GB870570A - Magnetic record carriers - Google Patents

Magnetic record carriers

Info

Publication number
GB870570A
GB870570A GB5087/59A GB508759A GB870570A GB 870570 A GB870570 A GB 870570A GB 5087/59 A GB5087/59 A GB 5087/59A GB 508759 A GB508759 A GB 508759A GB 870570 A GB870570 A GB 870570A
Authority
GB
United Kingdom
Prior art keywords
magnetic record
magnetic
feb
polycarbonate
record carriers
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
GB5087/59A
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.)
Agfa Gevaert NV
Original Assignee
Agfa AG
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 Agfa AG filed Critical Agfa AG
Publication of GB870570A publication Critical patent/GB870570A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates

Landscapes

  • Paints Or Removers (AREA)

Abstract

870,570. Magnetic structures. AGFA A.G. Feb. 13, 1959 [Feb. 15, 1958], No. 5087/59. Addition to 834,101. Class 38 (2). In a magnetic record carrier similar to those disclosed in the parent Specification in which a magnetic powder dispersed in a binder is coated on a support formed from a polycarbonate, the strength of the support is increased by stretching at a temperature 20‹ C. or more above the conversion temperature but below the melting point. The polycarbonate may be derived from a di-(monohydroxyaryl) alkane or a mixture of one of these with an additional organic compound.
GB5087/59A 1958-02-15 1959-02-13 Magnetic record carriers Expired GB870570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE870570X 1958-02-15

Publications (1)

Publication Number Publication Date
GB870570A true GB870570A (en) 1961-06-14

Family

ID=6807185

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5087/59A Expired GB870570A (en) 1958-02-15 1959-02-13 Magnetic record carriers

Country Status (1)

Country Link
GB (1) GB870570A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987232A (en) 1970-06-29 1976-10-19 Eastman Kodak Company Magnetic recording materials having great resistance to wear and tear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987232A (en) 1970-06-29 1976-10-19 Eastman Kodak Company Magnetic recording materials having great resistance to wear and tear

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