JPS54155048A - Carrier material for electrophotographic development - Google Patents
Carrier material for electrophotographic developmentInfo
- Publication number
- JPS54155048A JPS54155048A JP6331278A JP6331278A JPS54155048A JP S54155048 A JPS54155048 A JP S54155048A JP 6331278 A JP6331278 A JP 6331278A JP 6331278 A JP6331278 A JP 6331278A JP S54155048 A JPS54155048 A JP S54155048A
- Authority
- JP
- Japan
- Prior art keywords
- fluoropolymer
- conductive
- gray
- pigment
- particles
- 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
Links
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
PURPOSE: To reduce toner accumulation on the surfaces of carrier particles and to strengthen the mechanical strength of the particles by coating the surface of core material with gray composition containing fluoropolymer and special pigment.
CONSTITUTION: 5W80 by weight of percent of a mixture containing black fine particles such as carbon black and white fine particles such as TiO2, one of which is at least conductive, or gray conductive pigment such as Zn powder exhibiting solely conductive is uniformly mixed with fluoropolymer in aqueous dispersion of the fluoropolymer such as polytetrafluorethylene. A gray coated layer is formed on the surface of a core material in thickness of preferably 0.2W5μ using this suspension liquid. Thus. there is provided an image of superior gradation reproducibility, stabilized powder characteristics and frictional charging characteristics under wide temperature and moisture conditions and reduced edge effect due to conductivity of filler pigment.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6331278A JPS54155048A (en) | 1978-05-29 | 1978-05-29 | Carrier material for electrophotographic development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6331278A JPS54155048A (en) | 1978-05-29 | 1978-05-29 | Carrier material for electrophotographic development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54155048A true JPS54155048A (en) | 1979-12-06 |
Family
ID=13225630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6331278A Pending JPS54155048A (en) | 1978-05-29 | 1978-05-29 | Carrier material for electrophotographic development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54155048A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125751A (en) * | 1980-03-06 | 1981-10-02 | Canon Inc | Electrophotographic carrier |
| JPS5957250A (en) * | 1982-09-27 | 1984-04-02 | Fujitsu Ltd | Magnetic brush developer for laser printer |
| JPS59128557A (en) * | 1983-01-14 | 1984-07-24 | Fujitsu Ltd | Powdered developer used for laser printer |
| JPS60159753A (en) * | 1984-01-31 | 1985-08-21 | Ricoh Co Ltd | Carrier for developing electrostatic latent image |
| JPH01101560A (en) * | 1987-10-14 | 1989-04-19 | Ricoh Co Ltd | Carrier for two-component type dry developer |
| JPH09152749A (en) * | 1995-11-29 | 1997-06-10 | Fuji Xerox Co Ltd | Carrier for electrostatic latent image developer, electrostatic latent image developer and image forming method |
| US6500595B1 (en) | 1999-10-20 | 2002-12-31 | Ricoh Company, Ltd. | Carrier for electrophotographic developer, method for manufacturing the carrier, and coating liquid for the method |
| US6904244B2 (en) | 2001-11-26 | 2005-06-07 | Ricoh Company, Ltd | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
| US7020421B2 (en) | 2002-12-27 | 2006-03-28 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
| US7226713B2 (en) | 2003-01-31 | 2007-06-05 | Ricoh Company, Ltd. | Carrier, developer including the carrier and image forming apparatus using the developer |
| US7381513B2 (en) | 2004-07-29 | 2008-06-03 | Ricoh Company, Ltd. | Carrier, developer, image forming method and process cartridge for electrostatic image development |
| US7384719B2 (en) | 2004-03-02 | 2008-06-10 | Ricoh Company Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
| EP1965261A2 (en) | 2007-03-02 | 2008-09-03 | Ricoh Company, Ltd. | Toner for developing electrostatic image, method for producing the toner, image forming method, image forming apparatus and process cartridge using the toner |
| US7527908B2 (en) | 2005-04-06 | 2009-05-05 | Ricoh Company, Ltd. | Carrier, developer, developer container, image forming method and process cartridge |
| US7553598B2 (en) | 2005-03-18 | 2009-06-30 | Ricoh Company, Limited | Electrophotographic carrier, developer, developer container, process cartridge, image forming apparatus and image forming method |
| EP2090934A1 (en) | 2008-02-13 | 2009-08-19 | Ricoh Company, Ltd. | Carrier, two-component developer containing carrier and toner, and image forming method |
| US7592116B2 (en) | 2004-11-12 | 2009-09-22 | Ricoh Company, Ltd. | Indium-containing carrier for electrophotography, developer using the same, and developer container |
| US8247149B2 (en) | 2007-12-03 | 2012-08-21 | Ricoh Company, Ltd. | Electrophotographic developer carrier, electrophotographic developer, image forming method, process cartridge and image forming apparatus |
| US8247150B2 (en) | 2008-09-17 | 2012-08-21 | Ricoh Company, Ltd. | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method |
| US8263302B2 (en) | 2008-09-11 | 2012-09-11 | Ricoh Company, Ltd. | Carrier for electrophotography and two-component developer |
| US8512929B2 (en) | 2009-09-14 | 2013-08-20 | Ricoh Company, Ltd. | Latent electrostatic image developing carrier, two-component developer and image forming method |
| US10025214B2 (en) | 2015-12-28 | 2018-07-17 | Ricoh Company, Ltd. | Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge |
