FR2379128A1 - Procede pour fabriquer un support rotatif a tetes magnetiques, et support rotatif a tetes magnetiques fabrique de la sorte - Google Patents

Procede pour fabriquer un support rotatif a tetes magnetiques, et support rotatif a tetes magnetiques fabrique de la sorte

Info

Publication number
FR2379128A1
FR2379128A1 FR7738410A FR7738410A FR2379128A1 FR 2379128 A1 FR2379128 A1 FR 2379128A1 FR 7738410 A FR7738410 A FR 7738410A FR 7738410 A FR7738410 A FR 7738410A FR 2379128 A1 FR2379128 A1 FR 2379128A1
Authority
FR
France
Prior art keywords
air gap
magnetic head
magnetic heads
useful air
located opposite
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.)
Granted
Application number
FR7738410A
Other languages
English (en)
Other versions
FR2379128B1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2379128A1 publication Critical patent/FR2379128A1/fr
Application granted granted Critical
Publication of FR2379128B1 publication Critical patent/FR2379128B1/fr
Granted 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • 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
    • 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
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface
    • 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.]
    • Y10T29/49027—Mounting preformed head/core onto other structure
    • 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
    • Y10T29/49036—Fabricating head structure or component thereof including measuring or testing
    • 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]

Landscapes

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

Abstract

Suivant ce procédé pour la fabrication d'un support rotatif à têtes magnétiques destiné à l'enregistrement et/ou à la reproduction de signaux couvrant un large spectre de fréquence, en particulier des signaux vidéo, alors que sur un support en forme de disque en un endroit déterminé situé en regard d'une surface de référence dont est muni le support et qui est perpendiculaire à l'axe de rotation de celui-ci, est élaborée au moins une tête magnétique qui comporte un circuit magnétique en forme de plaquette avec une surface de roulement, en entrefer utile, une fenêtre de bobine ainsi qu'une bobine passant par cette fenêtre à une certaine distance de ladite surface de référence du support, cette distance se situant dans la zone centrale de l'entrefer utile de la tête magnétique, est défini un niveau de référence pour l'entrefer utile de la tête magnétique, après quoi, par rapport à ce niveau et à l'aide d'un faisceau de laser orienté en direction de la surface de roulement de la tête magnétique, on éloigne, d'abord d'une des deux surfaces principales du circuit magnétique en forme de plaquette; et ensuite de l'autre surface principale située en regard de la précédente autant de matière sur la hauteur totale de l'entrefer que le permet la formation de deux évidements situés en regard et en forme de goulotte, la largeur de l'entrefer utile s'en trouvant réduite à une dimension définie d'avance.
FR7738410A 1976-12-22 1977-12-20 Procede pour fabriquer un support rotatif a tetes magnetiques, et support rotatif a tetes magnetiques fabrique de la sorte Granted FR2379128A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT953676A AT351797B (de) 1976-12-22 1976-12-22 Verfahren zum herstellen einer rotierend antreibbaren magnetkopfanordnung und nach einem solchen verfahren hergestellte magnetkopf- anordnung

Publications (2)

Publication Number Publication Date
FR2379128A1 true FR2379128A1 (fr) 1978-08-25
FR2379128B1 FR2379128B1 (fr) 1984-12-14

Family

ID=3615030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738410A Granted FR2379128A1 (fr) 1976-12-22 1977-12-20 Procede pour fabriquer un support rotatif a tetes magnetiques, et support rotatif a tetes magnetiques fabrique de la sorte

Country Status (8)

Country Link
US (1) US4186480A (fr)
JP (1) JPS5380212A (fr)
AT (1) AT351797B (fr)
DE (1) DE2755287C3 (fr)
ES (1) ES465258A1 (fr)
FR (1) FR2379128A1 (fr)
GB (1) GB1593310A (fr)
IT (1) IT1088722B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55117726A (en) * 1979-03-05 1980-09-10 Hitachi Ltd Manufacture of magnetic head
JPS56117326A (en) * 1980-02-18 1981-09-14 Victor Co Of Japan Ltd Rotary head type magnetic recording and reproducing device
JPS58171714A (ja) * 1982-04-01 1983-10-08 Matsushita Electric Ind Co Ltd ヘツド位置調整機
JPS6082715U (ja) * 1983-11-11 1985-06-07 キヤノン電子株式会社 回転ヘツド装置
AT388823B (de) * 1986-12-10 1989-09-11 Philips Nv Verfahren zum justieren der spalte von zwei auf einer kopfscheibe angeordneten magnetkoepfen und kopfscheibe mit zwei auf ihr angeordneten magnetkoepfen
JP2579098B2 (ja) * 1992-03-17 1997-02-05 松下電器産業株式会社 磁気ヘッドの位置決め方法
JP2615525B2 (ja) * 1992-04-15 1997-05-28 松下電器産業株式会社 磁気ヘッドの高さ調整方法
US5523539A (en) 1993-11-12 1996-06-04 Conner Peripherals, Inc. Process for manufacturing recording heads for magnetic storage devices
JPH08235517A (ja) * 1994-05-10 1996-09-13 Mitsubishi Electric Corp 磁気ヘッド及びその製造方法
US6217425B1 (en) * 1998-06-12 2001-04-17 Tdk Corporation Apparatus and method for lapping magnetic heads
US6974938B1 (en) 2000-03-08 2005-12-13 Tibotec Bvba Microscope having a stable autofocusing apparatus
CN1258754C (zh) * 2002-06-21 2006-06-07 阿尔卑斯电气株式会社 输出差小的旋转式磁鼓及使用这种磁鼓的磁带媒体记录再生装置
JP3797355B2 (ja) * 2003-10-22 2006-07-19 セイコーエプソン株式会社 圧電振動子の製造方法
FI118017B (fi) * 2004-03-11 2007-05-31 Metso Paper Inc Alipainehihnakuljetin päänvientinauhan viemiseksi rainanmuodostuskoneessa

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621153A (en) * 1969-12-22 1971-11-16 Ibm Magnetic read/write head with partial gap and method of making
US4017965A (en) * 1975-06-16 1977-04-19 Burroughs Corporation Method of making a transducer head with narrow core structure
US4120008A (en) * 1976-10-05 1978-10-10 Eastman Kodak Company Overlap track servo for dynamic position correction in a rotary-head tape recorder

Also Published As

Publication number Publication date
DE2755287B2 (de) 1979-04-19
IT1088722B (it) 1985-06-10
DE2755287C3 (de) 1979-12-06
JPS5380212A (en) 1978-07-15
DE2755287A1 (de) 1978-06-29
GB1593310A (en) 1981-07-15
ATA953676A (de) 1979-01-15
US4186480A (en) 1980-02-05
JPS57567B2 (fr) 1982-01-07
FR2379128B1 (fr) 1984-12-14
AT351797B (de) 1979-08-10
ES465258A1 (es) 1978-09-16

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Legal Events

Date Code Title Description
ST Notification of lapse