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61. 发明授权

US4780353A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4780353A
公开(公告)日：1988-10-25
申请号：US83896
申请日：1987-08-06
申请人： Masatoshi Takahashi , Chiaki Mizuno , Hiroshi Ogawa , Yasuo Tamai , Noburo Hibino
发明人： Masatoshi Takahashi , Chiaki Mizuno , Hiroshi Ogawa , Yasuo Tamai , Noburo Hibino
IPC分类号： G11B5/66 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/706 , G11B5/73
CPC分类号： G11B5/7305 , G11B5/70615 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/31786
摘要： A magnetic recording medium comprising a flexible support having coated thereon a magnetic layer is disclosed. The support has a surface roughness of from 0.01 to 0.1 .mu.m, the magnetic recording medium has a percent heat shrinkage of 1% or less in the direction of maximum shrinkage thereof after standing at 110.degree. C. for 4 hours, and the magnetic layer contains a metal or alloy fine powder as a ferromagnetic powder. The magnetic recording medium has a excellent running property after repeated use and a small percent heat shrinkage.
摘要翻译：公开了一种包括其上涂覆有磁性层的柔性支撑体的磁记录介质。该载体的表面粗糙度为0.01〜0.1μm，磁记录介质在110℃放置4小时后，其最大收缩方向的热收缩率为1％以下，磁性层含有作为铁磁粉末的金属或合金细粉末。磁记录介质在重复使用后具有优异的运行性能和小的热收缩率。

62. 发明授权

US4728563A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4728563A
公开(公告)日：1988-03-01
申请号：US898421
申请日：1986-08-20
申请人： Shinji Saito , Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
发明人： Shinji Saito , Hiroshi Ogawa , Chiaki Mizuno , Yasuo Tamai
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/704
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24942 , Y10T428/2978
摘要： A magnetic recording medium in the form of tape such as an audio-tape or a video-tape comprising a flexible support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, which is characterized in that said magnetic recording medium has dynamic modulus of not lower than 4.5.times.10.sup.10 dyne/cm.sup.2 in the longitudinal direction at 110.degree. C.
摘要翻译：磁带式磁记录介质，例如音频带或录像带，其中包括柔性支撑件和设置在所述支架上的磁记录层，所述磁记录层包括分散在粘合剂中的铁磁性粉末，其特征在于因为所述磁记录介质在110℃下的纵向的动态模量不低于4.5×10 10达因/ cm 2。

63. 发明授权

US4722862A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4722862A
公开(公告)日：1988-02-02
申请号：US850614
申请日：1986-04-11
申请人： Hiroshi Ogawa , Nobuo Yamazaki , Yasuo Tamai
发明人： Hiroshi Ogawa , Nobuo Yamazaki , Yasuo Tamai
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/06 , C09D183/04 , G11B5/70 , G11B5/706 , G11B5/73
CPC分类号： G11B5/70642 , G11B5/70 , Y10S428/90 , Y10T428/25 , 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 powder dispersed in a binder, in whichH.sub.1 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of a magnetic hysteresis curve determined in the direction of orientation of the ferromagnetic powder in the magnetic recording layer in the fourth quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the third quadrant;H.sub.2 in terms of oersted which is a value of external magnetic field determined when a magnetic flux density of said magnetic hysteresis curve in the first quadrant is equivalent to one-third of the maximum magnetic flux density of said magnetic hysteresis curve in the first quadrant;Hc in terms of oersted which is a coercive force of the magnetic recording layer; andBr in terms of gauss which is a residual magnetic flux density of the magnetic recording layer,have the relationship defined by the following inequality:10.times.(H.sub.2 -H.sub.1)/Hc.ltoreq.0.0004.times.Br+1.
摘要翻译：一种包含非磁性载体和设置在所述载体上的磁记录层的磁记录介质，所述磁记录层包括分散在粘结剂中的铁磁性粉末，其中以奥斯特为基础的H1，其为当磁性在第四象限中的磁记录层中的铁磁性粉末的取向方向确定的磁滞曲线的磁通密度相当于第三象限中所述磁滞曲线的最大磁通密度的三分之一; H2，其是当第一象限中的所述磁滞曲线的磁通密度等于第一象限中的所述磁滞曲线的最大磁通密度的三分之一时确定的外部磁场的值; Hc是磁记录层的矫顽力的奥斯特; 以及作为磁记录层的残留磁通密度的高斯计，具有以下不等式定义的关系：10x（H2-H1）/ Hc <0.0004×Br + 1。

