FR2189805B1 - - Google Patents

Info

Publication number
FR2189805B1
FR2189805B1 FR7320795A FR7320795A FR2189805B1 FR 2189805 B1 FR2189805 B1 FR 2189805B1 FR 7320795 A FR7320795 A FR 7320795A FR 7320795 A FR7320795 A FR 7320795A FR 2189805 B1 FR2189805 B1 FR 2189805B1
Authority
FR
France
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
FR7320795A
Other versions
FR2189805A1 (fr
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Priority claimed from JP6217972A external-priority patent/JPS4922921A/ja
Priority claimed from JP1697373A external-priority patent/JPS5647604B2/ja
Priority claimed from JP1697573A external-priority patent/JPS5647605B2/ja
Priority claimed from JP1698073A external-priority patent/JPS5648892B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2189805A1 publication Critical patent/FR2189805A1/fr
Application granted granted Critical
Publication of FR2189805B1 publication Critical patent/FR2189805B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • 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
    • 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
    • Y10T29/49034—Treating to affect magnetic properties

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Magnetic Heads (AREA)
  • Soft Magnetic Materials (AREA)
FR7320795A 1972-06-20 1973-06-07 Expired FR2189805B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6217972A JPS4922921A (fr) 1972-06-20 1972-06-20
JP1697373A JPS5647604B2 (fr) 1973-02-09 1973-02-09
JP1697573A JPS5647605B2 (fr) 1973-02-09 1973-02-09
JP1698073A JPS5648892B2 (fr) 1973-02-09 1973-02-09

Publications (2)

Publication Number Publication Date
FR2189805A1 FR2189805A1 (fr) 1974-01-25
FR2189805B1 true FR2189805B1 (fr) 1976-09-17

Family

ID=27456686

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7320795A Expired FR2189805B1 (fr) 1972-06-20 1973-06-07

Country Status (7)

Country Link
US (1) US3931642A (fr)
CA (1) CA1003957A (fr)
DE (1) DE2330290C3 (fr)
FR (1) FR2189805B1 (fr)
GB (1) GB1436228A (fr)
IT (1) IT986180B (fr)
NL (1) NL175473C (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5496012A (en) * 1978-01-13 1979-07-30 Victor Co Of Japan Ltd Magnetic head
JPS55125519A (en) * 1979-03-23 1980-09-27 Hitachi Ltd Magnetic head
JPS56163518A (en) * 1980-05-16 1981-12-16 Hitachi Ltd Magnetic head
JPS5891517A (ja) * 1981-11-27 1983-05-31 Hitachi Ltd 磁気記録再生装置
NL8200481A (nl) * 1982-02-09 1983-09-01 Philips Nv Magneetkop.
GB2139404B (en) * 1983-04-19 1986-10-08 Hitachi Metals Ltd Magnetic head core and manufacturing method
JPS60224109A (ja) * 1984-04-20 1985-11-08 Hitachi Ltd 複合型磁気ヘツドを用いた磁気記録再生装置
DE69523035T2 (de) * 1994-11-09 2002-07-11 Koninkl Philips Electronics Nv Ablenkring aus gesintertem mgzn-ferrit-material, kathodenstrahlröhre mit einem solchen ring und förmkörper aus diesem material
US5966065A (en) * 1996-06-27 1999-10-12 Tdk Corporation Core for inductance elements and its production method
US7549215B2 (en) * 2007-03-28 2009-06-23 Hitachi Global Storage Technologies Netherlands B.V. Method for manufacturing a magnetic head for perpendicular magnetic data recording

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992474A (en) * 1958-11-17 1961-07-18 Adams Edmond Magnetic tape recorder heads
US3663767A (en) * 1968-11-16 1972-05-16 Tokyo Shibaura Electric Co Magnetic head
US3676610A (en) * 1970-04-03 1972-07-11 Rca Corp Magnetic head with modified grain boundaries

Also Published As

Publication number Publication date
NL7307759A (fr) 1973-12-27
DE2330290C3 (de) 1978-05-24
CA1003957A (en) 1977-01-18
NL175473B (nl) 1984-06-01
DE2330290B2 (de) 1977-10-06
FR2189805A1 (fr) 1974-01-25
NL175473C (nl) 1984-11-01
GB1436228A (en) 1976-05-19
US3931642A (en) 1976-01-06
DE2330290A1 (de) 1974-01-10
IT986180B (it) 1975-01-20

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