GB1427724A - Magnetic recording media - Google Patents

Magnetic recording media

Info

Publication number
GB1427724A
GB1427724A GB1436572A GB1436572A GB1427724A GB 1427724 A GB1427724 A GB 1427724A GB 1436572 A GB1436572 A GB 1436572A GB 1436572 A GB1436572 A GB 1436572A GB 1427724 A GB1427724 A GB 1427724A
Authority
GB
United Kingdom
Prior art keywords
magnetic recording
layer
recording media
magnetic
polyisobutylene
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
GB1436572A
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.)
EMI Ltd
Original Assignee
EMI Ltd
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 EMI Ltd filed Critical EMI Ltd
Priority to GB1436572A priority Critical patent/GB1427724A/en
Publication of GB1427724A publication Critical patent/GB1427724A/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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum

Landscapes

  • Paints Or Removers (AREA)

Abstract

1427724 Magnetic recording media EMI LTD 28 March 1973 [28 March 1972] 14365/72 Heading B2E [Also in Division C7] A magnetic recording medium includes a layer of magnetic metallic material on a substrate, and a layer of polyisobutylene over said metallic layer, to reduce wear. The substrate may be plastics, in the form of a tape or disc; the tape may have a backing layer, to reduce slippage and wear, of BaSO 4 or C particles, or it may have magnetic material on both sides. The magnetic material, e.g. Co-Cr alloy, and the polyisobutylene, may be vacuum vapour deposited.
GB1436572A 1972-03-28 1972-03-28 Magnetic recording media Expired GB1427724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1436572A GB1427724A (en) 1972-03-28 1972-03-28 Magnetic recording media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1436572A GB1427724A (en) 1972-03-28 1972-03-28 Magnetic recording media

Publications (1)

Publication Number Publication Date
GB1427724A true GB1427724A (en) 1976-03-10

Family

ID=10039898

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1436572A Expired GB1427724A (en) 1972-03-28 1972-03-28 Magnetic recording media

Country Status (1)

Country Link
GB (1) GB1427724A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210946A (en) * 1977-09-30 1980-07-01 Sony Corporation Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210946A (en) * 1977-09-30 1980-07-01 Sony Corporation Magnetic recording medium

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee