GB861902A - Process for producing magnetic ink - Google Patents
Process for producing magnetic inkInfo
- 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
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).
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)
| 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 |
-
1959
- 1959-08-26 GB GB29160/59A patent/GB861902A/en not_active Expired
Cited By (1)
| 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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