GB820932A - Improvements in and relating to marking compositions - Google Patents

Improvements in and relating to marking compositions

Info

Publication number
GB820932A
GB820932A GB34131/58A GB3413158A GB820932A GB 820932 A GB820932 A GB 820932A GB 34131/58 A GB34131/58 A GB 34131/58A GB 3413158 A GB3413158 A GB 3413158A GB 820932 A GB820932 A GB 820932A
Authority
GB
United Kingdom
Prior art keywords
parts
solvent
relating
powder
marking compositions
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
GB34131/58A
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 GB820932A publication Critical patent/GB820932A/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

Abstract

A magnetic ink composition for producing markings both optically and magnetically detectable on a record surface comprises iron powder (300 mesh screen) 30 parts, polyvinyl methyl ether (50% aqueous solution) 2 parts, chlorinated paraffin (C24H29Cl21) 3 parts, stearic acid polyamide 0.5 parts, and toluene (as solvent) 6.50 parts. The granules of iron become coated with the thermoplastic mixture. After evaporation of solvent the mass may be ground and used as a powder.
GB34131/58A 1954-12-20 1955-12-15 Improvements in and relating to marking compositions Expired GB820932A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US820932XA 1954-12-20 1954-12-20

Publications (1)

Publication Number Publication Date
GB820932A true GB820932A (en) 1959-09-30

Family

ID=22169023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34131/58A Expired GB820932A (en) 1954-12-20 1955-12-15 Improvements in and relating to marking compositions

Country Status (1)

Country Link
GB (1) GB820932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325960A1 (en) * 1983-07-19 1985-02-07 Herbert 4300 Essen Schlieper MAGNETICALLY EFFECTIVE COLOR AND THEIR USE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325960A1 (en) * 1983-07-19 1985-02-07 Herbert 4300 Essen Schlieper MAGNETICALLY EFFECTIVE COLOR AND THEIR USE
DE3325960C2 (en) * 1983-07-19 1985-06-20 Herbert 4300 Essen Schlieper Magnetically effective paint and its use

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