GB1513750A - Apparatus for and methods of erasing magnetic recording media - Google Patents

Apparatus for and methods of erasing magnetic recording media

Info

Publication number
GB1513750A
GB1513750A GB28582/75A GB2858275A GB1513750A GB 1513750 A GB1513750 A GB 1513750A GB 28582/75 A GB28582/75 A GB 28582/75A GB 2858275 A GB2858275 A GB 2858275A GB 1513750 A GB1513750 A GB 1513750A
Authority
GB
United Kingdom
Prior art keywords
medium
electromagnet
particles
parallel
field
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
GB28582/75A
Other languages
English (en)
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.)
Simrad AS
Original Assignee
Simrad AS
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 Simrad AS filed Critical Simrad AS
Publication of GB1513750A publication Critical patent/GB1513750A/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
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
    • G01D15/12—Magnetic recording elements
    • 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
GB28582/75A 1974-07-08 1975-07-07 Apparatus for and methods of erasing magnetic recording media Expired GB1513750A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO742475A NO136506C (no) 1974-07-08 1974-07-08 Fremgangsm}te og apparat for utvisking av magnetisk skrift

Publications (1)

Publication Number Publication Date
GB1513750A true GB1513750A (en) 1978-06-07

Family

ID=19881713

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28582/75A Expired GB1513750A (en) 1974-07-08 1975-07-07 Apparatus for and methods of erasing magnetic recording media

Country Status (5)

Country Link
JP (1) JPS5131214A (da)
DE (1) DE2530092A1 (da)
FR (1) FR2278129A1 (da)
GB (1) GB1513750A (da)
NO (1) NO136506C (da)

Also Published As

Publication number Publication date
FR2278129A1 (fr) 1976-02-06
NO136506B (da) 1977-06-06
NO742475L (da) 1976-01-09
NO136506C (no) 1977-09-21
FR2278129B1 (da) 1980-12-26
JPS5131214A (da) 1976-03-17
DE2530092A1 (de) 1976-01-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee