EP1156375A3 - Method for using hard magnetic carriers in an electrographic process - Google Patents

Method for using hard magnetic carriers in an electrographic process Download PDF

Info

Publication number
EP1156375A3
EP1156375A3 EP01111258A EP01111258A EP1156375A3 EP 1156375 A3 EP1156375 A3 EP 1156375A3 EP 01111258 A EP01111258 A EP 01111258A EP 01111258 A EP01111258 A EP 01111258A EP 1156375 A3 EP1156375 A3 EP 1156375A3
Authority
EP
European Patent Office
Prior art keywords
hard magnetic
carrier
development
ohm
methods
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.)
Withdrawn
Application number
EP01111258A
Other languages
German (de)
French (fr)
Other versions
EP1156375A2 (en
Inventor
Peter Steven Alexandrovich
Wilhelm K. Göbel
Patrick Lambert
Eric C. Stelter
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.)
Eastman Kodak Co
Original Assignee
Heidelberger Druckmaschinen AG
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
Priority claimed from US09/572,988 external-priority patent/US6232026B1/en
Priority claimed from US09/572,989 external-priority patent/US6228549B1/en
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1156375A2 publication Critical patent/EP1156375A2/en
Publication of EP1156375A3 publication Critical patent/EP1156375A3/en
Withdrawn legal-status Critical Current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
    • G03G9/1075—Structural characteristics of the carrier particles, e.g. shape or crystallographic structure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G03G13/08—Developing using a solid developer, e.g. powder developer
    • G03G13/09—Developing using a solid developer, e.g. powder developer using magnetic brush
    • 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
    • G03G9/1085—Ferrite carrier, e.g. magnetite with non-ferrous metal oxide, e.g. MgO-Fe2O3
    • 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
    • G03G9/1088—Binder-type carrier
    • 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

Abstract

Methods for development of an electrostatic image are disclosed that utilize developer compositions with hard magnetic carrier compositions which can provide improved development efficiencies and reduced amounts of image carrier pick-up. The methods utilize hard magnetic carrier particles that are modified to have specific levels of resistivit, such as, for example, of from about 1x105 ohm-cm to about 1x1010 ohm-cm, and a carrier charge-to-mass of greater than about 1.0 µC/g, which carriers can provide greater development speeds without unacceptable levels of image carrier pick-up. In embodiments, the hard magnetic materials are doped, i.e., bulk substituted, with multi-valent metals to adjust resistivity, while in other embodiments, the hard magnetic materials are coated with at least one multi-valent metal oxide.
EP01111258A 2000-05-17 2001-05-16 Method for using hard magnetic carriers in an electrographic process Withdrawn EP1156375A3 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US204941 1994-03-02
US20494100P 2000-05-17 2000-05-17
US572989 2000-05-17
US572988 2000-05-17
US09/572,988 US6232026B1 (en) 2000-05-17 2000-05-17 Magnetic carrier particles
US09/572,989 US6228549B1 (en) 2000-05-17 2000-05-17 Magnetic carrier particles

Publications (2)

Publication Number Publication Date
EP1156375A2 EP1156375A2 (en) 2001-11-21
EP1156375A3 true EP1156375A3 (en) 2002-08-21

Family

ID=27394727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111258A Withdrawn EP1156375A3 (en) 2000-05-17 2001-05-16 Method for using hard magnetic carriers in an electrographic process

Country Status (5)

Country Link
EP (1) EP1156375A3 (en)
JP (1) JP2003533745A (en)
AU (1) AU2001259764A1 (en)
CA (1) CA2375345A1 (en)
WO (1) WO2001088623A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109626984A (en) * 2019-01-30 2019-04-16 浙江大学 A kind of high dielectric of existing fringing field is adjustable zirconium doping barium ferrite and preparation method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6121675B2 (en) * 2012-09-27 2017-04-26 Ｄｏｗａエレクトロニクス株式会社 Sintered particles, electrophotographic developer carrier, electrophotographic developer using the same, and method for producing sintered particles
JP6569173B2 (en) * 2015-01-28 2019-09-04 パウダーテック株式会社 Ferrite particles with outer shell structure
WO2017175646A1 (en) * 2016-04-05 2017-10-12 パウダーテック株式会社 Ferrite carrier core material for electrophotographic developer, ferrite carrier for electrophotographic developer, electrophotographic developer, and method for producing ferrite carrier core material for electrophotographic developer

