GB1532080A - Ferrite electrostatographic carrier particles - Google Patents

Ferrite electrostatographic carrier particles

Info

Publication number
GB1532080A
GB1532080A GB44153/76A GB4415376A GB1532080A GB 1532080 A GB1532080 A GB 1532080A GB 44153/76 A GB44153/76 A GB 44153/76A GB 4415376 A GB4415376 A GB 4415376A GB 1532080 A GB1532080 A GB 1532080A
Authority
GB
United Kingdom
Prior art keywords
particles
slurry
oxides
resins
beads
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
GB44153/76A
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.)
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
Priority claimed from US05/626,906 external-priority patent/US3996392A/en
Priority claimed from US05/626,907 external-priority patent/US4075391A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1532080A publication Critical patent/GB1532080A/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

Abstract

1532080 Carriers for electrostatographic developers XEROX CORP 25 Oct 1976 [29 Oct 1975 (2)] 44153/76 Heading C1J [Also in Division G2] Ferrite carrier particles for electrostatographic developers are prepared by mixing ferrite-forming metal oxides, calcining (e.g. heating up to 2150‹ F.) the mixed oxides to cause partial reaction to give a saturation magnetic moment of at least 0 1 e.m.u./ gram, milling the calcined oxides in a slurry which also contains MnO, a sodium free deflocculant and a binder, spray-drying the slurry to form spherical beads, firing the beads (e.g. up to 2500‹ F., deagglomerating and screening the beads to form the desired particles which have surface Na less than 20 p.p.m., surface Zn less than 5000 p.p.n. and a BET surface area of between 170 and 500 c.c./g. Normally Fe 3 O 4 , ZnO and NiO are initially mixed and MnO, CuO ml. ammonium lignin sulphonate and water are added to the calcined oxides to form a slurry to which gum arabic is added after milling but before spray drying. The particles may be coated with a polymer and admixed with toner particles (e.g. styrene/alkyl methacrylate copolymer and C black) to form a developer. Other toner particles are natural resins, phenolformaldehyde resins, epoxy resins, polystyrene, polyethylenes, coumarone-indene resin and acrylic resins.
GB44153/76A 1975-10-29 1976-10-25 Ferrite electrostatographic carrier particles Expired GB1532080A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/626,906 US3996392A (en) 1975-10-29 1975-10-29 Humidity-insensitive ferrite developer materials
US05/626,907 US4075391A (en) 1975-10-29 1975-10-29 Production of ferrite electrostatographic carrier materials having improved properties

Publications (1)

Publication Number Publication Date
GB1532080A true GB1532080A (en) 1978-11-15

Family

ID=27090281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44153/76A Expired GB1532080A (en) 1975-10-29 1976-10-25 Ferrite electrostatographic carrier particles

Country Status (11)

Country Link
JP (1) JPS609265B2 (en)
AU (1) AU502548B2 (en)
BR (1) BR7607182A (en)
CA (1) CA1076406A (en)
DE (1) DE2649591C2 (en)
FR (1) FR2330041A1 (en)
GB (1) GB1532080A (en)
IT (1) IT1071477B (en)
MX (1) MX146295A (en)
NL (1) NL7612068A (en)
SE (1) SE7611826L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2581791A1 (en) * 2010-06-14 2013-04-17 DOWA Electronics Materials Co., Ltd. Carrier core material for electrophotographic developer, carrier for electrophotographic developer, electrophotographic developer, and method for producing carrier core material for electrophotographic developer

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6036082B2 (en) * 1978-10-27 1985-08-19 ティーディーケイ株式会社 Ferrite powder for electrophotographic magnetic toner and method for producing the same
JPS5585426A (en) * 1978-12-21 1980-06-27 Tdk Corp Magnetic powder for toner or ink and production thereof
JPS58123549A (en) * 1982-01-19 1983-07-22 Hitachi Metals Ltd Electrophotographic developing carrier
JPS58123555A (en) * 1982-01-19 1983-07-22 Hitachi Metals Ltd Electrophotographic developing carrier
JPS58123553A (en) * 1982-01-19 1983-07-22 Hitachi Metals Ltd Electrophotographic developing carrier
JPS58145622A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS58145621A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS58145625A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS58202456A (en) * 1982-04-07 1983-11-25 Hitachi Metals Ltd Electrophotographic ferrite carrier
JPS58179850A (en) * 1982-04-15 1983-10-21 Hitachi Metals Ltd Ferrite carrier for electrophotography
JPS5948774A (en) * 1982-09-13 1984-03-21 Nippon Teppun Kk Carrier for electrophotographic development
JPH0664362B2 (en) * 1982-12-15 1994-08-22 日立金属株式会社 Ferrite Carrier for Electrophotography
JPS59139052A (en) * 1983-01-31 1984-08-09 Fuji Xerox Co Ltd Developing agent for electronic copying machine
JPS6060930A (en) * 1983-09-13 1985-04-08 Dowa Mining Co Ltd Manufacture of spherical ferrite powder
WO1985002715A1 (en) * 1983-12-05 1985-06-20 Honeywell Inc. Semiconductor device pad area protection structure
JPS60134249A (en) * 1983-12-22 1985-07-17 Fuji Elelctrochem Co Ltd Ferrite carrier material for electrostatic copying
JPH0648399B2 (en) * 1984-02-17 1994-06-22 三田工業株式会社 Method of developing electrostatic image
JPH0697350B2 (en) * 1985-07-16 1994-11-30 キヤノン株式会社 Electrophotographic development method
JPS63118176A (en) * 1987-10-13 1988-05-23 Sanyo Electric Co Ltd Image forming device
DE69519055T2 (en) 1994-06-22 2001-05-31 Canon Kk Carriers for electrophotography, two-component developers and methods for image production
JP5522451B2 (en) 2010-02-26 2014-06-18 パウダーテック株式会社 Ferrite carrier core material for electrophotographic developer, ferrite carrier, and electrophotographic developer using the ferrite carrier
CN111909646B (en) * 2020-08-07 2021-12-17 湖南福湘木业有限责任公司 Mould-proof modification method for soybean-based adhesive

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929657A (en) * 1973-09-05 1975-12-30 Xerox Corp Stoichiometric ferrite carriers
CA1054837A (en) * 1973-12-12 1979-05-22 Xerox Corporation Spherical, void-free particle formation in spray-dried ferrites

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2581791A1 (en) * 2010-06-14 2013-04-17 DOWA Electronics Materials Co., Ltd. Carrier core material for electrophotographic developer, carrier for electrophotographic developer, electrophotographic developer, and method for producing carrier core material for electrophotographic developer
EP2581791A4 (en) * 2010-06-14 2014-10-22 Dowa Electronics Materials Co Carrier core material for electrophotographic developer, carrier for electrophotographic developer, electrophotographic developer, and method for producing carrier core material for electrophotographic developer

Also Published As

Publication number Publication date
JPS5256536A (en) 1977-05-10
IT1071477B (en) 1985-04-10
BR7607182A (en) 1977-09-13
CA1076406A (en) 1980-04-29
AU1893076A (en) 1978-04-27
FR2330041B1 (en) 1981-12-31
MX146295A (en) 1982-06-03
AU502548B2 (en) 1979-08-02
DE2649591A1 (en) 1977-05-12
DE2649591C2 (en) 1985-10-24
JPS609265B2 (en) 1985-03-08
FR2330041A1 (en) 1977-05-27
NL7612068A (en) 1977-05-03
SE7611826L (en) 1977-04-30

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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