-06-07 1999-01-26 Fuji Xerox Co., Ltd. Developer, image forming method, and multicolor image forming method
US6403271B1 (en) 1999-08-24 2002-06-11 Fuji Xerox Co., Ltd. Toner for developing electrostatic latent image, process for producing the same, developer for developing electrostatic latent image, and process for forming image
US6878498B2 (en) 2002-11-12 2005-04-12 Fuji Xerox Co., Ltd. Electrostatic latent image developing toner, its production method, developer, image-forming device and image-forming method
US6929893B2 (en) 2002-09-19 2005-08-16 Fuji Xerox Co., Ltd. Electrostatic image dry toner composition, developer for developing electrostatic latent image and image forming method
US7026085B2 (en) 2003-03-20 2006-04-11 Fuji Xerox Co., Ltd. Dry toner for electrostatic latent image developer, developer and image forming method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03284573A (en) * 1990-03-30 1991-12-16 Juki Corp Paper deformation correcting mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5196330A (en) * 1975-02-21 1976-08-24
JPS52154639A (en) * 1976-06-18 1977-12-22 Ricoh Co Ltd Electrophotographic carrier
JPS54155048A (en) * 1978-05-29 1979-12-06 Ricoh Co Ltd Carrier material for electrophotographic development

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5196330A (en) * 1975-02-21 1976-08-24
JPS52154639A (en) * 1976-06-18 1977-12-22 Ricoh Co Ltd Electrophotographic carrier
JPS54155048A (en) * 1978-05-29 1979-12-06 Ricoh Co Ltd Carrier material for electrophotographic development

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59201064A (en) * 1983-04-28 1984-11-14 Tdk Corp Magnetic carrier particle for electrophotographic development
US4592988A (en) * 1984-08-15 1986-06-03 Halomet, Inc. Ferrite toner carrier core composition derived from fly ash
US4698289A (en) * 1984-08-15 1987-10-06 Halomet Inc. Process for making ferrite spherical particulate toner core from raw fly ash
JPH03119363A (en) * 1989-10-03 1991-05-21 Canon Inc Developer for electrophotography and developing method
US5863684A (en) * 1996-06-07 1999-01-26 Fuji Xerox Co., Ltd. Developer, image forming method, and multicolor image forming method
US6403271B1 (en) 1999-08-24 2002-06-11 Fuji Xerox Co., Ltd. Toner for developing electrostatic latent image, process for producing the same, developer for developing electrostatic latent image, and process for forming image
US6479206B1 (en) 1999-08-24 2002-11-12 Fuji Xerox Co., Ltd. Toner for developing electrostatic latent image, process for producing the same, developer for developing electrostatic latent image, and process for forming image
US6489075B2 (en) 1999-08-24 2002-12-03 Fuji Xerox Co., Ltd. Toner for developing electrostatic latent image, process for producing the same, developer for developing electrostatic latent image, and process for forming image
US6929893B2 (en) 2002-09-19 2005-08-16 Fuji Xerox Co., Ltd. Electrostatic image dry toner composition, developer for developing electrostatic latent image and image forming method
US6878498B2 (en) 2002-11-12 2005-04-12 Fuji Xerox Co., Ltd. Electrostatic latent image developing toner, its production method, developer, image-forming device and image-forming method
US7026085B2 (en) 2003-03-20 2006-04-11 Fuji Xerox Co., Ltd. Dry toner for electrostatic latent image developer, developer and image forming method

Also Published As

Publication number Publication date
JPS6311662B2 (en) 1988-03-15

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