| US10444651B2 (en) | 2017-03-17 | 2019-10-15 | Ricoh Company, Ltd. | Carrier, developer, supplemental developer, image forming apparatus, image forming method, and process cartridge |
| WO2021094957A1 (en) | 2019-11-15 | 2021-05-20 | Ricoh Company, Ltd. | Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge |
| US11106150B2 (en) | 2018-11-22 | 2021-08-31 | Ricoh Company, Ltd. | Carrier, developer, method, and apparatus for forming electrophotographic image, and process cartridge |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536535A (en) * | 1976-07-08 | 1978-01-21 | Matsushita Electric Ind Co Ltd | Television projector |
-
1978
- 1978-05-29 JP JP6331278A patent/JPS54155048A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536535A (en) * | 1976-07-08 | 1978-01-21 | Matsushita Electric Ind Co Ltd | Television projector |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125751A (en) * | 1980-03-06 | 1981-10-02 | Canon Inc | Electrophotographic carrier |
| JPS6311662B2 (en) * | 1980-03-06 | 1988-03-15 | Canon Kk | |
| JPS5957250A (en) * | 1982-09-27 | 1984-04-02 | Fujitsu Ltd | Magnetic brush developer for laser printer |
| JPS6246856B2 (en) * | 1982-09-27 | 1987-10-05 | Fujitsu Ltd | |
| JPS6355060B2 (en) * | 1983-01-14 | 1988-11-01 | Fujitsu Ltd | |
| JPS59128557A (en) * | 1983-01-14 | 1984-07-24 | Fujitsu Ltd | Powdered developer used for laser printer |
| JPS60159753A (en) * | 1984-01-31 | 1985-08-21 | Ricoh Co Ltd | Carrier for developing electrostatic latent image |
| JPH01101560A (en) * | 1987-10-14 | 1989-04-19 | Ricoh Co Ltd | Carrier for two-component type dry developer |
| JPH09152749A (en) * | 1995-11-29 | 1997-06-10 | Fuji Xerox Co Ltd | Carrier for electrostatic latent image developer, electrostatic latent image developer and image forming method |
| US6500595B1 (en) | 1999-10-20 | 2002-12-31 | Ricoh Company, Ltd. | Carrier for electrophotographic developer, method for manufacturing the carrier, and coating liquid for the method |
| US6904244B2 (en) | 2001-11-26 | 2005-06-07 | Ricoh Company, Ltd | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
| US7003235B2 (en) | 2001-11-26 | 2006-02-21 | Ricoh Company, Ltd. | Developing device for suppressing variations in bulk density of developer, and an image forming apparatus including the developing device |
| US7020421B2 (en) | 2002-12-27 | 2006-03-28 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
| US7474867B2 (en) | 2002-12-27 | 2009-01-06 | Ricoh Company, Ltd. | Magnetic carrier, two-component developer, development method, development device and image forming apparatus of electrophotography |
| US7272347B2 (en) | 2003-01-31 | 2007-09-18 | Ricoh Company, Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
| US7226713B2 (en) | 2003-01-31 | 2007-06-05 | Ricoh Company, Ltd. | Carrier, developer including the carrier and image forming apparatus using the developer |
| US7384719B2 (en) | 2004-03-02 | 2008-06-10 | Ricoh Company Ltd. | Carrier, developer including the carrier, and image forming apparatus using the developer |
| US7381513B2 (en) | 2004-07-29 | 2008-06-03 | Ricoh Company, Ltd. | Carrier, developer, image forming method and process cartridge for electrostatic image development |
| US7592116B2 (en) | 2004-11-12 | 2009-09-22 | Ricoh Company, Ltd. | Indium-containing carrier for electrophotography, developer using the same, and developer container |
| US7553598B2 (en) | 2005-03-18 | 2009-06-30 | Ricoh Company, Limited | Electrophotographic carrier, developer, developer container, process cartridge, image forming apparatus and image forming method |
| US7527908B2 (en) | 2005-04-06 | 2009-05-05 | Ricoh Company, Ltd. | Carrier, developer, developer container, image forming method and process cartridge |
| EP1965261A2 (en) | 2007-03-02 | 2008-09-03 | Ricoh Company, Ltd. | Toner for developing electrostatic image, method for producing the toner, image forming method, image forming apparatus and process cartridge using the toner |
| US8247149B2 (en) | 2007-12-03 | 2012-08-21 | Ricoh Company, Ltd. | Electrophotographic developer carrier, electrophotographic developer, image forming method, process cartridge and image forming apparatus |
| EP2090934A1 (en) | 2008-02-13 | 2009-08-19 | Ricoh Company, Ltd. | Carrier, two-component developer containing carrier and toner, and image forming method |
| US8263302B2 (en) | 2008-09-11 | 2012-09-11 | Ricoh Company, Ltd. | Carrier for electrophotography and two-component developer |
| US8247150B2 (en) | 2008-09-17 | 2012-08-21 | Ricoh Company, Ltd. | Carrier for developing electrostatic latent image, two-component developer, supplemental developer, process cartridge, and image forming method |
| US8512929B2 (en) | 2009-09-14 | 2013-08-20 | Ricoh Company, Ltd. | Latent electrostatic image developing carrier, two-component developer and image forming method |
| US10025214B2 (en) | 2015-12-28 | 2018-07-17 | Ricoh Company, Ltd. | Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge |
| US10444651B2 (en) | 2017-03-17 | 2019-10-15 | Ricoh Company, Ltd. | Carrier, developer, supplemental developer, image forming apparatus, image forming method, and process cartridge |
| US11106150B2 (en) | 2018-11-22 | 2021-08-31 | Ricoh Company, Ltd. | Carrier, developer, method, and apparatus for forming electrophotographic image, and process cartridge |
| WO2021094957A1 (en) | 2019-11-15 | 2021-05-20 | Ricoh Company, Ltd. | Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge |
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