GB1417442A - Method of making magnetic recording materials and materials made thereby - Google Patents
Method of making magnetic recording materials and materials made therebyInfo
- Publication number
- GB1417442A GB1417442A GB873273A GB873273A GB1417442A GB 1417442 A GB1417442 A GB 1417442A GB 873273 A GB873273 A GB 873273A GB 873273 A GB873273 A GB 873273A GB 1417442 A GB1417442 A GB 1417442A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- viscous
- layers
- vinylidene chloride
- support
- 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
- 230000005291 magnetic effect Effects 0.000 title abstract 8
- 239000000463 material Substances 0.000 title abstract 7
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 238000000576 coating method Methods 0.000 abstract 5
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 abstract 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 abstract 3
- 239000011230 binding agent Substances 0.000 abstract 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 239000008199 coating composition Substances 0.000 abstract 2
- 229920001577 copolymer Polymers 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 abstract 2
- 229920000728 polyester Polymers 0.000 abstract 2
- -1 polyethylene terephthalate Polymers 0.000 abstract 2
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 2
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 abstract 1
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 abstract 1
- 150000001241 acetals Chemical class 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 150000008064 anhydrides Chemical class 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229920002301 cellulose acetate Polymers 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000011651 chromium Substances 0.000 abstract 1
- 229940090961 chromium dioxide Drugs 0.000 abstract 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 abstract 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 239000008119 colloidal silica Substances 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 1
- 239000012948 isocyanate Substances 0.000 abstract 1
- 150000002513 isocyanates Chemical class 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000006249 magnetic particle Substances 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 229910001092 metal group alloy Inorganic materials 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 229920000515 polycarbonate Polymers 0.000 abstract 1
- 239000004417 polycarbonate Substances 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 abstract 1
- 239000004814 polyurethane Substances 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling drums
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
- G03C2001/7481—Coating simultaneously multiple layers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Paints Or Removers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Magnetic Record Carriers (AREA)
- Laminated Bodies (AREA)
Abstract
1417442 Magnetic recording materials EASTMAN KODAK CO 22 Feb 1973 [24 Feb 1972 9 Feb 1973] 8732/73 Heading B2E A method of making a magnetic recording material (e.g. a flexible disc, belt, sheet or tape) comprises coating a non-magnetisable support with two superimposed layers of viscous liquid-containing magnetic coating compositions and then causing the layers to solidify. A less viscous subbing coating may be present between the support and the magnetic coatings and may comprise a viscous solution of polyvinylbutyral or copolymers of: vinylidene chloride/acrylonitrile; vinyl acetate/ vinyl chloride partially hydrolised and optionally cross linked with a isocyanate; or vinylidene chloride/acrylonitrile/acrylic acid. The viscous magnetic coating compositions may comprise 'the anisotropic magnetic particles of different coercivities, but the same material in a solution of a binder which may be the same in both layers. The magnetic material is typically ferromagnetic iron oxide (e.g. magnetite or gamma ferric oxide), complex oxides of iron and