CA2363468A1 - Development systems for magnetic toners and toners having reduced magnetic loadings - Google Patents

Development systems for magnetic toners and toners having reduced magnetic loadings Download PDF

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Publication number
CA2363468A1
CA2363468A1 CA002363468A CA2363468A CA2363468A1 CA 2363468 A1 CA2363468 A1 CA 2363468A1 CA 002363468 A CA002363468 A CA 002363468A CA 2363468 A CA2363468 A CA 2363468A CA 2363468 A1 CA2363468 A1 CA 2363468A1
Authority
CA
Canada
Prior art keywords
magnetic
developer
toners
development
development system
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
CA002363468A
Other languages
French (fr)
Other versions
CA2363468C (en
Inventor
Thomas A. Jadwin
John F. Crichton
Robert D. Fields
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
Individual
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 Individual filed Critical Individual
Publication of CA2363468A1 publication Critical patent/CA2363468A1/en
Application granted granted Critical
Publication of CA2363468C publication Critical patent/CA2363468C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y15/00—Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
    • 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
    • G03G9/083—Magnetic toner particles
    • 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
    • G03G9/097—Plasticisers; Charge controlling agents
    • 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
    • G03G9/097—Plasticisers; Charge controlling agents
    • G03G9/09708—Inorganic compounds
    • 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
    • G03G9/097—Plasticisers; Charge controlling agents
    • G03G9/09733—Organic compounds
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00025—Machine control, e.g. regulating different parts of the machine
    • G03G2215/0013—Machine control, e.g. regulating different parts of the machine for producing copies with MICR

Abstract

Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in developer for magnetic ink character recognition printing. With respect to the development system, a development system is disclosed which includes a supply of dry developer mixture which contains magnetic toner particles and hard magnetic carrier particles. The development system further includes a non-magnetic, cylindrical shell for transporting the developer between the supply and the development zone, wherein the shell can be rotatable or stationary. A
rotating magnetic core of a pre-selected magnetic field strength and means for rotating at least the magnetic core to provide for the transport of the toner particles from the shell to an electrostatic image also provided as part of the development system. A method for developing electrostatic image with magnetic toner is further disclosed, for example, involving the above-described development system.
Magnetic toner particles having a low magnetic loading such as on the order of 28% by weight or less, based on the weight of the toner are further described wherein these magnetic toners can include a spacing agent on the surface of the magnetic toner particles. A
developer is further disclosed which contains the magnetic toner particles of the present invention with hard magnetic carrier particles. Other developer compositions are also described.
CA002363468A 2000-12-26 2001-11-15 Development systems for magnetic toners and toners having reduced magnetic loadings Expired - Fee Related CA2363468C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/747,764 US6610451B2 (en) 2000-12-26 2000-12-26 Development systems for magnetic toners having reduced magnetic loadings
US09/747,764 2000-12-26

Publications (2)

Publication Number Publication Date
CA2363468A1 true CA2363468A1 (en) 2002-06-26
CA2363468C CA2363468C (en) 2005-01-25

Family

ID=25006528

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002363468A Expired - Fee Related CA2363468C (en) 2000-12-26 2001-11-15 Development systems for magnetic toners and toners having reduced magnetic loadings

Country Status (5)

Country Link
US (3) US6610451B2 (en)
EP (1) EP1220044B1 (en)
JP (1) JP2002304057A (en)
CA (1) CA2363468C (en)
DE (1) DE60138750D1 (en)

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US6728503B2 (en) 2001-02-28 2004-04-27 Heidelberger Druckmaschinen Ag Electrophotographic image developing process with optimized average developer bulk velocity
US6797448B2 (en) * 2001-05-14 2004-09-28 Eastman Kodak Company Electrophotographic toner and development process with improved image and fusing quality
JP2004252402A (en) * 2002-06-24 2004-09-09 Heidelberger Druckmas Ag Electrophotographic toner and development process using chemically prepared toner
US6909856B2 (en) * 2002-10-01 2005-06-21 Eastman Kodak Company Functionality switching for MICR printing
US20040179867A1 (en) * 2003-03-11 2004-09-16 Crichton John F. Method and apparatus for improved printing with toner having magnetic content
US7157202B1 (en) 2003-09-23 2007-01-02 Eastman Kodak Company Method and apparatus for reducing densification of multiple component electrographic developer
US7248823B2 (en) * 2003-09-26 2007-07-24 Eastman Kodak Company Electrographic ribbon and method implementing a skive
US20050271961A1 (en) * 2004-03-05 2005-12-08 Jadwin Thomas A Substrate and near infrared absorbing toner
US20050220518A1 (en) * 2004-03-31 2005-10-06 Eastman Kodak Company Treatment of preprinted media for improved toner adhesion
US7208252B2 (en) * 2004-06-30 2007-04-24 Xerox Corporation Magnetic toner and conductive developer compositions
US20060230273A1 (en) * 2005-04-08 2006-10-12 Eastman Kodak Company Hidden MIRC printing for security
US7666562B2 (en) * 2006-02-23 2010-02-23 Lexmark International, Inc. Image forming media containing reflecting pigment
US8101326B2 (en) 2006-05-19 2012-01-24 Eastman Kodak Company Secure document printing method and system
US20070268511A1 (en) * 2006-05-19 2007-11-22 Eastman Kodak Company Secure document printing
US20090238616A1 (en) * 2008-03-19 2009-09-24 Andrew Ciaschi Ultra-low color density print finishing system with high gloss for image highlighting
US8092970B2 (en) * 2008-05-15 2012-01-10 Eastman Kodak Company Adjustable gloss document printing
US8236192B2 (en) * 2008-06-26 2012-08-07 Xerox Corporation Ferromagnetic nanoparticles with high magnetocrystalline anisotropy for MICR ink applications
US8137879B2 (en) * 2008-06-26 2012-03-20 Xerox Corporation Ferromagnetic nanoparticles with high magnetocrystalline anisotropy for MICR toner applications

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Also Published As

Publication number Publication date
US20030190541A1 (en) 2003-10-09
EP1220044A3 (en) 2005-11-16
JP2002304057A (en) 2002-10-18
US7033720B2 (en) 2006-04-25
US20020115006A1 (en) 2002-08-22
CA2363468C (en) 2005-01-25
DE60138750D1 (en) 2009-07-02
EP1220044A2 (en) 2002-07-03
US6610451B2 (en) 2003-08-26
US6766136B2 (en) 2004-07-20
US20040219447A1 (en) 2004-11-04
EP1220044B1 (en) 2009-05-20

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Effective date: 20131115