FR2391526A1 - Procede et dispositif pour la fabrication de supports d'enregistrements magnetiques - Google Patents
Procede et dispositif pour la fabrication de supports d'enregistrements magnetiquesInfo
- 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
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 :
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2134053A1 (fr) * | 1971-04-22 | 1972-12-01 | Basf Ag |
Family Cites Families (3)
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 |
-
1977
- 1977-05-16 DE DE2722078A patent/DE2722078C3/de not_active Expired
-
1978
- 1978-04-25 NL NLAANVRAGE7804420,A patent/NL181608C/xx not_active IP Right Cessation
- 1978-05-11 US US05/905,040 patent/US4201486A/en not_active Expired - Lifetime
- 1978-05-15 GB GB19562/78A patent/GB1599712A/en not_active Expired
- 1978-05-15 JP JP53056700A patent/JPS6044726B2/ja not_active Expired
- 1978-05-16 FR FR7814420A patent/FR2391526B1/fr not_active Expired
Patent Citations (1)
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 |