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394429A (en) * 1980-06-02 1983-07-19 Xerox Corporation Development process and apparatus
US4623603A (en) * 1982-04-07 1986-11-18 Hitachi Metals, Ltd. Spherical electrophotographic magnetoplumbite-type hexagonal ferrite carrier powder
EP0296072A2 (en) * 1987-06-15 1988-12-21 EASTMAN KODAK COMPANY (a New Jersey corporation) Electrostatic magnetic carrier particles
US4855205A (en) * 1988-08-05 1989-08-08 Eastman Kodak Company Interdispersed two-phase ferrite composite and carrier therefrom
EP0353630A2 (en) * 1988-08-05 1990-02-07 Eastman Kodak Company Rare earth-containing magnetic carrier particles
WO1991015811A1 (en) * 1990-04-05 1991-10-17 Eastman Kodak Company Glass composite magnetic carrier particles
EP0547620A1 (en) * 1991-12-19 1993-06-23 Eastman Kodak Company Two-phase ferroelectric-ferromagnetic composite and carrier therefrom
WO1993012470A1 (en) * 1991-12-12 1993-06-24 Basf Aktiengesellschaft Particles suitable for use as carrier particles in electrophotography
EP0580135A1 (en) * 1992-07-22 1994-01-26 Canon Kabushiki Kaisha Carrier for use in electrophotography, two component-type developer and image forming method
EP0668542A2 (en) * 1994-02-07 1995-08-23 Basf Aktiengesellschaft Metaloxide- and metalcoated carrier for electrophotography
EP0708379A2 (en) * 1994-10-05 1996-04-24 Toda Kogyo Corp. Magnetic carrier for electrophotography
US5948585A (en) * 1998-07-16 1999-09-07 Eastman Kodak Company Optimized particulate surface treatment concentration for electrostatographic images produced in an electrostatographic engine that includes a compliant intermediate transfer member
US5998076A (en) * 1998-03-09 1999-12-07 Xerox Corporation Carrier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5989767A (en) * 1998-12-15 1999-11-23 Eastman Kodak Company Carrier particles for electrostatographic developers

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394429A (en) * 1980-06-02 1983-07-19 Xerox Corporation Development process and apparatus
US4623603A (en) * 1982-04-07 1986-11-18 Hitachi Metals, Ltd. Spherical electrophotographic magnetoplumbite-type hexagonal ferrite carrier powder
EP0296072A2 (en) * 1987-06-15 1988-12-21 EASTMAN KODAK COMPANY (a New Jersey corporation) Electrostatic magnetic carrier particles
US4855205A (en) * 1988-08-05 1989-08-08 Eastman Kodak Company Interdispersed two-phase ferrite composite and carrier therefrom
EP0353630A2 (en) * 1988-08-05 1990-02-07 Eastman Kodak Company Rare earth-containing magnetic carrier particles
WO1991015811A1 (en) * 1990-04-05 1991-10-17 Eastman Kodak Company Glass composite magnetic carrier particles
WO1993012470A1 (en) * 1991-12-12 1993-06-24 Basf Aktiengesellschaft Particles suitable for use as carrier particles in electrophotography
EP0547620A1 (en) * 1991-12-19 1993-06-23 Eastman Kodak Company Two-phase ferroelectric-ferromagnetic composite and carrier therefrom
EP0580135A1 (en) * 1992-07-22 1994-01-26 Canon Kabushiki Kaisha Carrier for use in electrophotography, two component-type developer and image forming method
EP0668542A2 (en) * 1994-02-07 1995-08-23 Basf Aktiengesellschaft Metaloxide- and metalcoated carrier for electrophotography
EP0708379A2 (en) * 1994-10-05 1996-04-24 Toda Kogyo Corp. Magnetic carrier for electrophotography
US5998076A (en) * 1998-03-09 1999-12-07 Xerox Corporation Carrier
US5948585A (en) * 1998-07-16 1999-09-07 Eastman Kodak Company Optimized particulate surface treatment concentration for electrostatographic images produced in an electrostatographic engine that includes a compliant intermediate transfer member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109626984A (en) * 2019-01-30 2019-04-16 浙江大学 A kind of high dielectric of existing fringing field is adjustable zirconium doping barium ferrite and preparation method thereof

Also Published As

Publication number Publication date
AU2001259764A1 (en) 2001-11-26
EP1156375A2 (en) 2001-11-21
CA2375345A1 (en) 2001-11-22
JP2003533745A (en) 2003-11-11
WO2001088623A1 (en) 2001-11-22

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