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GB1072478A - Developer mix for developing electrostatic images - Google Patents

Developer mix for developing electrostatic images

Info

Publication number
GB1072478A
GB1072478A GB33681/64A GB3368164A GB1072478A GB 1072478 A GB1072478 A GB 1072478A GB 33681/64 A GB33681/64 A GB 33681/64A GB 3368164 A GB3368164 A GB 3368164A GB 1072478 A GB1072478 A GB 1072478A
Authority
GB
United Kingdom
Prior art keywords
electrostatic images
resins
developing electrostatic
carrier particles
magnetic brush
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.)
Expired
Application number
GB33681/64A
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of GB1072478A publication Critical patent/GB1072478A/en
Expired 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
    • 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
    • G03G9/1075—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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1,72,478. Developers for electrostatic images. ADDRESSOGRAPH-MULTIGRAPH CORPORATION, CHARLES BRUNING DIVISION. Aug. 18, 1964 [Sept.10, 1963], No.33681/64. Heading G2H. A developer for developing electrostatic images by magnetic brush method comprises a granular mass including 1 part electroscopic thermoplastic powder and from 5 to 50 parts of magnetically attractable carrier particles. The carrier particles which may be iron, nickel, cobalt-steel, magnetites or ferrites, each having an irregular shaped body of the order of 3 to 20 microns thick with protrusions which facilitate the formation of a bristlelike magnetic brush. The thermoplastic may be any resin, having resistivity greater than 1 x 10" ohm-cm and a softening point between 50‹C. and 140‹C. Examples are polystyrene , acrylic resins, rosin, asphalt, gilsonites, polyvinyl resins. The resins are pigmented or coloured with carbon black or other dyes or pigments.
GB33681/64A 1963-09-10 1964-08-18 Developer mix for developing electrostatic images Expired GB1072478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US307951A US3278439A (en) 1963-09-10 1963-09-10 Developer mix

Publications (1)

Publication Number Publication Date
GB1072478A true GB1072478A (en) 1967-06-14

Family

ID=23191872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33681/64A Expired GB1072478A (en) 1963-09-10 1964-08-18 Developer mix for developing electrostatic images

Country Status (2)

Country Link
US (1) US3278439A (en)
GB (1) GB1072478A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018601A (en) * 1969-06-19 1977-04-19 Xerox Corporation Electrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickel
US3847604A (en) * 1971-06-10 1974-11-12 Xerox Corp Electrostatic imaging process using nodular carriers
US3767578A (en) * 1971-06-10 1973-10-23 Xerox Corp Carrier material for electrostatographic developer
NL7207688A (en) * 1972-06-07 1973-12-11 Oce Van Der Grinten Nv
US4031021A (en) * 1974-03-25 1977-06-21 Deming Philip H Magnetic toner compositions
US4126454A (en) * 1974-05-30 1978-11-21 Xerox Corporation Imaging process utilizing classified high surface area carrier materials
JPS5913027B2 (en) * 1975-11-26 1984-03-27 株式会社リコー Fukushimai Fukushiyahouhou
US4345013A (en) * 1977-02-28 1982-08-17 Black Copy Company, Inc. Dual purpose magnetic toner
US4288519A (en) * 1977-02-28 1981-09-08 Black Copy Company, Inc. Dual purpose electrophotographic magnetic toner and process of making
JPS5913732B2 (en) * 1977-07-05 1984-03-31 コニカ株式会社 Iron powder development carrier and its manufacturing method, developer and image forming method
US5192638A (en) * 1984-12-10 1993-03-09 Spectrum Sciences B.V. Toner for use in compositions for developing latent electrostatic images, method of making the same, and liquid composition using the improved toner
US4794651A (en) * 1984-12-10 1988-12-27 Savin Corporation Toner for use in compositions for developing latent electrostatic images, method of making the same, and liquid composition using the improved toner
JP3812955B2 (en) * 1993-08-24 2006-08-23 株式会社Ｎｅｏｍａｘ Carrier for developer and image forming method using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456313A (en) * 1944-02-16 1948-12-14 Du Pont Pigment compositions
US2618551A (en) * 1948-10-20 1952-11-18 Haloid Co Developer for electrostatic images
US2874063A (en) * 1953-03-23 1959-02-17 Rca Corp Electrostatic printing
US2846333A (en) * 1955-11-01 1958-08-05 Haloid Xerox Inc Method of developing electrostatic images

Also Published As

Publication number Publication date
US3278439A (en) 1966-10-11

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