GB1355485A - Electrostatographic developer - Google Patents

Electrostatographic developer

Info

Publication number
GB1355485A
GB1355485A GB2675472A GB2675472A GB1355485A GB 1355485 A GB1355485 A GB 1355485A GB 2675472 A GB2675472 A GB 2675472A GB 2675472 A GB2675472 A GB 2675472A GB 1355485 A GB1355485 A GB 1355485A
Authority
GB
United Kingdom
Prior art keywords
particles
conductive
developer
carrier
surface area
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
GB2675472A
Inventor
S W Volkers
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of GB1355485A publication Critical patent/GB1355485A/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
    • G03G9/107—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
    • G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1132—Macromolecular components 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
    • 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
    • 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
    • G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

1355485 Developer XEROX CORP 8 June 1972 [10 June 1971] 26754/72 Heading G2H A developer for electrostatic latent images comprises (a) 0À3 to 5% based on the weight of the developer of resin toner particles having an average particle size of 1 to 30 microns and (b) at least 95% based on the weight of the developer of carrier particles having an average size of 30 to 1000 microns, said carrier particles having electrical conductivity over 10 to 90% of the total carrier surface area, the remaining area being non-conductive. The carrier comprises a mixture of particles having conductive surface area and particles with non-conductive surfaces. The particles having conductive surface area may be partially coated so that each particle has conductive and non-conductive areas. The conductive particles may be of iron, steel, nickel, cobalt, brass, copper, zinc, aluminium or metal oxide. The non-conductive particles may be obtained by coating particles of the above materials with an insulating resin e.g. a terpolymer of styrene, methyl methacrylate and vinyl triethoxysilane. The developer may also comprise a minor proportion of silica hydrogel. The toner particles preferably comprise a styrene-n-butyl acrylate copolymer together with a polyvinyl butyral and carbon black, although other examples are given. Development of an imaged photo-conductive surface with the developer may be by magnetic brush or cascade development. A development electrode is used.
GB2675472A 1971-06-10 1972-06-08 Electrostatographic developer Expired GB1355485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15199671A 1971-06-10 1971-06-10

Publications (1)

Publication Number Publication Date
GB1355485A true GB1355485A (en) 1974-06-05

Family

ID=22541145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2675472A Expired GB1355485A (en) 1971-06-10 1972-06-08 Electrostatographic developer

Country Status (15)

Country Link
JP (1) JPS5314223B1 (en)
AR (1) AR203711A1 (en)
AT (1) AT321715B (en)
AU (1) AU460081B2 (en)
BE (1) BE784451A (en)
BR (1) BR7203719D0 (en)
CA (1) CA984202A (en)
DE (1) DE2227285C3 (en)
ES (1) ES403665A1 (en)
FR (1) FR2141298A5 (en)
GB (1) GB1355485A (en)
IT (1) IT959792B (en)
NL (1) NL7207840A (en)
SE (1) SE375864B (en)
ZA (1) ZA723960B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062445A1 (en) * 1981-03-23 1982-10-13 Mita Industrial Co. Ltd. Method of developing electrostatic images

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018675A1 (en) * 2005-01-20 2006-07-27 Eastman Kodak Co. Toner image developing method, involves transferring toner using toner and carrier particles, where amount of carrier particles exists at its side as mixture of electrically conductive and non-conductive or insulating carrier particles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT453731A (en) * 1948-05-01
US2965573A (en) * 1958-05-02 1960-12-20 Haloid Xerox Inc Xerographic developer
CA565006A (en) * 1954-12-23 1958-10-21 The Battelle Development Corporation Tripartite developer for electrostatic images
DE1522670B2 (en) * 1966-07-02 1977-05-05 Philips Patentverwaltung Gmbh, 2000 Hamburg DEVICE FOR DEVELOPING LATENTAL ELECTROSTATIC CHARGE IMAGES
US3526533A (en) * 1966-08-10 1970-09-01 Xerox Corp Coated carrier particles
US3533835A (en) * 1966-10-11 1970-10-13 Xerox Corp Electrostatographic developer mixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062445A1 (en) * 1981-03-23 1982-10-13 Mita Industrial Co. Ltd. Method of developing electrostatic images

Also Published As

Publication number Publication date
AU460081B2 (en) 1975-03-27
DE2227285C3 (en) 1984-01-19
SE7207388L (en) 1972-12-11
AU4330972A (en) 1973-12-13
DE2227285A1 (en) 1973-01-04
BR7203719D0 (en) 1973-06-05
DE2227285B2 (en) 1978-08-24
AT321715B (en) 1975-04-10
ZA723960B (en) 1973-03-28
FR2141298A5 (en) 1973-01-19
CA984202A (en) 1976-02-24
SE375864B (en) 1975-04-28
BE784451A (en) 1972-12-06
JPS5314223B1 (en) 1978-05-16
ES403665A1 (en) 1975-10-16
NL7207840A (en) 1972-12-12
IT959792B (en) 1973-11-10
AR203711A1 (en) 1975-10-15

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee