CA1010568A - Magnetic recording disc having circularly oriented magnetic particles and method of making same - Google Patents

Magnetic recording disc having circularly oriented magnetic particles and method of making same

Info

Publication number
CA1010568A
CA1010568A CA160,457A CA160457A CA1010568A CA 1010568 A CA1010568 A CA 1010568A CA 160457 A CA160457 A CA 160457A CA 1010568 A CA1010568 A CA 1010568A
Authority
CA
Canada
Prior art keywords
making same
recording disc
magnetic recording
magnetic particles
circularly oriented
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
CA160,457A
Other languages
English (en)
Other versions
CA160457S (en
Inventor
Edward C. Waldspurger
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.)
Meritor Inc
Original Assignee
Arvin Industries Inc
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 Arvin Industries Inc filed Critical Arvin Industries Inc
Application granted granted Critical
Publication of CA1010568A publication Critical patent/CA1010568A/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
    • G11B5/852—Orientation in a magnetic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/005—Producing optically read record carriers, e.g. optical discs
    • B29D17/007—Forming the relief pattern on a support larger than the record
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0014—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form
    • G11B23/0021—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture record carriers not specifically of filamentary or web form discs
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers
    • G11B5/825—Disk carriers flexible discs
    • 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

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
CA160,457A 1972-02-03 1973-01-03 Magnetic recording disc having circularly oriented magnetic particles and method of making same Expired CA1010568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22307872A 1972-02-03 1972-02-03

Publications (1)

Publication Number Publication Date
CA1010568A true CA1010568A (en) 1977-05-17

Family

ID=22834929

Family Applications (1)

Application Number Title Priority Date Filing Date
CA160,457A Expired CA1010568A (en) 1972-02-03 1973-01-03 Magnetic recording disc having circularly oriented magnetic particles and method of making same

Country Status (5)

Country Link
JP (1) JPS4889704A (hu)
CA (1) CA1010568A (hu)
DE (1) DE2304311A1 (hu)
FR (1) FR2173983B3 (hu)
GB (1) GB1416495A (hu)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075672A (en) * 1976-02-09 1978-02-21 Graham Magnetics Incorporated Magnetic recording members
JPS6011370B2 (ja) * 1976-11-16 1985-03-25 富士写真フイルム株式会社 磁気記録媒体
US4237506A (en) * 1978-04-03 1980-12-02 Graham Magnetics Inc. Polymodal magnetic recording member
DE2928096A1 (de) * 1979-07-12 1981-02-05 Basf Ag Magnetischer aufzeichnungstraeger
BR8008111A (pt) * 1979-12-13 1981-06-30 Dysan Corp Processo para a fabricacao de um disco revestido flexivel,aparelhagem para o tratamento deste e dito disco de gravacao flexivel
JPS58122623A (ja) * 1982-01-14 1983-07-21 Sony Corp 円盤状磁気記録媒体

Also Published As

Publication number Publication date
FR2173983B3 (hu) 1976-01-30
FR2173983A1 (hu) 1973-10-12
GB1416495A (en) 1975-12-03
JPS4889704A (hu) 1973-11-22
DE2304311A1 (de) 1973-08-16

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