GB751843A - Improvements in or relating to magnetic record carriers - Google Patents

Improvements in or relating to magnetic record carriers

Info

Publication number
GB751843A
GB751843A GB20786/51A GB2078651A GB751843A GB 751843 A GB751843 A GB 751843A GB 20786/51 A GB20786/51 A GB 20786/51A GB 2078651 A GB2078651 A GB 2078651A GB 751843 A GB751843 A GB 751843A
Authority
GB
United Kingdom
Prior art keywords
magnetic
relating
magnetic record
record carriers
sept
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
GB20786/51A
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.)
Pollopas Patents Ltd
Original Assignee
Pollopas Patents 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 Pollopas Patents Ltd filed Critical Pollopas Patents Ltd
Priority to GB20786/51A priority Critical patent/GB751843A/en
Publication of GB751843A publication Critical patent/GB751843A/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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • G11B5/678—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
    • 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)
  • Magnetic Record Carriers (AREA)

Abstract

751,843. Magnetic sound records. FRIES G., and POLLOPAS PATENTS, Ltd. Sept. 3, 1952 [Sept. 3, 1951], No. 20786/51. Class 40(2) [Also in Group XXXV] A magnetic record carrier, comprises a laminated recording layer composed of a plurality of layers 0.1Á to 0.2Á thick of magnetizable material separated from each other by a layer of non-magnetic material. The magnetic layers may be vapour-deposited in a vacuum as in Specification 751,842 [Group XXXV]. ...
GB20786/51A 1951-09-03 1951-09-03 Improvements in or relating to magnetic record carriers Expired GB751843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20786/51A GB751843A (en) 1951-09-03 1951-09-03 Improvements in or relating to magnetic record carriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20786/51A GB751843A (en) 1951-09-03 1951-09-03 Improvements in or relating to magnetic record carriers

Publications (1)

Publication Number Publication Date
GB751843A true GB751843A (en) 1956-07-04

Family

ID=10151658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20786/51A Expired GB751843A (en) 1951-09-03 1951-09-03 Improvements in or relating to magnetic record carriers

Country Status (1)

Country Link
GB (1) GB751843A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161946A (en) * 1964-12-22 permalloy
US3232787A (en) * 1961-05-08 1966-02-01 Donald C Bennett Bistable magnetic film and method for making same
DE1284533B (en) * 1960-12-21 1968-12-05 Ncr Co Magnetic recording medium with two thin magnetic layers arranged one above the other and method for its production
DE1295731B (en) * 1962-06-08 1969-05-22 Greiner Magnetic recording medium made of thin magnetizable and non-magnetizable layers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161946A (en) * 1964-12-22 permalloy
DE1284533B (en) * 1960-12-21 1968-12-05 Ncr Co Magnetic recording medium with two thin magnetic layers arranged one above the other and method for its production
US3232787A (en) * 1961-05-08 1966-02-01 Donald C Bennett Bistable magnetic film and method for making same
DE1295731B (en) * 1962-06-08 1969-05-22 Greiner Magnetic recording medium made of thin magnetizable and non-magnetizable layers

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