FR2391526A1 - Procede et dispositif pour la fabrication de supports d'enregistrements magnetiques - Google Patents

Procede et dispositif pour la fabrication de supports d'enregistrements magnetiques

Info

Publication number
FR2391526A1
FR2391526A1 FR7814420A FR7814420A FR2391526A1 FR 2391526 A1 FR2391526 A1 FR 2391526A1 FR 7814420 A FR7814420 A FR 7814420A FR 7814420 A FR7814420 A FR 7814420A FR 2391526 A1 FR2391526 A1 FR 2391526A1
Authority
FR
France
Prior art keywords
magnetic
recording media
dispersion
magnetic recording
manufacture
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
FR7814420A
Other languages
English (en)
Other versions
FR2391526B1 (fr
Inventor
Werner Dipl Ing Huebner
Job-Werner Dipl Chem Hartmann
Friedrich Dipl Ing Domas
Peter Dipl Ing Nagel
Paul Dr Deigner
Eberhard Dipl Phys Dr Koester
Hans Hauser
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of FR2391526A1 publication Critical patent/FR2391526A1/fr
Application granted granted Critical
Publication of FR2391526B1 publication Critical patent/FR2391526B1/fr
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
    • 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
    • G11B5/848—Coating a support with a magnetic layer by extrusion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

L'invention concerne un procédé de fabrication de supports d'enregistrements magnétiques, dans lequel immédiatement avant l'application de la dispersion magnétique sur un support non magnétique, cette dispersion magnétique est soumise à un effort (ou contrainte) de cisaillement par la production d'un gradient de vitesse de cisaillement dans ladite dispersion. La dispersion magnétique est refoulée à travers une fente ayant une largeur d'entrée d1 et une largeur de sortie d2 , tandis que le gradient de vitesse de cisaillement D augmente constamment suivant la relation mathématique :
FR7814420A 1977-05-16 1978-05-16 Procede et dispositif pour la fabrication de supports d'enregistrements magnetiques Expired FR2391526B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2722078A DE2722078C3 (de) 1977-05-16 1977-05-16 Verfahren und vorrichtung zur herstellung von magnetogrammtraegern

Publications (2)

Publication Number Publication Date
FR2391526A1 true FR2391526A1 (fr) 1978-12-15
FR2391526B1 FR2391526B1 (fr) 1982-06-25

Family

ID=6009098

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7814420A Expired FR2391526B1 (fr) 1977-05-16 1978-05-16 Procede et dispositif pour la fabrication de supports d'enregistrements magnetiques

Country Status (6)

Country Link
US (1) US4201486A (fr)
JP (1) JPS6044726B2 (fr)
DE (1) DE2722078C3 (fr)
FR (1) FR2391526B1 (fr)
GB (1) GB1599712A (fr)
NL (1) NL181608C (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054766A (ja) * 1983-09-03 1985-03-29 Konishiroku Photo Ind Co Ltd 磁気記録媒体の製造装置
US4999015A (en) * 1988-05-27 1991-03-12 Demaris Elbert E High speed rotational dispersion device using short shear path
US5403092A (en) * 1994-02-01 1995-04-04 Eastman Kodak Company Viscous shear mixing device and method
DE19749315A1 (de) * 1997-11-07 1999-05-12 Emtec Magnetics Gmbh Verfahren zur Herstellung einer Magnetdispersion für Magnetaufzeichnungsträger und damit hergestellter Magnetaufzeichnungsträger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134053A1 (fr) * 1971-04-22 1972-12-01 Basf Ag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL271335A (fr) *
US2929107A (en) * 1954-11-22 1960-03-22 Olin Mathieson Treatment of plastics
DE2403053A1 (de) * 1974-01-23 1975-07-31 Supraton Auer & Zucker Einrichtung zur herstellung einer suspension aus hochquellfaehigen stoffen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134053A1 (fr) * 1971-04-22 1972-12-01 Basf Ag

Also Published As

Publication number Publication date
US4201486A (en) 1980-05-06
JPS6044726B2 (ja) 1985-10-05
NL181608C (nl) 1987-09-16
GB1599712A (en) 1981-10-07
DE2722078A1 (de) 1978-11-23
FR2391526B1 (fr) 1982-06-25
NL7804420A (nl) 1978-11-20
DE2722078C3 (de) 1980-07-10
JPS53141604A (en) 1978-12-09
DE2722078B2 (de) 1979-10-31

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Legal Events

Date Code Title Description
ST Notification of lapse