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公开(公告)号：US4141763A
公开(公告)日：1979-02-27
申请号：US784747
申请日：1977-04-05
申请人： Masashi Aonuma , Yasuo Tamai , Tatsuji Kitamoto , Fumio Kodama
发明人： Masashi Aonuma , Yasuo Tamai , Tatsuji Kitamoto , Fumio Kodama
摘要： A process for producing a ferromagnetic powder comprising injecting a stream of an aqueous solution of a metal salt capable of forming a ferromagnetic substance and a stream of solution containing a reducing material for mixing into a reaction chamber such that the two solutions impinge upon one another causing an oxidation-reduction reaction between them to occur, and applying a magnetic field of 50 oe or more to the particles produced by the oxidation-reduction reaction for the period during which the particles become ferromagnetic particles after going through a superparamagnetic state and an apparatus for use in the practice of the above process comprising a reaction vessel, at least one nozzle for injecting each of a solution of a metal salt and a solution containing a reducing material into the reaction vessel and a magnet for producing a magnetic field in the reaction vessel with the nozzles being open to the magnetic field and positioned so that the solution of the metal salt and the solution of the reducing material when injected are mixed.
摘要翻译： 一种制造铁磁粉末的方法，包括将能形成铁磁性物质的金属盐的水溶液流和含有还原材料的溶液流混合到反应室中，使得两种溶液彼此撞击导致 在它们之间发生氧化还原反应，并且在通过超顺磁性状态的颗粒变成铁磁颗粒的时期之后，对由氧化还原反应产生的颗粒施加50ee或更大的磁场， 用于上述方法的实践中，包括反应容器，用于将金属盐溶液和含有还原材料的溶液中的每一个注入反应容器的至少一个喷嘴和用于在反应容器中产生磁场的磁体 其中喷嘴对磁场开放并且定位成使得金属盐a的溶液 并且当注入时将还原材料的溶液混合。
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公开(公告)号：US4108739A
公开(公告)日：1978-08-22
申请号：US786926
申请日：1977-04-12
申请人： Eiichi Tadokoro , Tatsuji Kitamoto
发明人： Eiichi Tadokoro , Tatsuji Kitamoto
CPC分类号： C25D5/10 , C25D3/562 , Y10S204/09
摘要： A method for electroplating in a single electroplating bath comprising varying the electric current density so that a non-magnetic plated film and a ferromagnetic plated film are selectively deposited. To achieve this effect the electroplating bath must contain at least about 1 g/l NaH.sub.2 PO.sub.2.H.sub.2 O.
摘要翻译： 一种用于在单个电镀浴中电镀的方法，包括改变电流密度，使得非磁性镀膜和铁磁镀膜被选择性沉积。 为了达到这个效果，电镀浴必须含有至少约1g / l NaH 2 PO 2·H 2 O.
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公开(公告)号：US4097650A
公开(公告)日：1978-06-27
申请号：US717323
申请日：1976-08-24
CPC分类号： G11B5/656 , H01F10/28 , Y10S428/90 , Y10T428/265 , Y10T428/266 , Y10T428/269 , Y10T428/31
摘要： This invention relates to a magnetic recording medium comprising a ferromagnetic metal thin film as a magnetic recording layer on a non-magnetic flexible support, in which the surface roughness of the support is 0.10 .mu.m or less and the period of the surface roughness is v/10.sup.6 .mu.m or less where v represents a relative speed between a magnetic head and magnetic recording medium by .mu.m/sec. In the case of providing an undercoated layer between the magnetic recording layer and non-magnetic flexible support, the surface roughness of the undercoated layer is adjusted to 0.10 .mu.m or less and the period of the surface roughness is adjusted to v/10.sup.6 .mu.m or less.
摘要翻译： 本发明涉及一种磁性记录介质，其包括在非磁性柔性载体上作为磁记录层的强磁性金属薄膜，其中载体的表面粗糙度为0.10μm或更小，并且表面粗糙度的周期为v /106μm或更小，其中v表示磁头和磁记录介质之间的相对速度，单位为m / sec。 在磁记录层和非磁性柔性载体之间设置底涂层的情况下，将底涂层的表面粗糙度调整为0.10μm以下，将表面粗糙度的周期调整为v /106μm 或更少。
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公开(公告)号：US4086374A
公开(公告)日：1978-04-25
申请号：US680418
申请日：1976-04-26
CPC分类号： H01F41/14
摘要： An improved method of making a magnetic recording material comprises providing a ferromagnetic metal thin layer which has uniaxial anisotropy in any direction on a web by means of plating.A plating solution is jetted onto the web through holes in a conveying pipe set in a plating bath. The web is then moved from the vicinity of the conveying pipe by the spouting force of the plating solution, and then conveyed along a helical path about the conveying pipe without contacting the surface of conveying pipe. Plating occurs while applying a magnetic field to the web.
摘要翻译： 制造磁记录材料的改进方法包括通过电镀提供在卷材上沿任何方向具有单轴各向异性的强磁性金属薄层。
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55.发明授权
公开(公告)号：US4066564A
公开(公告)日：1978-01-03
申请号：US702171
申请日：1976-07-02
CPC分类号： G11B5/70694 , C01G49/06 , C01G49/08 , G11B5/70673 , G11B5/70689 , C01P2006/42
摘要： A Co- and Fe-containing ferromagnetic iron oxide powder having a high coercive force and improved stability to heat and pressure is produced by adding an aqueous alkali solution, an aqueous solution containing Co.sup.+2 ions, and an aqueous solution containing not more than 1 equivalent, based on the Co.sup.+2 ions, of Fe ions to a suspension of ferromagnetic iron oxide, and heating the mixture at a temperature of at least 80.degree. C in the presence of an oxidizing agent. The ferromagnetic iron oxide powder is especially suitable for producing magnetic recording media.
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公开(公告)号：US4059463A
公开(公告)日：1977-11-22
申请号：US693669
申请日：1976-06-07
申请人： Masashi Aonuma , Tatsuji Kitamoto , Goro Akashi
发明人： Masashi Aonuma , Tatsuji Kitamoto , Goro Akashi
摘要： Ferromagnetic powders comprising cobalt and/or nickel are produced by reducing cobalt and/or nickel salts in an aqueous solution containing hypophosphite ions while applying a magnetic field.
摘要翻译： 包含钴和/或镍的铁磁粉末通过在施加磁场的同时还原包含次磷酸根离子的水溶液中的钴和/或镍盐来制备。
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57.发明授权Process for stabilization of ferromagnetic material and magnetic recording member 失效强磁性材料和磁记录元件的稳定化工艺
公开(公告)号：US4015030A
公开(公告)日：1977-03-29
申请号：US591681
申请日：1975-06-30
申请人： Koji Sasazawa , Yasuyuki Yamada , Tatsuji Kitamoto , Goro Akashi
发明人： Koji Sasazawa , Yasuyuki Yamada , Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/70694
摘要： A process for stabilizing a ferromagnetic material comprising heat-treating a needle-like ferromagnetic material represented by the formula MO.sub.x wherein M is a ferromagnetic metal ion or a ferromagnetic non-metal ion and another metal ion, and x is the degree of oxidation which ranges from 1.36 to 1.47, and containing at least 0.5 atom % Co, at a temperature of at least about 40.degree. C, and a process for stabilizing a magnetic recording member comprising heat-treating a magnetic recording member produced by providing a ferromagnetic recording layer comprising (a) a ferromagnetic material represented by the formula MO.sub.x wherein M and x are the same as defined above, and containing at least 0.5 atom % Co, and (b) a binder, on a support, at a temperature of at least about 40.degree. C.
摘要翻译： 一种用于稳定铁磁材料的方法，包括热处理由式MOx表示的针状铁磁材料，其中M是铁磁金属离子或铁磁性非金属离子和另一种金属离子，x是氧化程度 1.36至1.47，并且在至少约40℃的温度下含有至少0.5原子％的Co，以及用于稳定磁性记录元件的方法，该方法包括热处理通过提供铁磁性记录层产生的磁性记录元件，所述磁性记录元件包括 （a）由式MOx表示的铁磁材料，其中M和x与上述定义相同，并且在载体上至少包含至少约40的温度下含有至少0.5原子％的Co和（b）粘合剂 DEG C.
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公开(公告)号：US4002546A
公开(公告)日：1977-01-11
申请号：US639493
申请日：1975-12-10
IPC分类号： G11B5/66 , C22C19/07 , C23C14/00 , C23C14/14 , C23C14/24 , G11B5/64 , G11B5/73 , G11B5/85 , H01F10/16 , H01F41/14 , H01F41/20 , C23C15/00 , B05D5/12
CPC分类号： C23C14/14 , H01F41/14 , Y10T428/31678
摘要： An improved method of making a magnetic recording medium with excellent coercive force and rectangular ratio is provided by means of an ion plating technique. A support and an evaporation source of a magnetic Co-Si alloy are placed in an ion plating apparatus which is filled with an inert gas and kept at low vacuum. High voltage is then applied between the support and the evaporation source such that the former has a negative polarity and the latter a positive polarity, thereby causing a glow discharge zone in the apparatus. The magnetic alloy is evaporated into the glow discharge zone from the source to form a magnetic thin film on the support. Such a magnetic thin film can have a coercive force of 750 Oe or more and a rectangular ratio of 0.80 or more and can be used as a magnetic recording medium.
摘要翻译： 通过离子镀技术提供了制备具有优良矫顽力和矩形比的磁记录介质的改进方法。 将磁性Co-Si合金的载体和蒸发源放置在填充有惰性气体并保持在低真空下的离子镀装置中。 然后在支撑体和蒸发源之间施加高电压，使得前者具有负极性，后者为正极性，从而在装置中形成辉光放电区。 磁性合金从源极蒸发到辉光放电区，在支撑体上形成磁性薄膜。 这种磁性薄膜可以具有750Oe以上的矫顽力和0.80以上的矩形比，并且可以用作磁记录介质。
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59.发明授权Recording member comprising a substrate with a magnetic lager on one surface and a lubricating lager on the opposed surface 失效记录构件包括在一个表面上具有磁性沉积物的基底和相对表面上的润滑剂
公开(公告)号：US3993824A
公开(公告)日：1976-11-23
申请号：US550685
申请日：1975-02-18
IPC分类号： G11B5/66 , C09D5/23 , G11B5/64 , G11B5/725 , G11B5/73 , G11B5/735 , B32B5/00 , B32B27/18 , G03G5/10
CPC分类号： G11B5/725 , Y10S428/90 , Y10T428/24975 , Y10T428/265 , Y10T428/269 , Y10T428/31678
摘要： A magnetic recording member comprising a non-magnetic support having a magnetic recording layer on one side of the non-magnetic support and a lubricating layer on the other side of the non-magnetic support in which the lubricating layer comprises a liquid or semi-solid lubricant or a liquid or semi-solid lubricant, and an organic binder.
摘要翻译： 一种磁记录部件，包括在非磁性载体的一侧具有磁记录层的非磁性载体和在非磁性载体的另一侧的润滑层，其中润滑层包含液体或半固体 润滑剂或液体或半固体润滑剂和有机粘合剂。
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公开(公告)号：US5344730A
公开(公告)日：1994-09-06
申请号：US82906
申请日：1993-06-29
申请人： Tatsuji Kitamoto
发明人： Tatsuji Kitamoto
CPC分类号： G03C5/14 , G03C11/02 , G03B2217/244 , G03C2200/10
摘要： 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 is divided into sections which are each recorded onto any of the fields together with a start signal, an end signal, and an error detection and/or correction signal for each the information section. Consequently, even if the information to be recorded for each image frame is interrupted due to an error in the conveying speed of the film, a portion of the information can be read and utilized.
摘要翻译： 一种记录与摄影胶片拍摄的图像有关的信息的方法，其中摄影胶片包括与每个图像帧相关联的磁道，用于磁记录信息。 每个磁道都有两个或更多个磁场。 该信息被分成各个记录在任何一个场上的部分，以及每个信息部分的起始信号，结束信号和错误检测和/或校正信号。 因此，即使由于胶片的传送速度的错误而使每个图像帧记录的信息被中断，所以可以读取和使用一部分信息。
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