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GB1498352A - Production of dry copier toner carrier particles - Google Patents

Production of dry copier toner carrier particles

Info

Publication number
GB1498352A
GB1498352A GB15057/76A GB1505776A GB1498352A GB 1498352 A GB1498352 A GB 1498352A GB 15057/76 A GB15057/76 A GB 15057/76A GB 1505776 A GB1505776 A GB 1505776A GB 1498352 A GB1498352 A GB 1498352A
Authority
GB
United Kingdom
Prior art keywords
particles
iron
drum
separator
carrier particles
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
GB15057/76A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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
Priority claimed from DE19752516170 external-priority patent/DE2516170A1/en
Priority claimed from DE19752526757 external-priority patent/DE2526757A1/en
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of GB1498352A publication Critical patent/GB1498352A/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
    • G03G9/1087—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)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1498352 Carrier particles for electrostatic developers HOECHST AG 13 April 1976 [14 April 1975 14 June 1975] 15057/76 Heading G2H [Also in Division B2] Toner carrier particles for a dry copying process are produced by using a magnetic drum separator to separate iron or iron alloy powder particles having a grain size of 10 to 250 Ám from a mixture with particles having magnetic permeabilities less than half that of iron. The separator is of the type having a rotating drum housing a stationary magnet which is adjustable in angular separation from the entry point of the mixture in the range 20 degrees to 50 degrees and the surface acceleration of the drum is from 15 to 60 m/sec<SP>2</SP>. The powder is fed to the separator at a rate less than a tenth of that necessary to form a single particle layer over the cylindrical surface of the drum. After separation the iron particles are demagnetized. The particles can be iron alloy including, by weight, 0À1% to 18% Si, from 0À05% to 0À85% C, from 0À1% to 2% Mn, from 0À01% to 0À2% A1, from 0À01% to 0À15% P, and from 0À01% to 0À05% S.
GB15057/76A 1975-04-14 1976-04-13 Production of dry copier toner carrier particles Expired GB1498352A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19752516170 DE2516170A1 (en) 1975-04-14 1975-04-14 Toner carriers mfr. for dry copiers - by magnetic sepn. of impurities from iron particles
DE19752526757 DE2526757A1 (en) 1975-06-14 1975-06-14 Toner carriers mfr. for dry copiers - by magnetic sepn. of impurities from iron particles

Publications (1)

Publication Number Publication Date
GB1498352A true GB1498352A (en) 1978-01-18

Family

ID=25768758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15057/76A Expired GB1498352A (en) 1975-04-14 1976-04-13 Production of dry copier toner carrier particles

Country Status (4)

Country Link
JP (1) JPS51127735A (en)
FR (1) FR2308131A1 (en)
GB (1) GB1498352A (en)
NL (1) NL7603978A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187117B (en) * 1986-02-28 1990-10-24 De Beers Ind Diamond Method and apparatus for separating particles into fractions

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181555A (en) * 1981-05-02 1982-11-09 Dowa Teppun Kogyo Kk Spherical powdered iron carrier
US4592988A (en) * 1984-08-15 1986-06-03 Halomet, Inc. Ferrite toner carrier core composition derived from fly ash
JPS62174774A (en) * 1986-01-28 1987-07-31 Fujitsu Ltd Method and device for manufacturing two-component developer
JP3812955B2 (en) * 1993-08-24 2006-08-23 株式会社Ｎｅｏｍａｘ Carrier for developer and image forming method using the same
JP3885556B2 (en) * 2001-10-31 2007-02-21 富士ゼロックス株式会社 Image forming method, replenishing toner used in the method, manufacturing method thereof, and carrier-containing toner cartridge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187117B (en) * 1986-02-28 1990-10-24 De Beers Ind Diamond Method and apparatus for separating particles into fractions

Also Published As

Publication number Publication date
FR2308131B1 (en) 1979-05-04
NL7603978A (en) 1976-10-18
JPS51127735A (en) 1976-11-08
FR2308131A1 (en) 1976-11-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee