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51. 发明授权

US5009929A Process for the preparation of magnetic recording medium 失效
标题翻译：磁记录介质的制备方法
公开(公告)号：US5009929A
公开(公告)日：1991-04-23
申请号：US533991
申请日：1990-03-26
申请人： Shinobu Iida , Masaaki Fujiyama , Keisuke Yamada
发明人： Shinobu Iida , Masaaki Fujiyama , Keisuke Yamada
IPC分类号： G11B5/84
CPC分类号： G11B5/84
摘要： A process for the preparation of a magnetic recording medium comprises the steps of subjecting a magnetic recording layer coated on a nonmagnetic support to surface smoothening treatment, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, and then abrading a surface of the magnetic recording layer by means of an abrasive tape.
摘要翻译：制备磁记录介质的方法包括以下步骤：将涂覆在非磁性载体上的磁记录层进行表面平滑处理，所述磁记录层包含分散在粘合剂中的铁磁性粉末，然后研磨磁性表面记录层。

52. 发明授权

US4937098A Method for manufacturing a magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4937098A
公开(公告)日：1990-06-26
申请号：US340743
申请日：1989-04-20
申请人： Yasuo Nishikawa , Mikio Ohno , Masaaki Fujiyama , Tsutomu Okita
发明人： Yasuo Nishikawa , Mikio Ohno , Masaaki Fujiyama , Tsutomu Okita
IPC分类号： G11B5/842 , G11B5/712 , H01F1/06
CPC分类号： G11B5/712 , Y10S428/90
摘要： A method for manufacturing a magnetic recording medium is disclosed, comprising ferromagnetic alloy powders having an average length in the long axis of 0.3 .mu.m or less and a specific surface area (BET Method) of 45 m.sup.2 /g or more, by steps which comprise surface-treating the ferromagnetic alloy powders with at least one triazine thiol compound, dispersing the surface-treated powders in a binder, and then coating the binder containing the surface-treated powders on a nonmagnetic support, wherein the ferromagnetic alloy powders are surface-treated with a triazine thiol compound represented by formula (I) in a condition in which the moisture content of the ferromagnetic alloy powders is 0.5 wt % or less, in a system of substantially excluded moisture: ##STR1## wherein R represents R.sub.1 O--, R.sub.1 S--, R.sub.1 NH--, or R.sub.1 R.sub.2 N--R.sub.1 --, R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl, alkenyl, aryl, aralkyl, cycloalkyl or alkanol group having from 1 to 18 carbon atoms, and M.sub.1 and M.sub.2, which may be the same or different, each represents H, alkali metal or ammonium.
摘要翻译：公开了一种磁记录介质的制造方法，其特征在于，包括长轴的平均长度为0.3μm以下，比表面积（BET法）为45m 2 / g以上的铁磁性合金粉末，用至少一种三嗪硫醇化合物对铁磁性合金粉末进行表面处理，将表面处理的粉末分散在粘合剂中，然后将含有表面处理粉末的粘合剂涂布在非磁性载体上，其中将铁磁性合金粉末进行表面处理在具有基本上排除的水分的体系中，在铁磁性合金粉末的水分含量为0.5重量％以下的条件下，由式（I）表示的三嗪硫醇化合物：其中R表示R 1 O- ，R1S-，R1NH-或R1R2N-R1，R1和R2可以相同或不同，表示具有1至18个碳原子的烷基，烯基，芳基，芳烷基，环烷基或链烷醇基，M1 和M2，w 其可以相同或不同，各自表示H，碱金属或铵。

53. 发明授权

US4780365A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4780365A
公开(公告)日：1988-10-25
申请号：US19286
申请日：1987-02-26
申请人： Yutaka Kakuishi , Kenichi Masuyama , Masaaki Fujiyama , Toshimitu Okutu
发明人： Yutaka Kakuishi , Kenichi Masuyama , Masaaki Fujiyama , Toshimitu Okutu
IPC分类号： C09D101/18 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/265
摘要： In a magnetic recording medium comprising a nonmagnetic support, a magnetic recording layer provided on one surface of said support and a back layer containing carbon black provided on another surface of said support, the improvement wherein said back layer has thickness of not larger than 0.6 .mu.m and contains an inorganic filler powder having a Mohs' scale of hardness of not less than 5, a mean particle diameter of smaller than the thickness of the back layer and not smaller than 1/5 of the thickness thereof, and the maximum particle diameter of not larger than 11/10 of the thickness of the back layer.
摘要翻译：在包括非磁性载体的磁记录介质中，设置在所述载体的一个表面上的磁记录层和设置在所述载体的另一表面上的含有炭黑的背层，其中所述背层的厚度不大于0.6μm 并且含有莫氏硬度不小于5的无机填料粉末，平均粒径小于背层厚度，不小于其厚度的1/5，最大粒径不大于背层厚度的11/10。

54. 发明授权

US4745001A Process for the preparation of magnetic recording medium 失效
标题翻译：磁记录介质的制备方法
公开(公告)号：US4745001A
公开(公告)日：1988-05-17
申请号：US7166
申请日：1987-01-27
申请人： Takahito Miyoshi , Masaaki Fujiyama
发明人： Takahito Miyoshi , Masaaki Fujiyama
IPC分类号： G11B5/708 , G11B5/845 , H01F10/02
CPC分类号： G11B5/845 , G11B5/708
摘要： Improvement in a process for the preparation of a magnetic recording medium which comprises the steps of applying a magnetic paint onto a surface of a nonmagnetic support to form a coated paint layer, said magnetic paint comprising magnetic recording layer-forming components including a ferromagnetic powder, an abrasive and a resin component dispersed in an organic solvent, and then subjecting the coated layer to magnetic orientation, in which a step of drawing the ferromagnetic powder in the coated magnetic paint toward the surface of the support by means of a magnet is arranged in advance of the orientation step.
摘要翻译：一种用于制备磁记录介质的方法的改进，包括以下步骤：将磁性涂料施加到非磁性载体的表面上以形成涂覆的涂料层，所述磁性涂料包括磁记录层形成组分，其包括铁磁性粉末，分散在有机溶剂中的研磨剂和树脂组分，然后将涂层进行磁性取向，其中通过磁体将涂覆的磁性涂料中的铁磁性粉末拉伸到载体表面的步骤被布置在前进方向步骤。

55. 发明授权

US4743500A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4743500A
公开(公告)日：1988-05-10
申请号：US918261
申请日：1986-10-14
申请人： Takahito Miyoshi , Masaaki Fujiyama
发明人： Takahito Miyoshi , Masaaki Fujiyama
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/708
CPC分类号： G11B5/7085 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic metal powder having a specific surface area of not less than 45 m.sup.2 /g and an inorganic powder having a Mohs' scale of hardness of not less than 5 which are dispersed in a binder,wherein5-40 particles of said inorganic powder are arranged in the magnetic recording layer per (10 .mu.m).sup.2 of the surface area of said recording layer in such manner that a portion of each inorganic particle is exposed on of the surface of the magnetic recording layer; andthe average content of said inorganic powder in a portion of said recording layer within depth of 0.1 .mu.m from the surface thereof is higher than that in other portion of the magnetic recording layer.
摘要翻译：一种磁记录介质，包括设置在所述载体上的非磁性载体和磁记录层，所述磁记录层包含比表面积不小于45m 2 / g的铁磁性金属粉末和莫氏体积分散在粘合剂中的不小于5的硬度，其中所述无机粉末的5-40个颗粒以所述记录层的表面积的每个（10μm）2布置在磁记录层中，的每个无机颗粒暴露在磁记录层的表面上; 并且所述记录层的与其表面的深度为0.1μm的部分中的所述无机粉末的平均含量高于磁记录层的其它部分的平均含量。

56. 发明授权

US4701364A Tape for cleaning magnetic head 失效
标题翻译：胶带用于清洁磁头
公开(公告)号：US4701364A
公开(公告)日：1987-10-20
申请号：US863155
申请日：1986-05-14
申请人： Takahito Miyoshi , Akira Kasuga , Masaaki Fujiyama
发明人： Takahito Miyoshi , Akira Kasuga , Masaaki Fujiyama
IPC分类号： G11B5/41 , G11B5/627 , G11B5/70
CPC分类号： G11B5/41 , G11B5/627 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/265 , Y10T428/31786
摘要： A tape for cleaning magnetic head comprising a support and a cleaning layer coated on at least one surface of said support, which is characterized in that said cleaning layer contains a ferromagnetic metal powder as abrasive, the surface of said cleaning layer is a surface of center line average height of not less than 0.025 .mu.m as cut-off value of 0.08 mm, and said tape has a stiffness of not more than 2.
摘要翻译：一种用于清洁磁头的磁带，其特征在于，所述清洁层包含作为磨料的铁磁金属粉末，所述清洁层的表面是中心的表面，所述磁带包括支撑体和涂覆在所述支撑体的至少一个表面上的清洁层线平均高度不小于0.025μm，截止值为0.08mm，所述带的刚度不大于2。

57. 发明授权

US4687703A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4687703A
公开(公告)日：1987-08-18
申请号：US874185
申请日：1986-06-13
申请人： Takahito Miyoshi , Masaaki Fujiyama
发明人： Takahito Miyoshi , Masaaki Fujiyama
IPC分类号： C09D5/23 , G11B5/706 , G11B5/708 , G11B5/714
CPC分类号： G11B5/714 , G11B5/7085 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium is described, comprising a non-magnetic support having coated thereon a magnetic layer, the magnetic layer containing (i) ferromagnetic alloy particles having a specific surface area (S.sub.BET) of 48 m.sup.2 /g or more and (ii) inorganic particles having an average particle size of 0.2 .mu.m or less and having a Mohs' hardness of 6 or more in an amount of 10 to 30 wt % based on the total weight of ferromagnetic alloy particles.
摘要翻译：描述了一种磁记录介质，其包括其上涂覆有磁性层的非磁性载体，所述磁性层包含（i）具有48m 2 / g以上的比表面积（SBET）的铁磁合金颗粒和（ii）无机相对于铁磁性合金粒子的总重量，平均粒径为0.2μm以下，莫氏硬度为6以上的粒子为10〜30重量％。

58. 发明授权

US4678706A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4678706A
公开(公告)日：1987-07-07
申请号：US791174
申请日：1985-10-24
申请人： Fumihiro Tokunaga , Takamitsu Asai , Masaaki Fujiyama
发明人： Fumihiro Tokunaga , Takamitsu Asai , Masaaki Fujiyama
IPC分类号： C10M103/02 , C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10M103/06 , C10N10/04 , C10N10/08 , C10N40/18 , G11B5/73 , G11B5/735 , G11B5/72
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording medium is described, comprising a non-magnetic support, a magnetic recording layer on one side of the support, and a backing layer on the opposite side of the support to the magnetic recording layer, wherein said backing layer comprising a binder and a powder dispersed in the binder, wherein the powder is a powdered oxide represented by the formula M.sup.1.M.sup.2.O.sub.2+x (wherein M.sup.1 is at least one element selected from the group consisting of Ba, Sr, Pb and Ca, M.sup.2 is at least one element selected from the group consisting of Ti, Zr and Sn, and x is in the range of from 0 to 0.9) or a mixture of said powdered oxide and carbon black. This magnetic recording medium has a decreased coefficient of friction, is free from formation of scratches, has good durability, and furthermore, maintains good S/N characteristics.
摘要翻译：描述了一种磁记录介质，其包括非磁性支撑体，在支撑体的一侧上的磁记录层，以及位于与磁记录层的支撑体相反侧的背衬层，其中所述背衬层包括粘合剂和分散在所述粘合剂中的粉末，其中所述粉末是由式M1.M2.O 2 + x（其中M1是选自Ba，Sr，Pb和Ca，M2中的至少一种元素）所代表的粉末状氧化物至少一种选自Ti，Zr和Sn的元素，x在0至0.9的范围内）或所述粉末状氧化物和炭黑的混合物。该磁记录介质具有降低的摩擦系数，没有形成划痕，具有良好的耐久性，并且还保持良好的S / N特性。

59. 发明授权

US4629653A Magnetic recording medium having laminated hexagonal ferrite platelets 失效
标题翻译：具有层叠六方晶系铁素体血小板的磁记录介质
公开(公告)号：US4629653A
公开(公告)日：1986-12-16
申请号：US677407
申请日：1984-12-03
申请人： Takamitsu Asai , Masaaki Fujiyama , Minoru Kanazawa , Nobuo Aoki
发明人： Takamitsu Asai , Masaaki Fujiyama , Minoru Kanazawa , Nobuo Aoki
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/08 , G11B5/706 , G11B5/708 , G11B5/714
CPC分类号： G11B5/714 , G11B5/70678 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein said ferromagnetic particles have a tabular ratio (table diameter/table thickness) of 2 or more, a table diameter of from 0.01 to 10 .mu.m, and a lamination degree of the magnetic particles in the magnetic layer in a cross-section thereof of 2 or more.
摘要翻译：描述了一种磁记录介质，其包括在其上设置有含有铁磁颗粒和粘合剂的磁性层的非磁性载体，其中所述铁磁颗粒具有2或更大的平板比（表直径/台厚度），表直径 0.01〜10μm，磁性层的磁性粒子的横截面为2以上的层叠度。

60. 发明授权

US4504542A Magnetic recording medium having a subbing layer of amorphous saturated polyesters 失效
标题翻译：具有无定形饱和聚酯底层的磁记录介质
公开(公告)号：US4504542A
公开(公告)日：1985-03-12
申请号：US515737
申请日：1983-07-21
申请人： Takahito Miyoshi , Toshimitu Okutu , Masaaki Fujiyama
发明人： Takahito Miyoshi , Toshimitu Okutu , Masaaki Fujiyama
IPC分类号： C09D167/00 , G11B5/73 , G11B5/738 , B32B7/02 , B32B27/06
CPC分类号： G11B5/738 , Y10T428/265 , Y10T428/31565 , Y10T428/31786 , Y10T428/31797
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support base having position thereon a subbing layer and a magnetic layer. The subbing layer is comprised of an amorphous saturated polyester having a glass transition temperature of 10.degree. C. to 60.degree. C. The recording medium provided has excellent adhesiveness between the magnetic layer and the support due to the presence of the subbing layer. Furthermore, the resulting magnetic recording medium provides excellent electromagnetic characteristics such as a desirable video S/N ratio.
摘要翻译：公开了一种磁记录介质。所述介质包括其上具有底层和磁性层的位置的支撑基底。底层由玻璃化转变温度为10℃至60℃的无定形饱和聚酯组成。由于存在着底层，所提供的记录介质具有优异的磁性层与载体之间的粘附性。此外，所得到的磁记录介质提供了优异的电磁特性，例如期望的视频S / N比。

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