| Patent Number |
Title Of Patent |
Date Issued |
| 5344730 |
Method of recording information on a photographic film |
September 6, 1994 |
| A method of recording information relating to an image photographed on a photographic film in which the photographic film comprises a magnetic track associated with each image frame for magnetically recording the information. Each magnetic track has two or more fields. The information |
| 4982302 |
Magnetic recording medium and method for magnetic recording and reproduction |
January 1, 1991 |
| A method for magnetic recording and reproduction comprising the steps of: (1) magnetically multiple-recording signals on a magnetic recording medium comprising a support having thereon an upper magnetic recording layer comprising barium ferrite having an increased coercive force at 60.de |
| 4876022 |
Method for preparing ferromagnetic iron oxide particles |
October 24, 1989 |
| A method for preparing ferromagnetic iron oxide particles comprising the steps of depositing Co-ferrite fine particles onto the surface of acicular iron oxyhydroxide particles and then calcining said acicular iron oxyhydroxide having said C0-ferrite fine particles deposited thereon. |
| 4875610 |
Method of and system for driving magnetic tape |
October 24, 1989 |
| A unidirectional traveling-surface-wave by ultrasonic oscillation is generated on a surface of an oscillator, and a magnetic tape is run in the direction opposite to the traveling direction of the surface wave by pressing the surface of the oscillator against a surface of the magnetic |
| 4713261 |
Method for preparing ferromagnetic iron oxide particles |
December 15, 1987 |
| A method for preparing ferromagnetic iron oxide particles is described, which comprises depositing a cobalt compound onto a surface of lepidocrostie (.gamma.-FeOOH) particles, and then calcining the particles at 150.degree. to 350.degree. C. |
| 4700198 |
Process for recording information by irradiation of, an deposition on, a substrate |
October 13, 1987 |
| A process for recording an information on a surface of a substrate, which includes steps of irradiating the substrate surface with radiation modulated according to the information to be recorded and subjecting the surface of the substrate to a deposition treatment to form deposited areas |
| 4678682 |
Process for producing magnetic recording medium |
July 7, 1987 |
| The perpendicular magnetic orientation of a magnetic layer containing platelet-form ferromagnetic particles coated on a web support is effectively performed by passing a web having thereon the coated magnetic layer in an undried state through a magnetic field formed by plural pairs o |
| 4666773 |
Magnetic recording medium |
May 19, 1987 |
| In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a binder, the ferromagnetic particles are given a magnetic anisotropy by a magnetic annealing treatment and the direction of |
| 4626315 |
Process of forming ultrafine pattern |
December 2, 1986 |
| A process for forming an ultrafine pattern on a surface of a substrate, which includes steps of irradiating the substrate surface with radiation modulated according to information to be patterned, subjecting the substrate surface to deposition with a material reactive or not with the |
| 4610903 |
Magneto-optical disk memory |
September 9, 1986 |
| A magneto-optical disk memory comprises a magneto-optical recording medium constituted by a flexible substrate, and a recording thin film overlaid on the substrate. The recording thin film is fabricated of an amorphous rare-earth transition metal alloy having the easy axis of magnetizati |
| 4608093 |
Ferromagnetic particles with stable magnetic characteristics and method of preparing same |
August 26, 1986 |
| Cobalt-free ferromagnetic particles are disclosed. The particles are comprised of ferromagnetic metal inner cores and an outer oxidized layer. The particles have a saturation magnetization of 60 to 100 emu/g and a coercive force of 500 Oe or more. The outer layer provides a means for |
| 4588656 |
Method of preparing a magnetic recording medium |
May 13, 1986 |
| A magnetic recording medium comprising a substrate, a thin magnetic metal film having spaced-apart columnar grains deposited on the substrate, and an organic polymer formed in the space between the columnar grains and integrated therewith. The medium is prepared by impregnating the space |
| 4588636 |
Magnetic recording medium |
May 13, 1986 |
| A magnetic recording medium having a thin ferromagnetic metal film formed on a non-magnetic base by vacuum vapor deposition or ion plating is disclosed. The thin ferromagnetic metal film is based on Co and contains 0.05 to 3.0 wt % of Mg. |
| 4582746 |
Magnetic recording medium |
April 15, 1986 |
| Weather resistance and lubricity of a magnetic recording medium comprising a non-magnetic support having provided thereon a vapor deposited magnetic thin film mainly composed of cobalt, nickel and oxygen can be improved by limiting the amount of nickel and the number of oxygen atoms to a |
| 4581251 |
Process for producing cobalt-modified ferromagnetic iron oxide |
April 8, 1986 |
| A process for preparing cobalt-modified ferromagnetic iron oxide by modifying ferromagnetic .gamma.-Fe.sub.2 O.sub.3 particles with cobalt, wherein prior to cobalt modification treatment, the ferromagnetic .gamma.-Fe.sub.2 O.sub.3 is heat treated at a temperature in the range of from |
| 4576635 |
Process for producing ferromagnetic metal powder |
March 18, 1986 |
| A process for producing a ferromagnetic metal powder comprising treating acicular iron oxyhydroxide or an acicular metal oxyhydroxide composed mainly of iron with a silicon compound, dehydrating the treated material by heating the material in a non-reducing atmosphere to produce iron oxi |
| 4554089 |
Ferromagnetic particles with stable magnetic characteristics and method of preparing same |
November 19, 1985 |
| Cobalt-free ferromagnetic particles are disclosed. The particles are comprised of ferromagnetic metal inner cores and an outer oxidized layer. The particles have a saturation magnetization of 60 to 100 emu/g and a coercive force of 500 Oe or more. The outer layer provides a means for |
| 4547393 |
Method for preparing a magnetic recording medium |
October 15, 1985 |
| The present invention relates to an improved method for preparing a magnetic recording method having excellent magnetic orientation comprising the steps of (1) dispersing ferromagnetic fine particles which are plate-shaped and which have an axis of magnetization perpendicular to the |
| 4520069 |
Magnetic recording medium |
May 28, 1985 |
| In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a non-magnetic binder, an improvement consists in that the ferromagnetic particles have a mean particle length of at most 0.3 |
| 4515857 |
Magnetic recording medium |
May 7, 1985 |
| In a magnetic recording medium comprising a non-magnetic support and a magnetic recording layer coated thereon in which ferromagnetic particles are dispersed in a non-magnetic binder, the ferromagnetic particles are cubic particles of 0.3 or less micron and are subjected to an orientatio |
| 4513054 |
Magnetic recording medium |
April 23, 1985 |
| In a magnetic recording medium comprising a non-magnetic support and two or more magnetic recording layers containing ferromagnetic particles dispersed in a non-magnetic binder, the ferromagnetic particles of the outermost magnetic layer are given a main magnetic anisotropy by a magn |
| 4503119 |
Magnetic recording media |
March 5, 1985 |
| A magnetic recording medium which is characterized by a lubricant present in channels diagonally extending through a magnetic metal thin film having a columnar structure formed by vapor deposition; this medium possesses improved running properties and abrasion resistance which last for a |
| 4487627 |
Method for preparing ferromagnetic metal particles |
December 11, 1984 |
| A method for preparing ferromagnetic metal particles is disclosed. The method involves dehydrating oxyhydroxide particles comprised mainly of iron in a nonreducing gas under heating at a temperature of not more than 500.degree. C. to form oxide particles, providing silicon compounds on t |
| 4486496 |
Magnetic recording medium |
December 4, 1984 |
| A magnetic recording medium which comprises a non-magnetic support having thereon a magnetic layer containing plate-shaped magnetic particles which have axes of easy magnetization perpendicular to their respective plate planes dispersed in a binder, the magnetic particles each having a |
| 4482578 |
Method for preparing magnetic recording media |
November 13, 1984 |
| A method for preparing a magnetic recording medium comprising a non-magnetic support having coated thereon a magnetic layer containing plate-shaped ferromagnetic fine particles oriented perpendicular to a plane of the surface of the support, the process comprising the steps of:coating th |
| 4477489 |
Method of making magnetic recording medium |
October 16, 1984 |
| In a method of making a magnetic recording medium by causing a flow of vapor obtained by evaporating a magnetic metal deposition material to impinge and deposit on a moving substrate at an oblique angle with respect to the moving substrate, the substrate is moved so that the incident ang |
| 4475946 |
Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, |
October 9, 1984 |
| Ferromagnetic metal particles are disclosed, which have a silane compound on the surface thereof. The silane compound is represented by the formula:wherein R and R' each represent an alkyl group and n represents 2 or 3. The ferromagnetic metal particles have excellent oxidation stability and |
| 4448843 |
Magnetic recording medium |
May 15, 1984 |
| A magnetic recording medium is described wherein a layer comprising mainly a polyurethane resin, vinylidene chloride copolymer, or a cellulose derivative is formed on the surface of a vapor-deposited ferromagnetic metal layer on a substrate. |
| 4446816 |
Apparatus for manufacturing a magnetic recording medium |
May 8, 1984 |
| An apparatus for manufacturing a magnetic recording medium using vacuum-deposition from an evaporated metal source having a very high efficiency and uniform deposition. The support onto which the magnetic film is to be evaporated is guided and conveyed along a curved path above a mol |
| 4442159 |
Magnetic recording medium |
April 10, 1984 |
| A magnetic recording medium which comprises a non-magnetic support having thereon two or more magnetic layers comprising magnetic particles in a binder. The magnetic layer(s) other than the topmost layer comprises needle-shaped magnetic particles. The topmost layer comprises plate-shaped |
| 4439796 |
Magnetic recording medium |
March 27, 1984 |
| A magnetic recording medium is described having formed on a non-magnetic base at least two magnetic layers, each of the magnetic layers comprising ferromagnetic particles dispersed in a binder, wherein the ferromagnetic particles in the outermost magnetic layer are substantially cubic |
| 4439795 |
Magnetic recording medium |
March 27, 1984 |
| A magnetic recording medium is described having formed on a non-magnetic base at least two magnetic layers, each of the magnetic layers comprising ferromagnetic particles dispersed in a binder, wherein the ferromagnetic particles in the outermost layer have an average length of 0.3.mu. o |
| 4437882 |
Ferromagnetic powder treated with an organic silane compound |
March 20, 1984 |
| A ferromagnetic powder and process for producing it are disclosed. The process involves providing reducing a nickel-doped or nickel-coated iron compound in a reducing gas to provide a reduced metal powder including nickel in an amount of 3 to 30 atomic % based on the atomic % of iron |
| 4414271 |
Magnetic recording medium and method of preparation thereof |
November 8, 1983 |
| A magnetic recording medium comprising a substrate, a thin magnetic metal film having spaced-apart columnar grains deposited on the substrate, and a crosslinked organic polymer formed from a polymerizable organic compound and a curing agent in the spaces between the columnar grains and |
| 4414270 |
Magnetic recording medium |
November 8, 1983 |
| A magnetic recording medium comprising a magnetic layer on one surface of a non-magnetic base and a back coating on the other surface thereof which is not thicker than 2.mu. and which contains inorganic particles and a binder is disclosed. The inorganic particles have an average size bet |
| 4412507 |
Magnetic recording medium manufacturing device |
November 1, 1983 |
| A magnetic recording medium manufacturing device in which a flexible belt-shaped support is conveyed above a molten metal vaporizing source substantially at a constant speed while a magnetic film is formed on a surface of the support by vacuum deposition. The support is guided by tra |
| 4410565 |
Method of making a magnetic recording medium |
October 18, 1983 |
| A magnetic recording medium comprising a substrate, a thermoplastic prime coat provided thereon, and a ferromagnetic metal layer having columnar grains which at least partially penetrate into the prime coat from the top thereof and are integrated therewith. The medium is prepared by appl |
| 4409281 |
Magnetic recording medium |
October 11, 1983 |
| A magnetic recording medium is described comprising a first layer comprising a magnetic iron oxide powder dispersed in a binder formed on a nonmagnetic support, a second layer formed on the first layer comprising a ferromagnetic metal powder dispersed in a binder, and having a greater |
| 4395439 |
Method of manufacturing magnetic recording medium |
July 26, 1983 |
| A method and apparatus for manufacturing a magnetic recording medium using vacuum-deposition from an evaporated metal source having a very high efficiency and uniform deposition. The support onto which the magnetic film is to be evaporated is guided and conveyed along a curved path above |
| 4368237 |
Process for producing magnetic recording device |
January 11, 1983 |
| A magnetic recording material having superior abrasion resistance and thermal stability is produced by coating a magnetic coating composition consisting essentially of aqueous emulsions of at least two resin binders capable of reacting with each other upon mixing, and being present there |
| 4354908 |
Process for the production of magnetic recording members |
October 19, 1982 |
| A process for the production of a magnetic recording member which comprises effecting electric field vapor deposition under conditions such that the angle of incidence at which the vapor beam of a ferromagnetic metal strikes a support is at least about 50.degree. and the electric field |
| 4333988 |
Magnetic recording media |
June 8, 1982 |
| A recording medium and, more particularly, a recording medium based on a composition exhibiting high dispersibility for finely-divided ferromagnetic powders having excellent abrasion resistance is disclosed in which the magnetic composition comprises a finely-divided ferromagnetic po |
| 4333985 |
Magnetic recording medium |
June 8, 1982 |
| A magnetic recording medium is described comprising a protective layer including at least one substance selected from the group consisting of poly(paraxylylene), poly(monochloroparaxylylene), and poly(dichloroparaxylylene) formed on a magnetic recording layer comprising a thin ferrom |
| 4286299 |
Magnetic head assembly for recording or reproducing vertically magnetized records |
August 25, 1981 |
| A magnetic head assembly for recording and playing back information on a recording medium in a vertically magnetized mode. Main and auxiliary heads are provided opposite one another with the recording medium passing therebetween. The main head includes a core of material exhibiting a |
| 4267207 |
Process for producing cobalt-containing ferromagnetic iron oxide powder |
May 12, 1981 |
| A process for producing a cobalt-containing ferromagnetic iron oxide powder suitable for magnetic recording which comprises(a) mixing cobalt ion, ferrous ion and an alkali with an aqueous dispersion of acicular ferromagnetic iron oxide nuclei under non-oxidizing conditions at a temperatu |
| 4260466 |
Method of producing magnetic recording medium |
April 7, 1981 |
| A method of producing a magnetic recording layer on a support comprising simultaneously depositing a ferromagnetic material and a polymer on a support using a vapor deposition technique such as vacuum deposition, sputtering, etc., thereby to produce thereon a magnetic recording layer of |
| 4251843 |
Disc jacket for retaining magnetic recording disc |
February 17, 1981 |
| The inner surface of a disc jacket for retaining a magnetic recording disc is provided with a fibrous layer containing an antistatic agent. The fibrous layer is composed of a nonwoven cloth impregnated with the antistatic agent. The antistatic agent may be applied to the nonwoven clo |
| 4250225 |
Process for the production of a magnetic recording medium |
February 10, 1981 |
| A magnetic recording medium excellent in adhesiveness and surface property is produced by a process comprising treating the surface of a plastic substrate by glow discharge, then subjecting the substrate to a surface activating treatment and forming a magnetic metallic plating layer on t |
| 4241368 |
Magnetic sheet recorder with a magnetic sheet surface treating means |
December 23, 1980 |
| In a magnetic sheet recorder, a scraping member is mounted in association with a magnetic head to be put into contact with the magnetic layer of a magnetic sheet together with the magnetic head. The scraping member is mounted ahead of the head so as to treat the recording track of the |
| 4226681 |
Process for the production of a magnetic recording medium |
October 7, 1980 |
| This invention relates to a process for the production of a magnetic recording medium, which comprises heating a substrate or subbing layer containing copper as a main component at a temperature of about 100.degree. to 350.degree. C. and, at the same time, vapor depositing in vacuum |