cobalt, chromium dioxide, ferrites, or magnetic metal alloys. Preferred is acicular gamma ferric oxide which is doped with a polyvalent metal such as Co, Ni, Zn, Mn or Cr. Useful binders are: polyvinylbutyral; polyesters e.g. polyethylene terephthalate: polyurethanes; or copolymers of vinyl acetate/vinyl chloride, vinylidene chloride/acrylonitrile, acrylic/methacrylic esters, butadiene/styrene, vinylidene chloride/maleic or maleamid anhydride, cross linked or not cross linked; or mixtures thereof. The binder solution may also contain conventional additives, carbon for conductivity to avoid static and colloidal silica being mentioned. To apply the coatings the viscous magnetic coatings are cast on a layer of the less subbing layer. The layers then slide down a chute Imbricated by the less viscous subbing layer onto a support. Suitable film tape support material is cellulose nitrate or acetate, polyvinyl acetal, polystyrene, polycarbonate, or polyester such as polyethylene terephthalate, and may be biaxially or asymmetrically stretched. Other materials such as paper or metals (e.g. aluminium or brass) may be used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7206203A FR2172838B1 (en) | 1972-02-24 | 1972-02-24 | |
| FR7304704A FR2217758B1 (en) | 1972-02-24 | 1973-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1417442A true GB1417442A (en) | 1975-12-10 |
Family
ID=26216929
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB873273A Expired GB1417442A (en) | 1972-02-24 | 1973-02-22 | Method of making magnetic recording materials and materials made thereby |
| GB873173A Expired GB1417765A (en) | 1972-02-24 | 1973-02-22 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB873173A Expired GB1417765A (en) | 1972-02-24 | 1973-02-22 |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5612937B2 (en) |
| BE (1) | BE795896A (en) |
| CA (1) | CA1048865A (en) |
| DE (2) | DE2309158C3 (en) |
| FR (2) | FR2172838B1 (en) |
| GB (2) | GB1417442A (en) |
| IT (1) | IT979420B (en) |
| NL (2) | NL7302674A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6070519A (en) * | 1983-09-28 | 1985-04-22 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| US5756148A (en) * | 1991-01-21 | 1998-05-26 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| EP0838267A3 (en) * | 1996-07-30 | 1998-06-03 | Eastman Kodak Company | Improved high speed coating starts using a shear thinning top layer |
| US5827600A (en) | 1991-01-21 | 1998-10-27 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6096406A (en) | 1997-07-15 | 2000-08-01 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6203934B1 (en) | 1997-10-14 | 2001-03-20 | Fui Photo Film Co., Ltd. | Magnetic recording medium |
| US6254964B1 (en) | 1997-02-10 | 2001-07-03 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6291052B1 (en) | 1997-06-30 | 2001-09-18 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6316077B1 (en) | 1998-06-22 | 2001-11-13 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6432503B2 (en) | 1997-03-31 | 2002-08-13 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6444290B1 (en) | 1998-06-11 | 2002-09-03 | Fuji Photo Film Co., Ltd. | Magnetic recording medium comprising a support containing a specific size filler and having a specific concentration of surface protrusions |
| US6579592B1 (en) | 1996-11-29 | 2003-06-17 | Fuji Photo Film Co., Ltd | Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity |
| US7259935B2 (en) | 2002-07-05 | 2007-08-21 | Hitachi Maxell, Ltd. | Magnetic tape including an intermediate layer consisting essentially of a binder |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1429260A (en) * | 1973-10-12 | 1976-03-24 | Ciba Geigy Ag | Coating apparatus |
| JPS5843815B2 (en) * | 1975-10-23 | 1983-09-29 | 富士写真フイルム株式会社 | Jikiki Loc Tape |
| US4001024A (en) * | 1976-03-22 | 1977-01-04 | Eastman Kodak Company | Method of multi-layer coating |
| DE2752895A1 (en) * | 1976-12-06 | 1978-06-08 | Emi Ltd | METHOD FOR PRODUCING A MATERIAL LAYER, THE SURFACE OF WHICH HAS A SCANABLE PATTERN, AS WELL AS A SECURITY DOCUMENT SYSTEM |
| US4113903A (en) * | 1977-05-27 | 1978-09-12 | Polaroid Corporation | Method of multilayer coating |
| GB2006977B (en) * | 1977-10-14 | 1982-02-24 | Eastman Kodak Co | Manufacture of coated paper |
| DE2801452C2 (en) * | 1978-01-13 | 1985-03-28 | Agfa-Gevaert Ag, 5090 Leverkusen | Magnetic recording material |
| JPS5856228A (en) * | 1981-09-28 | 1983-04-02 | Sony Corp | Magnetic recording medium |
| GB2118070B (en) * | 1981-09-28 | 1985-08-14 | Sony Corp | Magnetic recording medium |
| DE3238904A1 (en) * | 1982-10-21 | 1984-04-26 | Agfa-Gevaert Ag, 5090 Leverkusen | METHOD FOR THE MULTIPLE COATING OF MOVING RAILWAYS |
| DE3238905C2 (en) * | 1982-10-21 | 1986-01-23 | Agfa-Gevaert Ag, 5090 Leverkusen | Process for the multiple coating of moving objects or tracks |
| JPS59172142A (en) * | 1983-03-20 | 1984-09-28 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS59172144A (en) * | 1983-03-20 | 1984-09-28 | Hitachi Maxell Ltd | Magnetic recording medium |
| DE3339780A1 (en) * | 1983-11-03 | 1985-05-15 | Sandy Hill Corp., Hudson Falls, N.Y. | Apparatus for the application of a controllable layer of a saturation or coating medium by means of a free-falling curtain, and process therefor |
| JPS6292132A (en) * | 1985-10-18 | 1987-04-27 | Fuji Photo Film Co Ltd | Manufacture of magnetic recording medium |
| JPS62124631A (en) * | 1985-11-26 | 1987-06-05 | Fuji Photo Film Co Ltd | Coating method for magnetic recording medium |
| JPH0690786B2 (en) * | 1987-01-30 | 1994-11-14 | 富士写真フイルム株式会社 | Magnetic recording medium |
| DE3717882A1 (en) * | 1987-05-27 | 1988-12-08 | Basf Ag | METHOD FOR THE STRUCTUR-FREE APPLICATION OF DISPERSIONS ON FLEXIBLE CARRIER MATERIALS |
| JP2581569B2 (en) * | 1987-10-19 | 1997-02-12 | 富士写真フイルム株式会社 | Audio tape or video tape |
| JP2581570B2 (en) * | 1987-10-19 | 1997-02-12 | 富士写真フイルム株式会社 | Video magnetic recording media |
| JPH07119594B2 (en) * | 1988-07-01 | 1995-12-20 | 富士写真フイルム株式会社 | Method for measuring film thickness of magnetic recording medium |
| US5143758A (en) * | 1991-03-28 | 1992-09-01 | Eastman Kodak Company | Coating by means of a coating hopper with coating slots where the coating composition has a low slot reynolds number |
| EP0520155B2 (en) † | 1991-04-25 | 2004-10-27 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| JP2566096B2 (en) † | 1992-04-14 | 1996-12-25 | 富士写真フイルム株式会社 | Magnetic recording media |
| DE4234608C2 (en) * | 1992-08-07 | 1997-08-07 | Basf Magnetics Gmbh | Process for producing a magnetic recording medium |
| DE4226139A1 (en) * | 1992-08-07 | 1994-02-10 | Basf Magnetics Gmbh | Coating system for producing a magnetic recording tape - comprises a multi-slot extruder caster arranged to coat a moving film base with a magnetic multilayer which is exposed to a magnetic field |
| US5932330A (en) * | 1993-09-30 | 1999-08-03 | Imation Corp. | Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium |
| US6030695A (en) * | 1996-03-28 | 2000-02-29 | Imation Corp. | Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium |
| JPH10290946A (en) | 1997-02-21 | 1998-11-04 | Konica Corp | Coating method and coating device |
| JPH11197576A (en) | 1998-01-08 | 1999-07-27 | Konica Corp | Coater and coating method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH131599A (en) * | 1927-02-05 | 1929-02-28 | Nuera Art Silk Company Limited | Process for the production of cellulosic pellets, tapes and films. |
| FR1270371A (en) * | 1960-10-14 | 1961-08-25 | Philips Nv | Process for the manufacture of articles intended for the recording and reproduction of magnetic inscriptions and articles thus manufactured |
| US3627564A (en) * | 1970-07-16 | 1971-12-14 | Eastman Kodak Co | Method for coating a continuous web |
-
0
- BE BE795896D patent/BE795896A/en unknown
-
1972
- 1972-02-24 FR FR7206203A patent/FR2172838B1/fr not_active Expired
-
1973
- 1973-02-09 FR FR7304704A patent/FR2217758B1/fr not_active Expired
- 1973-02-22 GB GB873273A patent/GB1417442A/en not_active Expired
- 1973-02-22 GB GB873173A patent/GB1417765A/en not_active Expired
- 1973-02-23 DE DE2309158A patent/DE2309158C3/en not_active Expired
- 1973-02-23 IT IT7320784A patent/IT979420B/en active
- 1973-02-23 CA CA73164476A patent/CA1048865A/en not_active Expired
- 1973-02-23 DE DE19732309159 patent/DE2309159A1/en not_active Withdrawn
- 1973-02-24 JP JP2260573A patent/JPS5612937B2/ja not_active Expired
- 1973-02-26 NL NL7302674A patent/NL7302674A/xx not_active Application Discontinuation
- 1973-02-26 NL NL7302673A patent/NL7302673A/xx not_active Application Discontinuation
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0471244B2 (en) * | 1983-09-28 | 1992-11-13 | Fuji Photo Film Co Ltd | |
| JPS6070519A (en) * | 1983-09-28 | 1985-04-22 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| US5985408A (en) | 1991-01-21 | 1999-11-16 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5756148A (en) * | 1991-01-21 | 1998-05-26 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6025082A (en) | 1991-01-21 | 2000-02-15 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5763046A (en) | 1991-01-21 | 1998-06-09 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6020022A (en) | 1991-01-21 | 2000-02-01 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5795646A (en) * | 1991-01-21 | 1998-08-18 | Fuji Photo Film Co. Ltd. | Magnetic recording medium |
| US5811166A (en) | 1991-01-21 | 1998-09-22 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5811172A (en) | 1991-01-21 | 1998-09-22 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5827600A (en) | 1991-01-21 | 1998-10-27 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5851622A (en) | 1991-01-21 | 1998-12-22 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5792543A (en) | 1991-04-25 | 1998-08-11 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US5780141A (en) | 1991-04-25 | 1998-07-14 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| EP0838267A3 (en) * | 1996-07-30 | 1998-06-03 | Eastman Kodak Company | Improved high speed coating starts using a shear thinning top layer |
| US6579592B1 (en) | 1996-11-29 | 2003-06-17 | Fuji Photo Film Co., Ltd | Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity |
| US6254964B1 (en) | 1997-02-10 | 2001-07-03 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6432503B2 (en) | 1997-03-31 | 2002-08-13 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6291052B1 (en) | 1997-06-30 | 2001-09-18 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6096406A (en) | 1997-07-15 | 2000-08-01 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US6203934B1 (en) | 1997-10-14 | 2001-03-20 | Fui Photo Film Co., Ltd. | Magnetic recording medium |
| US6444290B1 (en) | 1998-06-11 | 2002-09-03 | Fuji Photo Film Co., Ltd. | Magnetic recording medium comprising a support containing a specific size filler and having a specific concentration of surface protrusions |
| US6316077B1 (en) | 1998-06-22 | 2001-11-13 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
| US7259935B2 (en) | 2002-07-05 | 2007-08-21 | Hitachi Maxell, Ltd. | Magnetic tape including an intermediate layer consisting essentially of a binder |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1048865A (en) | 1979-02-20 |
| DE2309159A1 (en) | 1973-08-30 |
| JPS5612937B2 (en) | 1981-03-25 |
| DE2309158C3 (en) | 1981-06-11 |
| DE2309158B2 (en) | 1974-05-02 |
| NL7302673A (en) | 1973-08-28 |
| FR2217758A1 (en) | 1974-09-06 |
| IT979420B (en) | 1974-09-30 |
| FR2217758B1 (en) | 1976-11-05 |
| DE2309158A1 (en) | 1973-09-13 |
| GB1417765A (en) | 1975-12-17 |
| FR2172838B1 (en) | 1975-10-24 |
| NL7302674A (en) | 1973-08-28 |
| JPS4898803A (en) | 1973-12-14 |
| BE795896A (en) | 1973-08-23 |
| FR2172838A1 (en) | 1973-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 433D | Application made for revocation (sect. 33/1949) | ||
| 433C | Case decided by the comptroller ** specification amended (sect. 33/1949) | ||
| SPA | Amended specification published | ||
| PCNP | Patent ceased through non-payment of renewal fee |