GB1416200A - Process and apparatus for the production of magnetic recording meida - Google Patents
Process and apparatus for the production of magnetic recording meidaInfo
- Publication number
- GB1416200A GB1416200A GB5664072A GB5664072A GB1416200A GB 1416200 A GB1416200 A GB 1416200A GB 5664072 A GB5664072 A GB 5664072A GB 5664072 A GB5664072 A GB 5664072A GB 1416200 A GB1416200 A GB 1416200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- support
- drying
- flat surface
- dispersion
- 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
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)
- Hard Magnetic Materials (AREA)
Abstract
1416200 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 8 Dec 1972 [9 Dec 1971] 56640/72 Heading B2E [Also in Division Dl] A process for the production of a magnetic recording medium comprises applying a layer of a fluid magnetic dispersion of uniaxially shaped magnetically anisotropic particles to a moving non-magnetisable support on a flat surface, orienting the magnetically anisotropic particles in the still fluid magnetic dispersion in a preferred direction parallel to the flat surface of the support using a uniform magnetic field whose lines of force are parallel to the flat surface and drying the dispersion at least partially within the magnetic field to form a coating and lock the magnetic particles in their oriented positions, the drying being effected at least predominantly by the preferential absorption of electromagnetic radiation by said layer compared with said support. The support may be a web of tape of a disc. The electro-magnetic radiation may be in a wavelength ranged from 0.1 to 11 u or 1 to 100 cm. The drying may be completed in the magnetic field. The magnetic dispersions may contain, in addition to the magnetic particles which may be gamma-iron (III) oxide, chromium dioxide, finely divided magnetite or ferro-magnetic metal pigments, the following binders such as epoxy resins, phenoxy resins, aminoplast precondensates, polyester resins, polyurethanes or polyurethaneforming compounds, polycarbonates, vinyl chloride and vinylidene chloride copolymers, heat-curable acrylate or methacrylate copolymers. Dispersions may contain volatile solvents such as tetrahydrofuran, toluene and methylethyl ketone. The magnetic tapes may be of cellulose acetate, polyester or polyvinyl chloride and are preferably of polyethylene terephthalate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712161083 DE2161083A1 (en) | 1971-12-09 | 1971-12-09 | METHOD AND DEVICE FOR PRODUCING TAPE-SHAPED MAGNETOGRAM CARRIERS |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1416200A true GB1416200A (en) | 1975-12-03 |
Family
ID=5827499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5664072A Expired GB1416200A (en) | 1971-12-09 | 1972-12-08 | Process and apparatus for the production of magnetic recording meida |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS4866402A (en) |
BR (1) | BR7208674D0 (en) |
CA (1) | CA988787A (en) |
DE (1) | DE2161083A1 (en) |
FR (1) | FR2162608A1 (en) |
GB (1) | GB1416200A (en) |
IT (1) | IT973973B (en) |
NL (1) | NL7216641A (en) |
PL (1) | PL79152B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0147746A2 (en) * | 1983-12-16 | 1985-07-10 | Nissin-High Voltage Co., Ltd. | Electron beam irradiation apparatus |
US4578280A (en) * | 1983-03-08 | 1986-03-25 | Agfa-Gevaert Aktiengesellschaft | Process for the production of a magnetic recording material with perpendicular orientation |
US4645686A (en) * | 1983-11-10 | 1987-02-24 | Bellmatic, Ltd. | Method for smoothing magnetic recording media |
US4678682A (en) * | 1982-05-20 | 1987-07-07 | Fuji Photo Film Co., Ltd. | Process for producing magnetic recording medium |
US4696831A (en) * | 1985-02-14 | 1987-09-29 | Hitachi, Ltd. | Method of orienting magnetic disc by magnetic field |
US4874633A (en) * | 1985-10-18 | 1989-10-17 | Fuji Photo Film Co., Ltd. | Method of producing magnetic recording medium |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52141612A (en) * | 1976-05-20 | 1977-11-26 | Hitachi Maxell | Method of producing magnetic recording media |
JPS5410205U (en) * | 1977-06-24 | 1979-01-23 | ||
DE2741341B2 (en) * | 1977-09-14 | 1980-02-14 | Basf Ag, 6700 Ludwigshafen | Process for the production of magnetic recording media |
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 |
DE3010873A1 (en) * | 1980-03-21 | 1981-10-01 | Basf Ag, 6700 Ludwigshafen | MAGNETIZING DEVICE FOR GENERATING A MAGNETIC PREFERRED DIRECTION IN MAGNETIC RECORDING CARRIERS |
JPS57113657U (en) * | 1980-12-29 | 1982-07-14 | ||
EP0094452A3 (en) * | 1982-05-19 | 1986-01-02 | International Business Machines Corporation | Production of magnetic recording medium with vertically oriented acicular particles |
JPH06103530B2 (en) * | 1982-05-20 | 1994-12-14 | 富士写真フイルム株式会社 | Manufacturing method of magnetic recording medium |
JPH0656656B2 (en) * | 1983-10-03 | 1994-07-27 | 富士写真フイルム株式会社 | Method of manufacturing magnetic recording medium |
-
1971
- 1971-12-09 DE DE19712161083 patent/DE2161083A1/en active Pending
-
1972
- 1972-12-07 JP JP47122102A patent/JPS4866402A/ja active Pending
- 1972-12-07 NL NL7216641A patent/NL7216641A/xx unknown
- 1972-12-07 PL PL15936372A patent/PL79152B1/pl unknown
- 1972-12-07 IT IT5458172A patent/IT973973B/en active
- 1972-12-08 GB GB5664072A patent/GB1416200A/en not_active Expired
- 1972-12-08 FR FR7243809A patent/FR2162608A1/fr not_active Withdrawn
- 1972-12-08 BR BR867472A patent/BR7208674D0/en unknown
- 1972-12-11 CA CA159,037A patent/CA988787A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4678682A (en) * | 1982-05-20 | 1987-07-07 | Fuji Photo Film Co., Ltd. | Process for producing magnetic recording medium |
US4578280A (en) * | 1983-03-08 | 1986-03-25 | Agfa-Gevaert Aktiengesellschaft | Process for the production of a magnetic recording material with perpendicular orientation |
US4645686A (en) * | 1983-11-10 | 1987-02-24 | Bellmatic, Ltd. | Method for smoothing magnetic recording media |
EP0147746A2 (en) * | 1983-12-16 | 1985-07-10 | Nissin-High Voltage Co., Ltd. | Electron beam irradiation apparatus |
EP0147746A3 (en) * | 1983-12-16 | 1987-01-07 | Nissin High-Voltage Co., Ltd. | Electron beam irradiation apparatus |
US4696831A (en) * | 1985-02-14 | 1987-09-29 | Hitachi, Ltd. | Method of orienting magnetic disc by magnetic field |
US4874633A (en) * | 1985-10-18 | 1989-10-17 | Fuji Photo Film Co., Ltd. | Method of producing magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS4866402A (en) | 1973-09-12 |
BR7208674D0 (en) | 1973-09-27 |
NL7216641A (en) | 1973-06-13 |
FR2162608A1 (en) | 1973-07-20 |
IT973973B (en) | 1974-06-10 |
PL79152B1 (en) | 1975-06-30 |
DE2161083A1 (en) | 1973-06-14 |
CA988787A (en) | 1976-05-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |