[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

GB1299424A - High resistance carrier particles - Google Patents

High resistance carrier particles

Info

Publication number
GB1299424A
GB1299424A GB684570A GB684570A GB1299424A GB 1299424 A GB1299424 A GB 1299424A GB 684570 A GB684570 A GB 684570A GB 684570 A GB684570 A GB 684570A GB 1299424 A GB1299424 A GB 1299424A
Authority
GB
United Kingdom
Prior art keywords
magnetic
carrier
layers
developer
iron
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
GB684570A
Inventor
Howard Anthony Miller
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 GB1299424A publication Critical patent/GB1299424A/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
    • 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
    • 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
    • G03G9/1137—Macromolecular components of coatings being crosslinked

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1299424 Magnetic carrier EASTMAN KODAK CO 12 Feb 1970 [17 Feb 1969] 6845/70 Heading G2H [Also in Division H1] A developer composition for use on developing electrostatic charge patterns comprises electroscopic toner mixed with carrier particles which comprise a magnetic core coated with at least two continuous, uniform layers of film-forming electrically-insulating resin, the layers being distinct with substantially no dissolution of one into the other. The developer may consist of 90-99% carrier and 1-10% toner by weight. The cores (e.g. 30-1200 microns dia.) may be of Fe, Co, Ni or alloys thereof, ferrites, Iron dispersed on a resin binder or non-magnetic particles coated with ferromagnetic material. The resins (many specified) may be hardenable by light or heat. The carrier particles may have a resistance greater than 10<SP>12</SP> ohms, a magnetic response of at least 65% of that of the core material, and a bulk density at least 80% of that of the core material. In Examples, a black toner comprising a nigrozine colourant and a styrene-based polymer binder is mixed with carriers consisting of iron or iron oxide particles coated with up to 5 layers of polymers. The developer mix is applied by magnetic brush.
GB684570A 1969-02-17 1970-02-12 High resistance carrier particles Expired GB1299424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79996869A 1969-02-17 1969-02-17

Publications (1)

Publication Number Publication Date
GB1299424A true GB1299424A (en) 1972-12-13

Family

ID=25177188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB684570A Expired GB1299424A (en) 1969-02-17 1970-02-12 High resistance carrier particles

Country Status (5)

Country Link
AU (1) AU1145070A (en)
BE (1) BE746111A (en)
DE (1) DE2007004A1 (en)
FR (1) FR2035497A5 (en)
GB (1) GB1299424A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105051B (en) * 1981-07-13 1985-02-27 Konishiroku Photo Ind Electrostatic image developer
DE3427813A1 (en) * 1983-07-29 1985-02-07 Canon K.K., Tokio/Tokyo Development process
JPS6087349A (en) * 1983-10-19 1985-05-17 Canon Inc Toner coating method
JPS60176069A (en) * 1984-02-23 1985-09-10 Konishiroku Photo Ind Co Ltd Developing device

Also Published As

Publication number Publication date
DE2007004A1 (en) 1970-10-29
FR2035497A5 (en) 1970-12-18
AU1145070A (en) 1971-08-19
BE746111A (en) 1970-07-31

Similar Documents

Publication Publication Date Title
JP2612035B2 (en) Electrostatic magnetic carrier particles
JPS59501840A (en) Electrography developer composition and development method
JPS5692545A (en) Electrophotographic developing agent and developing method
JPS5662256A (en) Electrophotographic developer and developing method
EP0186377A1 (en) High quality xerographic imaging with magnetic developer
JPS61151551A (en) Carrier for electrophotographic developer
GB1299424A (en) High resistance carrier particles
US4695524A (en) Process for ultra high quality images with magnetic developer composition
GB1532976A (en) Photoconductive imaging member
JPS6342778B2 (en)
JPH027062B2 (en)
JP2954326B2 (en) Two-component developer carrier
JPS5760340A (en) Development agent for one component electrostatic charge image
JPS5745555A (en) Electric charge type magnetic toner
JPS63228174A (en) Magnetic carrier and its manufacture
JPS565559A (en) Magnetic toner
JPS5764252A (en) Charge type magnetic toner
JP2533007B2 (en) Toner for electrostatic charge development
JPS568153A (en) Electrophotographic developer
JPS5745556A (en) Electric charge type magnetic toner
JP2567748B2 (en) Toner for electrostatic charge development
JPS62291667A (en) Toner
JPS6444455A (en) Magnetic toner
JPS6177868A (en) Developing method of electrostatic latent image
JPS60229034A (en) Developer

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees