DE3219780C2 - - Google Patents

Info

Publication number
DE3219780C2
DE3219780C2 DE3219780A DE3219780A DE3219780C2 DE 3219780 C2 DE3219780 C2 DE 3219780C2 DE 3219780 A DE3219780 A DE 3219780A DE 3219780 A DE3219780 A DE 3219780A DE 3219780 C2 DE3219780 C2 DE 3219780C2
Authority
DE
Germany
Prior art keywords
magnetic
recording
particles
platelet
recording material
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 - Lifetime
Application number
DE3219780A
Other languages
German (de)
English (en)
Other versions
DE3219780A1 (de
Inventor
Shinichiro Dezawa
Goro Akashi
Tatsuji Odawara Kanagawa Jp Kitamoto
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of DE3219780A1 publication Critical patent/DE3219780A1/de
Application granted granted Critical
Publication of DE3219780C2 publication Critical patent/DE3219780C2/de
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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the 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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Hard Magnetic Materials (AREA)
DE3219780A 1981-05-26 1982-05-26 Magnetisches aufzeichnungsmaterial Granted DE3219780A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079684A JPS57195327A (en) 1981-05-26 1981-05-26 Magnetic recording medium

Publications (2)

Publication Number Publication Date
DE3219780A1 DE3219780A1 (de) 1982-12-30
DE3219780C2 true DE3219780C2 (OSRAM) 1992-09-17

Family

ID=13697025

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3219780A Granted DE3219780A1 (de) 1981-05-26 1982-05-26 Magnetisches aufzeichnungsmaterial

Country Status (3)

