GB861902A - Process for producing magnetic ink - Google Patents

Process for producing magnetic ink

Info

Publication number
GB861902A
GB861902A GB29160/59A GB2916059A GB861902A GB 861902 A GB861902 A GB 861902A GB 29160/59 A GB29160/59 A GB 29160/59A GB 2916059 A GB2916059 A GB 2916059A GB 861902 A GB861902 A GB 861902A
Authority
GB
United Kingdom
Prior art keywords
binding agent
magnetic
particles
support medium
solution
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
GB29160/59A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB861902A publication Critical patent/GB861902A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/16—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Paints Or Removers (AREA)

Abstract

861,902. Magnetic ink. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 26, 1959 [Aug. 26, 1958], No. 29160/59. Class 146(3). [Also in Group XXXV] A magnetic ink is made by wetting a powdered magnetic carrier with a solution of a thermoplastic binding agent, adding the wetted material to a support medium in which the binding agent is insoluble, agitating the moisture to form spherical liquid droplets discretely maintained in the support medium and each comprising particles of magnetic carrier surrounded by said solution, and extending the solvent therefrom to cause solidification of the binding agent covering said particles to form substantially spherical coatings on said magnetic particles The magnetic carrier may be powdered iron, nickel, cobalt, iron oxide, ferrites or alloys of iron, nickel, cobalt or molybdenum; the binding agent may be an epoxide resin, an asphalt, a polyamide, polystyrene, a coumarone-indene resin or a petroleum hydrocarbon; the solvent may be n- or sec-butanol, or toluene; and the support medium may be a viscous aqueous solution of an organic material (e.g. glycerol, methyl cellulose, gelatin or agar agar) or an aqueous slurry of an inorganic material (e.g. calcium carbonate, talc or calcium silicate).
GB29160/59A 1958-08-26 1959-08-26 Process for producing magnetic ink Expired GB861902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US861902XA 1958-08-26 1958-08-26

Publications (1)

Publication Number Publication Date
GB861902A true GB861902A (en) 1961-03-01

Family

ID=22196893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29160/59A Expired GB861902A (en) 1958-08-26 1959-08-26 Process for producing magnetic ink

Country Status (1)

Country Link
GB (1) GB861902A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220194813A1 (en) * 2019-04-25 2022-06-23 Nittetsu Mining Co., Ltd. Method for producing cobalt ferrite particles and cobalt ferrite particles produced by same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220194813A1 (en) * 2019-04-25 2022-06-23 Nittetsu Mining Co., Ltd. Method for producing cobalt ferrite particles and cobalt ferrite particles produced by same

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