GB1291366A - Magnetic tape - Google Patents

Magnetic tape

Info

Publication number
GB1291366A
GB1291366A GB8717/70A GB871770A GB1291366A GB 1291366 A GB1291366 A GB 1291366A GB 8717/70 A GB8717/70 A GB 8717/70A GB 871770 A GB871770 A GB 871770A GB 1291366 A GB1291366 A GB 1291366A
Authority
GB
United Kingdom
Prior art keywords
magnetic
layer
fields
particles
feb
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
GB8717/70A
Other languages
English (en)
Inventor
Harry John Krall
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1291366A publication Critical patent/GB1291366A/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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
GB8717/70A 1969-02-24 1970-02-24 Magnetic tape Expired GB1291366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80140969A 1969-02-24 1969-02-24

Publications (1)

Publication Number Publication Date
GB1291366A true GB1291366A (en) 1972-10-04

Family

ID=25181013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8717/70A Expired GB1291366A (en) 1969-02-24 1970-02-24 Magnetic tape

Country Status (5)

Country Link
US (1) US3627580A (enExample)
BE (1) BE746382A (enExample)
DE (1) DE2008325B2 (enExample)
FR (1) FR2033015A5 (enExample)
GB (1) GB1291366A (enExample)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242363B2 (enExample) * 1973-03-20 1977-10-24
US4281043A (en) * 1973-10-31 1981-07-28 Graham Magnetics, Inc. Polymodal magnetic recording media and compositions useful therein
US4208447A (en) * 1978-06-05 1980-06-17 International Business Machines Corporation Method for disorienting magnetic particles
JPS56117336A (en) * 1980-02-19 1981-09-14 Sony Corp Manufacture of magnetic recording medium
JPS56119938A (en) * 1980-02-22 1981-09-19 Sony Corp Production of magnetic recording medium
EP0043882A1 (en) * 1980-07-16 1982-01-20 Kodak-Pathe Magnetic recording element, process for making the same and its use in recording
JPS5999471A (ja) * 1982-11-29 1984-06-08 Fuji Xerox Co Ltd 磁気記録媒体の製造方法
JPS59124039A (ja) * 1982-12-29 1984-07-18 Fuji Photo Film Co Ltd 磁気記録媒体の製法
DE3308052A1 (de) * 1983-03-08 1984-09-13 Agfa-Gevaert Ag, 5090 Leverkusen Verfahren zur herstellung eines magnetischen aufzeichnungsmaterials mit senkrechtausrichtung
DE3736024C1 (en) * 1987-10-24 1989-03-23 Agfa Gevaert Ag Demagnetising device
JP2514828B2 (ja) * 1988-01-18 1996-07-10 富士写真フイルム株式会社 磁気記録媒体の製造方法
US5420742A (en) * 1993-07-30 1995-05-30 Minnesota Mining And Manufacturing Degausser for tape with plural recorded segments
US7604855B2 (en) * 2002-07-15 2009-10-20 Jds Uniphase Corporation Kinematic images formed by orienting alignable flakes
US7517578B2 (en) * 2002-07-15 2009-04-14 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US7667895B2 (en) 1999-07-08 2010-02-23 Jds Uniphase Corporation Patterned structures with optically variable effects
US7047883B2 (en) * 2002-07-15 2006-05-23 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US11768321B2 (en) 2000-01-21 2023-09-26 Viavi Solutions Inc. Optically variable security devices
US6902807B1 (en) * 2002-09-13 2005-06-07 Flex Products, Inc. Alignable diffractive pigment flakes
US7625632B2 (en) 2002-07-15 2009-12-01 Jds Uniphase Corporation Alignable diffractive pigment flakes and method and apparatus for alignment and images formed therefrom
US7934451B2 (en) 2002-07-15 2011-05-03 Jds Uniphase Corporation Apparatus for orienting magnetic flakes
