EP0427199A3 - Two-component magnetic developer for magnetic image character recognition - Google Patents

Two-component magnetic developer for magnetic image character recognition Download PDF

Info

Publication number
EP0427199A3
EP0427199A3 EP19900121213 EP90121213A EP0427199A3 EP 0427199 A3 EP0427199 A3 EP 0427199A3 EP 19900121213 EP19900121213 EP 19900121213 EP 90121213 A EP90121213 A EP 90121213A EP 0427199 A3 EP0427199 A3 EP 0427199A3
Authority
EP
European Patent Office
Prior art keywords
magnetic
character recognition
image character
developer
component
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Withdrawn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
EP19900121213
Other versions
EP0427199A2 (en
Inventor
John M. C/O Eastman Kodak Company Spence
Robert E. C/O Eastman Kodak Company Contois
Lawrence P. C/O Eastman Kodak Company Demejo
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
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0427199A2 publication Critical patent/EP0427199A2/en
Publication of EP0427199A3 publication Critical patent/EP0427199A3/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Withdrawn legal-status Critical Current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
    • G03G9/087—Binders for toner particles
    • G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/08706—Polymers of alkenyl-aromatic compounds
    • G03G9/08708—Copolymers of styrene
    • 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
    • G03G9/1087—Specified elemental magnetic metal or alloy, e.g. alnico comprising iron, nickel, cobalt, and aluminum, or permalloy comprising iron and nickel
    • 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
    • G03G9/087—Binders for toner particles
    • G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/08706—Polymers of alkenyl-aromatic compounds
    • G03G9/08708—Copolymers of styrene
    • G03G9/08711—Copolymers of styrene with esters of acrylic or methacrylic acid
    • 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
    • G03G9/087—Binders for toner particles
    • G03G9/08702—Binders for toner particles comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/08737—Polymers derived from conjugated dienes
    • 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
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/0602—Developer
    • G03G2215/0604—Developer solid type
    • G03G2215/0607—Developer solid type two-component
    • G03G2215/0609—Developer solid type two-component magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)
EP19900121213 1989-11-08 1990-11-06 Two-component magnetic developer for magnetic image character recognition Withdrawn EP0427199A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43324889A 1989-11-08 1989-11-08
US433248 1989-11-08

Publications (2)

Publication Number Publication Date
EP0427199A2 EP0427199A2 (en) 1991-05-15
EP0427199A3 true EP0427199A3 (en) 1991-06-05

Family

ID=23719423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900121213 Withdrawn EP0427199A3 (en) 1989-11-08 1990-11-06 Two-component magnetic developer for magnetic image character recognition

Country Status (2)

Country Link
EP (1) EP0427199A3 (en)
JP (1) JPH03174545A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69128262T2 (en) * 1990-07-27 1998-04-16 Canon Kk Magnetic developer, electrophotographic apparatus and method for recognizing characters from magnetic ink
US5667924A (en) * 1996-02-14 1997-09-16 Xerox Corporation Superparamagnetic image character recognition compositions and processes of making and using

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2007003A1 (en) * 1969-02-17 1970-08-20 Eastman Kodak Company, Rochester, N.Y. (V.St.A.) Process for the production of magnetically responsive carrier particles
GB2054883A (en) * 1979-06-29 1981-02-18 Eastman Kodak Co Electrographic carrier particles
EP0060703A1 (en) * 1981-03-13 1982-09-22 Xerox Corporation Electrostatographic developer composition and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6338961A (en) * 1986-08-05 1988-02-19 Toray Ind Inc Two-component developer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2007003A1 (en) * 1969-02-17 1970-08-20 Eastman Kodak Company, Rochester, N.Y. (V.St.A.) Process for the production of magnetically responsive carrier particles
GB2054883A (en) * 1979-06-29 1981-02-18 Eastman Kodak Co Electrographic carrier particles
EP0060703A1 (en) * 1981-03-13 1982-09-22 Xerox Corporation Electrostatographic developer composition and method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 249 (P-730)(3096) 14 July 1988, & JP-A-63 38961 (TORAY IND. INC.) 19 February 1988, *
RESEARCH DISCLOSURE November 1979, no.187, page 612, ref.no.18727 Disclosed anonymously:"Electrographic magnetic carrier particles" *

Also Published As

Publication number Publication date
JPH03174545A (en) 1991-07-29
EP0427199A2 (en) 1991-05-15

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