GB1340422A - Methods of making cores for magnetic recording and reproducing heads - Google Patents

Methods of making cores for magnetic recording and reproducing heads

Info

Publication number
GB1340422A
GB1340422A GB322371A GB1340422DA GB1340422A GB 1340422 A GB1340422 A GB 1340422A GB 322371 A GB322371 A GB 322371A GB 1340422D A GB1340422D A GB 1340422DA GB 1340422 A GB1340422 A GB 1340422A
Authority
GB
United Kingdom
Prior art keywords
ridges
track
gap
magnetic
assembly
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
GB322371A
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.)
Fujitsu Services Ltd
Original Assignee
Fujitsu Services 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 Fujitsu Services Ltd filed Critical Fujitsu Services Ltd
Publication of GB1340422A publication Critical patent/GB1340422A/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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • 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
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • 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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49048—Machining magnetic material [e.g., grinding, etching, polishing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49021—Magnetic recording reproducing transducer [e.g., tape head, core, etc.]
    • Y10T29/49032—Fabricating head structure or component thereof
    • Y10T29/49055—Fabricating head structure or component thereof with bond/laminating preformed parts, at least two magnetic
    • Y10T29/49057—Using glass bonding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
GB322371A 1971-01-26 1971-01-26 Methods of making cores for magnetic recording and reproducing heads Expired GB1340422A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB322371 1971-01-26

Publications (1)

Publication Number Publication Date
GB1340422A true GB1340422A (en) 1973-12-12

Family

ID=9754295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB322371A Expired GB1340422A (en) 1971-01-26 1971-01-26 Methods of making cores for magnetic recording and reproducing heads

Country Status (4)

Country Link
US (1) US3798758A (enExample)
JP (1) JPS5414490B1 (enExample)
FR (1) FR2123450B1 (enExample)
GB (1) GB1340422A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147448A (en) * 1983-09-30 1985-05-09 Victor Company Of Japan Magnetic head with azimuth having a tip portion oriented in a given direction and method for manufacturing the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06101091B2 (ja) * 1988-05-17 1994-12-12 日本碍子株式会社 磁気ヘッド用コア
JP2000231704A (ja) * 1999-02-09 2000-08-22 Mitsumi Electric Co Ltd 磁気カード用マルチ磁気ヘッド
WO2020096054A1 (ja) 2018-11-08 2020-05-14 ヴァレオカペックジャパン株式会社 トルクコンバータのロックアップ装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369292A (en) * 1962-11-23 1968-02-20 North American Phillips Compan Method of forming glass bonded heads
US3514851A (en) * 1967-04-03 1970-06-02 Control Data Corp Method of manufacturing a magnetic head structure
NL162495C (nl) * 1969-03-10 Matsushita Electric Industrial Co Ltd Meerkanaals magneetkop.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147448A (en) * 1983-09-30 1985-05-09 Victor Company Of Japan Magnetic head with azimuth having a tip portion oriented in a given direction and method for manufacturing the same

Also Published As

Publication number Publication date
JPS5414490B1 (enExample) 1979-06-07
US3798758A (en) 1974-03-26
FR2123450B1 (enExample) 1975-02-14
FR2123450A1 (enExample) 1972-09-08

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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