EP0898206A3 - A method for coating carrier particles for use in electrostatic developers - Google Patents

A method for coating carrier particles for use in electrostatic developers Download PDF

Info

Publication number
EP0898206A3
EP0898206A3 EP98202689A EP98202689A EP0898206A3 EP 0898206 A3 EP0898206 A3 EP 0898206A3 EP 98202689 A EP98202689 A EP 98202689A EP 98202689 A EP98202689 A EP 98202689A EP 0898206 A3 EP0898206 A3 EP 0898206A3
Authority
EP
European Patent Office
Prior art keywords
carrier particles
vessel
solvent
coating
coating 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.)
Granted
Application number
EP98202689A
Other languages
German (de)
French (fr)
Other versions
EP0898206A2 (en
EP0898206B1 (en
Inventor
Raphael Voets
Serge C/O Agfa-Gevaert N.V. Tavernier
Gerrit c/o Agfa-Gevaert N.V. Delen
Rainer Bellinghausen
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.)
Xeikon Manufacturing NV
Original Assignee
Agfa Gevaert NV
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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to EP19980202689 priority Critical patent/EP0898206B1/en
Publication of EP0898206A2 publication Critical patent/EP0898206A2/en
Publication of EP0898206A3 publication Critical patent/EP0898206A3/en
Application granted granted Critical
Publication of EP0898206B1 publication Critical patent/EP0898206B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G9/1131—Coating methods; Structure of coatings
    • 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
    • G03G9/1135—Macromolecular components of coatings obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/1136—Macromolecular components of coatings obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon atoms

Abstract

A method for coating carrier particles for use in electrostatic developers is provided comprising the steps of :
  • bringing the carrier particles to be coated in a vessel equipped with means for agitating the carrier particles, so that the carrier particles occupy less than 85 % by volume of the vessel, and the agitation of the carrier particles is described by a Froude number between 0.2 and 20,
  • adding a solution containing between 6 and 60 % by weight with respect to the total volume of the solution of chemical compounds for coating the carrier particles in a solvent with a boiling point of A °C to the vessel at such a rate that, at any time, the solvent is present in an amount lower than 1.25 10-4 ml per cm2 of surface of the carrier particles to be coated ,
  • keeping the carrier particles in the vessel at a temperature of at most (A + 10) °C, and
  • continuously evacuating the solvent.
EP19980202689 1997-08-20 1998-08-08 A method for coating carrier particles for use in electrostatic developers Expired - Lifetime EP0898206B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19980202689 EP0898206B1 (en) 1997-08-20 1998-08-08 A method for coating carrier particles for use in electrostatic developers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97202551 1997-08-20
EP97202551 1997-08-20
EP19980202689 EP0898206B1 (en) 1997-08-20 1998-08-08 A method for coating carrier particles for use in electrostatic developers

Publications (3)

Publication Number Publication Date
EP0898206A2 EP0898206A2 (en) 1999-02-24
EP0898206A3 true EP0898206A3 (en) 1999-03-17
EP0898206B1 EP0898206B1 (en) 2003-02-19

Family

ID=26146795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980202689 Expired - Lifetime EP0898206B1 (en) 1997-08-20 1998-08-08 A method for coating carrier particles for use in electrostatic developers

Country Status (1)

Country Link
EP (1) EP0898206B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6420029B1 (en) 1998-11-26 2002-07-16 Xeikon International Hybrid carrier coating containing a silane network and a polymeric compound not containing silicon atoms
US6551754B2 (en) 2000-04-11 2003-04-22 Xeikon, N.V. Method for coating carrier particles
EP1146398A3 (en) * 2000-04-11 2003-04-09 Xeikon Nv Method for coating carrier particles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507686A (en) * 1967-06-23 1970-04-21 Xerox Corp Method of coating carrier beads
US3947271A (en) * 1972-02-14 1976-03-30 International Business Machines Corporation Electrostatic imaging method using a polytetrafluoroethylene coated carrier particle
GB2014876A (en) * 1978-01-26 1979-09-05 Xerox Corp Coated carrier particles
US5102769A (en) * 1991-02-04 1992-04-07 Xerox Corporation Solution coated carrier particles
US5340677A (en) * 1991-04-26 1994-08-23 Canon Kabushiki Kaisha Carrier for electrophotography, two-component type developer for electrostatic images, process for producing carrier for electrophotography, and image forming method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507686A (en) * 1967-06-23 1970-04-21 Xerox Corp Method of coating carrier beads
US3947271A (en) * 1972-02-14 1976-03-30 International Business Machines Corporation Electrostatic imaging method using a polytetrafluoroethylene coated carrier particle
GB2014876A (en) * 1978-01-26 1979-09-05 Xerox Corp Coated carrier particles
US5102769A (en) * 1991-02-04 1992-04-07 Xerox Corporation Solution coated carrier particles
US5340677A (en) * 1991-04-26 1994-08-23 Canon Kabushiki Kaisha Carrier for electrophotography, two-component type developer for electrostatic images, process for producing carrier for electrophotography, and image forming method

Also Published As

Publication number Publication date
EP0898206A2 (en) 1999-02-24
EP0898206B1 (en) 2003-02-19

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