US11230127B2 (en) 2002-07-15 2022-01-25 Viavi Solutions Inc. Method and apparatus for orienting magnetic flakes
US7241489B2 (en) * 2002-09-13 2007-07-10 Jds Uniphase Corporation Opaque flake for covert security applications
US9164575B2 (en) 2002-09-13 2015-10-20 Jds Uniphase Corporation Provision of frames or borders around pigment flakes for covert security applications
US7674501B2 (en) 2002-09-13 2010-03-09 Jds Uniphase Corporation Two-step method of coating an article for security printing by application of electric or magnetic field
US8025952B2 (en) 2002-09-13 2011-09-27 Jds Uniphase Corporation Printed magnetic ink overt security image
US7645510B2 (en) 2002-09-13 2010-01-12 Jds Uniphase Corporation Provision of frames or borders around opaque flakes for covert security applications
US9458324B2 (en) 2002-09-13 2016-10-04 Viava Solutions Inc. Flakes with undulate borders and method of forming thereof
US7258915B2 (en) * 2003-08-14 2007-08-21 Jds Uniphase Corporation Flake for covert security applications
US7550197B2 (en) 2003-08-14 2009-06-23 Jds Uniphase Corporation Non-toxic flakes for authentication of pharmaceutical articles
CA2541568C (en) 2005-04-06 2014-05-13 Jds Uniphase Corporation Dynamic appearance-changing optical devices (dacod) printed in a shaped magnetic field including printable fresnel structures
CA2564764C (en) 2005-10-25 2014-05-13 Jds Uniphase Corporation Patterned optical structures with enhanced security feature
CA2570965A1 (en) 2005-12-15 2007-06-15 Jds Uniphase Corporation Security device with metameric features using diffractive pigment flakes
US10343436B2 (en) 2006-02-27 2019-07-09 Viavi Solutions Inc. Security device formed by printing with special effect inks
US12204120B2 (en) 2006-03-06 2025-01-21 Viavi Solutions Inc. Optically variable security devices
CA2592667C (en) 2006-07-12 2014-05-13 Jds Uniphase Corporation Stamping a coating of cured field aligned special effect flakes and image formed thereby
JP4684263B2 (ja) * 2007-06-18 2011-05-18 日立マクセル株式会社 磁気記録媒体の消磁装置及び消磁方法と磁気記録媒体の製造方法
JP2009193069A (ja) 2008-02-13 2009-08-27 Jds Uniphase Corp 光学的な特殊効果フレークを含むレーザ印刷用の媒体
RU2728839C2 (ru) 2012-01-12 2020-07-31 Виави Солюшнз Инк. Изделие с изогнутыми узорами, сформированными из выровненных пигментных хлопьев

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2784259A (en) * 1952-12-17 1957-03-05 Armour Res Found Recording and erase head for magnetic recorders
GB933762A (en) * 1958-12-04 1963-08-14 Emi Ltd Improvements in or relating to magnetic recording media
NL277788A (enExample) * 1961-04-28 1900-01-01
US3256112A (en) * 1962-07-23 1966-06-14 Iit Res Inst Method and apparatus for orienting magnetic particles of a recording medium and magnetic recording medium
GB1116011A (en) * 1965-07-23 1968-06-06 Lew William Karalus Recording tape
US3416949A (en) * 1965-08-02 1968-12-17 Iit Res Inst Low noise record medium and method for producing the same
US3413141A (en) * 1965-09-02 1968-11-26 Ibm Method and apparatus for making oriented magnetic recording media
US3490945A (en) * 1966-11-15 1970-01-20 Rca Corp Magnetic recording element and method for preparing same

Also Published As

Publication number Publication date
BE746382A (fr) 1970-07-31
US3627580A (en) 1971-12-14
FR2033015A5 (enExample) 1970-11-27
DE2008325B2 (de) 1973-07-05
DE2008325A1 (de) 1970-11-12

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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