Country Link
US (1) US4486496A (OSRAM)
JP (1) JPS57195327A (OSRAM)
DE (1) DE3219780A1 (OSRAM)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS586525A (ja) * 1981-07-02 1983-01-14 Toshiba Corp 磁気記録媒体
JPS5880136A (ja) * 1981-11-02 1983-05-14 Fuji Photo Film Co Ltd 磁気記録材料の製造方法
JPS5994231A (ja) * 1982-11-22 1984-05-30 Fuji Photo Film Co Ltd 磁気記録体
JPS5996532A (ja) * 1982-11-25 1984-06-04 Fuji Photo Film Co Ltd 磁気記録体
JPS6070518A (ja) * 1983-09-28 1985-04-22 Toshiba Corp 磁気記録媒体
JPS60119625A (ja) * 1983-12-01 1985-06-27 Fuji Photo Film Co Ltd 磁気記録媒体
JPS60127527A (ja) * 1983-12-15 1985-07-08 Saiteku Kk 膜状積重磁気記録媒体およびその製造方法
JPH0630142B2 (ja) * 1984-04-23 1994-04-20 富士写真フイルム株式会社 ディスク状磁気記録媒体
US4699771A (en) * 1984-05-14 1987-10-13 Kabushiki Kaisha Toshiba Magnetic recording powder, method of manufacturing thereof and application thereof
JPH0654532B2 (ja) * 1984-07-12 1994-07-20 富士写真フイルム株式会社 磁気記録媒体
GB2173811B (en) * 1985-04-05 1988-08-24 Tdk Corp Magnetic recording medium
GB2174710B (en) * 1985-04-22 1989-04-19 Tdk Corp Coating type perpendicular magnetic recording medium for digital recording
US4810555A (en) * 1985-04-22 1989-03-07 Tdk Corporation Magnetic recording medium
DE3683397D1 (de) * 1985-05-20 1992-02-27 Fujitsu Ltd Aufzeichnungsmedium mit longitudinal ausgerichteter magnetischer schicht.
JPS61289522A (ja) * 1985-06-17 1986-12-19 Fuji Photo Film Co Ltd 磁気記録媒体
US4726990A (en) * 1985-11-06 1988-02-23 Tdk Corporation Magnetic recording medium
US4772522A (en) * 1986-07-21 1988-09-20 Tdk Corporation Magnetic recording medium
JPS648508A (en) * 1987-06-30 1989-01-12 Toshiba Corp Magnetic recording medium
US5230818A (en) * 1991-12-20 1993-07-27 Eastman Kodak Company Coating compositions for master media for anhysteretic recording
EP0684597B1 (en) * 1993-12-01 2003-07-09 TDK Corporation Production method of magnetic recording medium
US5982736A (en) 1997-05-15 1999-11-09 Pierson; Gerald A. Trading card optical compact disc and methods of using and forming same
USD502469S1 (en) 1997-05-15 2005-03-01 Gerald A. Pierson Compact disc card
US7174369B1 (en) 1997-05-15 2007-02-06 Dxpdd, Inc. System and methods of updating compact disc cards and graphical user interface for updating same
US6939477B2 (en) 1997-06-06 2005-09-06 Ashland, Inc. Temperature-controlled induction heating of polymeric materials
US20090127253A1 (en) * 1997-06-06 2009-05-21 Philip Stark Temperature-controlled induction heating of polymeric materials
USD445113S1 (en) 1997-11-26 2001-07-17 Shape Cd, Inc. Compact disc
USD418502S (en) * 1998-09-03 2000-01-04 American Tract Society Compact disc
USD426203S (en) * 1998-09-17 2000-06-06 Shape Cd, Inc. Compact disc
USD421427S (en) * 1998-09-17 2000-03-07 Shape Cd, Inc. Compact disc
USD419152S (en) * 1999-02-11 2000-01-18 Shape Cd, Inc. Compact disk/mini disk
DE60122188T2 (de) * 2000-05-02 2007-07-05 Ashland Licensing and Intellectual Property LLC, Dublin Temperaturkontrollierte induktionserwärmung polymerer materialien
US7152097B1 (en) 2000-06-19 2006-12-19 Diskxpress Us, Inc. System and methods of updating compact discs and graphical user interface for updating same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023166A (en) * 1956-08-18 1962-02-27 Philips Corp Magnetic record carrier
US3185775A (en) * 1958-03-10 1965-05-25 Iit Res Inst Oriented tape
US3117065A (en) * 1959-09-02 1964-01-07 Magnetic Film And Tape Company Method and apparatus for making magnetic recording tape
JPS52108804A (en) * 1976-03-10 1977-09-12 Fuji Photo Film Co Ltd Magnetic recording material
US4171408A (en) * 1976-07-01 1979-10-16 U.S. Philips Corporation Device operating on the displacement of magnetic domain walls
JPS5891B2 (ja) * 1977-09-30 1983-01-05 俊一 岩崎 磁気記録媒体
JPS6050323B2 (ja) * 1978-12-22 1985-11-08 株式会社東芝 高密度記録体
DE2904491A1 (de) * 1979-02-07 1980-08-21 Bayer Ag Plaettchenfoermige eisenoxidpigmente und verfahren zu deren herstellung sowie deren verwendung
JPS55125536A (en) * 1979-03-16 1980-09-27 Fuji Photo Film Co Ltd Recording medium for vertical magnetic record
US4277809A (en) * 1979-09-26 1981-07-07 Memorex Corporation Apparatus for recording magnetic impulses perpendicular to the surface of a recording medium
US4355072A (en) * 1980-02-12 1982-10-19 U.S. Philips Corporation Magnetic hexagonal ferrite layer on a nonmagnetic hexagonal mixed crystal substrate
JPS586525A (ja) * 1981-07-02 1983-01-14 Toshiba Corp 磁気記録媒体

Also Published As

Publication number Publication date
US4486496A (en) 1984-12-04
DE3219780A1 (de) 1982-12-30
JPS57195327A (en) 1982-12-01

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Legal Events

Date Code Title Description
8128 New person/name/address of the agent

Representative=s name: KOHLER, M., DIPL.-CHEM. DR.RER.NAT., 8000 MUENCHEN

8128 New person/name/address of the agent

Representative=s name: SOLF, A., DR.-ING., 8000 MUENCHEN ZAPF, C., DIPL.-

8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee