GB1384341A - Magnetogram carriers - Google Patents

Magnetogram carriers

Info

Publication number
GB1384341A
GB1384341A GB1830872A GB1830872A GB1384341A GB 1384341 A GB1384341 A GB 1384341A GB 1830872 A GB1830872 A GB 1830872A GB 1830872 A GB1830872 A GB 1830872A GB 1384341 A GB1384341 A GB 1384341A
Authority
GB
United Kingdom
Prior art keywords
magnetisable
powder
core
envelope
magnetograms
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
GB1830872A
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.)
Filmfabrik Wolfen VEB
Original Assignee
Filmfabrik Wolfen VEB
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 Filmfabrik Wolfen VEB filed Critical Filmfabrik Wolfen VEB
Priority to GB1830872A priority Critical patent/GB1384341A/en
Publication of GB1384341A publication Critical patent/GB1384341A/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
    • G11B5/62—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
    • G11B5/642—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent self supporting magnetic material, e.g. magnetisable wires

Landscapes

  • Hard Magnetic Materials (AREA)

Abstract

1384341 Magnetograms FILMFABRIK WOLFEN VEB 20 April 1972 18308/72 Heading B2E A filamentary magnetogram carrier comprises a core of a magnetisable powder and a non-magnetic envelope. The magnetisable core may be γ-Fe 2 O 3 , CrO 2 or a ferromagnetic metal powder. The magnetisable core may additionally contain a synthetic plastics material as binding agent. The non-magnetic envelope may include a polymeric material which dries physically or is hardenable by chemical or thermal means, or by means of high energy radiation. The magnetograms may be made by spinning hollow filaments to be filled with a magnetisable powder or by homogenising a magnetisable powder with a binding agent (e.g. a polyvinyl compound, a polyurethane, a polyamide or a polyester), extruding the mixture through a die e.g. a ceramic permanent magnet and envelopping the product in a synthetic plastics material. Such processes may be continuous. If desired the envelope may be applied in monomeric form and subsequently polymerised or crosslinked.
GB1830872A 1972-04-20 1972-04-20 Magnetogram carriers Expired GB1384341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1830872A GB1384341A (en) 1972-04-20 1972-04-20 Magnetogram carriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1830872A GB1384341A (en) 1972-04-20 1972-04-20 Magnetogram carriers

Publications (1)

Publication Number Publication Date
GB1384341A true GB1384341A (en) 1975-02-19

Family

ID=10110263

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1830872A Expired GB1384341A (en) 1972-04-20 1972-04-20 Magnetogram carriers

Country Status (1)

Country Link
GB (1) GB1384341A (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees