JPS52123221A - Magnetization of magnetically erasing head - Google Patents

Magnetization of magnetically erasing head

Info

Publication number
JPS52123221A
JPS52123221A JP3939476A JP3939476A JPS52123221A JP S52123221 A JPS52123221 A JP S52123221A JP 3939476 A JP3939476 A JP 3939476A JP 3939476 A JP3939476 A JP 3939476A JP S52123221 A JPS52123221 A JP S52123221A
Authority
JP
Japan
Prior art keywords
magnetization
erasing head
magnetically
magnetically erasing
head
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.)
Pending
Application number
JP3939476A
Other languages
Japanese (ja)
Inventor
Tatsuo Fujiwara
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3939476A priority Critical patent/JPS52123221A/en
Priority to US05/831,253 priority patent/US4146956A/en
Publication of JPS52123221A publication Critical patent/JPS52123221A/en
Pending 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/325—Erasing heads using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To ensure magnetizationof high density with a simple construction by accomplishing the magnetization in an laternating magnetic field with the use of an electromagnet which is made movable relative to a head.
JP3939476A 1976-04-09 1976-04-09 Magnetization of magnetically erasing head Pending JPS52123221A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3939476A JPS52123221A (en) 1976-04-09 1976-04-09 Magnetization of magnetically erasing head
US05/831,253 US4146956A (en) 1976-04-09 1977-09-07 Method for manufacturing a multipolar erasing head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3939476A JPS52123221A (en) 1976-04-09 1976-04-09 Magnetization of magnetically erasing head

Publications (1)

Publication Number Publication Date
JPS52123221A true JPS52123221A (en) 1977-10-17

Family

ID=12551772

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3939476A Pending JPS52123221A (en) 1976-04-09 1976-04-09 Magnetization of magnetically erasing head

Country Status (1)

Country Link
JP (1) JPS52123221A (en)

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