GB748763A - Improvements in or relating to magnetic ink - Google Patents

Improvements in or relating to magnetic ink

Info

Publication number
GB748763A
GB748763A GB16752/52A GB1675252A GB748763A GB 748763 A GB748763 A GB 748763A GB 16752/52 A GB16752/52 A GB 16752/52A GB 1675252 A GB1675252 A GB 1675252A GB 748763 A GB748763 A GB 748763A
Authority
GB
United Kingdom
Prior art keywords
iron
july
microns
parts
per
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
GB16752/52A
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.)
Unisys Corp
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of GB748763A publication Critical patent/GB748763A/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)
  • Magnetic Record Carriers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

748,763. Magnetic dust. BURROUGHS CORPORATION, [formerly BURROUGHS ADDING MACHINE CO.]. July 3, 1952 [July 17, 1951; July 17, 1951], No. 16752/52. Class 38 (2). [Also in Groups XV and XVI] A magnetic ink composition for making records on non-magnetic materials, e.g. paper, or for impregnating ribbons used for typing such records comprises 50-70 per cent ferromagnetic material having a particle diameter not over 5 microns dispersed in 50-30 per cent of a viscous fluid consisting of organic esters, glycols or a mixture of oleic and lauric acids. Ferromagnetic materials specified are hydrogenreduced iron, electrolytic iron, Swedish sponge iron or iron made by decomposition of iron pentacarbonyl and having a particle density of 7.8 gs. per c.c. and an average particle diameter of 3 microns. Preferably the iron is reclassified to remove all particles of a diameter greater than 1.5 microns. A specific ink comprises 26 parts oleic acid, 5 parts lauric acid and 69 parts reclassified carbonyl iron, the proportions being by volume. After blending the mixture is subjected to ultrasonic vibrations at a frequency of 450 kilocycles per second.
GB16752/52A 1951-07-17 1952-07-03 Improvements in or relating to magnetic ink Expired GB748763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US748763XA 1951-07-17 1951-07-17

Publications (1)

Publication Number Publication Date
GB748763A true GB748763A (en) 1956-05-09

Family

ID=22122191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16752/52A Expired GB748763A (en) 1951-07-17 1952-07-03 Improvements in or relating to magnetic ink

Country Status (1)

Country Link
GB (1) GB748763A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213864B (en) * 1958-12-19 1966-04-07 Ibm Magnetic printing ink
US3247117A (en) * 1960-05-06 1966-04-19 Dick Co Ab Magnetic lithographic ink
US3470021A (en) * 1966-04-21 1969-09-30 Gevaert Photo Prod Nv Magnetic recording material
GB2128104A (en) * 1982-10-09 1984-04-26 Stratabord Limited Educational aids games and playthings
EP0464474A2 (en) * 1990-06-22 1992-01-08 MANTEGAZZA ANTONIO ARTI GRAFICHE S.r.l. Delible magnetic ink and process for making the same
EP0492208A1 (en) * 1990-12-22 1992-07-01 BASF Lacke + Farben AG Magnetic printing paints

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213864B (en) * 1958-12-19 1966-04-07 Ibm Magnetic printing ink
US3247117A (en) * 1960-05-06 1966-04-19 Dick Co Ab Magnetic lithographic ink
US3470021A (en) * 1966-04-21 1969-09-30 Gevaert Photo Prod Nv Magnetic recording material
GB2128104A (en) * 1982-10-09 1984-04-26 Stratabord Limited Educational aids games and playthings
EP0464474A2 (en) * 1990-06-22 1992-01-08 MANTEGAZZA ANTONIO ARTI GRAFICHE S.r.l. Delible magnetic ink and process for making the same
EP0464474A3 (en) * 1990-06-22 1993-04-21 Mantegazza Antonio Arti Grafiche S.R.L. Delible magnetic ink and process for making the same
EP0492208A1 (en) * 1990-12-22 1992-07-01 BASF Lacke + Farben AG Magnetic printing paints

Similar Documents

Publication Publication Date Title
GB748763A (en) Improvements in or relating to magnetic ink
GB1071733A (en) Improvements in or relating to sound-absorb ing and sealing material
JPS5559972A (en) Ink jet recording head
GB1501519A (en) Testing of magnetic recording and reproducing apparatus
ES186355A1 (en) A METHOD OF PREPARING MAGNETIC MATERIALS
GB752100A (en) Improvements in or relating to the production of permanent visible records by a beam of electrically charged particles
GB770838A (en) Improvements in or relating to non-metallic ferromagnetic materials and methods of manufacturing such materials
US2524433A (en) Magnetic recording
GB758320A (en) Improvements in or relating to non-metallic magnetic material and its process of manufacture
US2216970A (en) Phonograph record blank
GB1266645A (en)
GB653250A (en) Improvements in or relating to methods of producing sound recording material
GB672154A (en) Improvements in or relating to magnetic sound recording
GB1025616A (en) Flexible permanent magnet devices
GB836794A (en) Improvements in or relating to a method of and means for grinding and polishing glass sheets
GB718951A (en) Improvements in or relating to devices for vibrating small-sized articles or powders
GB469916A (en) Process and apparatus for recording sound oscillations
GB939727A (en) Improvements in and relating to magnetic recording media
GB665461A (en) Magnetic recording and reproducing
DE891623C (en) Magnetic sound recording process
GB689329A (en) Improvements in or relating to magnetogram records
GB1504445A (en) Barrel grinding media
SU661599A1 (en) Magnetic record carrier working layer
GB820932A (en) Improvements in and relating to marking compositions
SU1624541A1 (en) Composite magnetic material