64. 发明授权

US4664981A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4664981A
公开(公告)日：1987-05-12
申请号：US692807
申请日：1985-01-18
申请人： Hiroshi Ogawa , Yasuo Tamai
发明人： Hiroshi Ogawa , Yasuo Tamai
IPC分类号： G11B5/70 , C08L27/06 , C08L75/00 , C08L75/04 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C09D175/06 , G11B5/702 , G11B5/73
CPC分类号： G11B5/7023 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31931 , Y10T428/31935 , Y10T428/31938
摘要： A magnetic recording medium having excellent electromagnetic properties and satisfactory running durability prepared by mixing a highly concentrated solution of copolymers for vinyl chloride, vinyl acetate and maleic anhydride with ferromagnetic particles and kneading them, and then adding a solution of rubber type resins and additives thereto and dispersing them, and if desired, by adding and mixing polyisocyanate compounds therewith.
摘要翻译：通过将氯乙烯，乙酸乙烯酯和马来酸酐的共聚物的高浓度溶液与铁磁性颗粒混合并捏合而制备的具有优异的电磁特性和令人满意的运行耐久性的磁记录介质，然后向其中加入橡胶类树脂和添加剂溶液，分散它们，如果需要，通过加入和混合多异氰酸酯化合物。

65. 发明授权

US4617234A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4617234A
公开(公告)日：1986-10-14
申请号：US673318
申请日：1984-11-20
申请人： Masashi Aonuma , Yasuo Tamai
发明人： Masashi Aonuma , Yasuo Tamai
IPC分类号： C09D5/23 , C09D7/12 , G11B5/706 , G11B5/714 , G03C7/24 , G11B5/70 , H01F10/02
CPC分类号： G11B5/714 , G11B5/70605 , Y10S428/90 , Y10T428/256
摘要： An improved magnetic recording medium comprising a magnetic layer formed by applying a ferromagnetic metal powder together with a binder to a non-magnetic base is described. The improvement is that the ferromagnetic metal powder has a saturation magnetism of 120 to 140 emu/g and a specific surface area measured by the BET method of 23 to 35 m/g, and the magnetic layer has a coercive force of 670 to 770 oersteds and a residual magnetic flux density of about 2,000 to 3,200 gauss. The magnetic recording medium is suitable for cassette tapes used in a high position and has excellent reproductive output in the whole band while keeping noise low.
摘要翻译：描述了一种改进的磁记录介质，其包括通过将铁磁金属粉末与粘合剂一起施加到非磁性基底而形成的磁性层。改进之处在于铁磁性金属粉末的饱和磁性为120〜140emu / g，通过BET法测定的比表面积为23〜35m / g，磁性层的矫顽力为670〜770奥斯特剩余磁通密度约为2,000〜3,200高斯。磁记录介质适用于在高位置使用的盒式磁带，并且在整个频带中具有优异的生殖输出，同时保持低噪声。

66. 发明授权

US4500599A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4500599A
公开(公告)日：1985-02-19
申请号：US613748
申请日：1984-05-23
申请人： Hiroshi Ogawa , Chiaki Mizuno , Kouichi Masaki , Masaaki Suzuki , Yasuo Tamai
发明人： Hiroshi Ogawa , Chiaki Mizuno , Kouichi Masaki , Masaaki Suzuki , Yasuo Tamai
IPC分类号： C09D5/23 , C09D7/12 , G11B5/706 , G11B5/714 , G11B5/70 , B32B5/16
CPC分类号： G11B5/70652 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium comprising a nonmagnetic base having formed thereon a magnetic layer containing a fine particulate ferromagnetic material dispersed in a binder is disclosed. The ferromagnetic material is a mixture of two fine ferromagnetic powders (a) and (b) in a weight ratio of from 90/10 to 30/70. The powder (a) comprises .gamma.-Fe.sub.2 O.sub.3 particles having a coercivity (Hc) of 330 to 390 Oe and a saturation magnetization (.sigma.s) of 68 to 80 emu/g at a maximum magnetizing force (Hm) of 5 KOe, and a specific surface area of 18 to 25 m.sup.2 /g, and powder (b) comprises .gamma.-Fe.sub.2 O.sub.3 particles having a coercivity (Hc) of 400 to 450 Oe and a saturation magnetization (.sigma.s) of 65 to 78 emu/g at a maximum magnetizing force (Hm) of 5 KOe, and a specific surface area of 22 to 30 m.sup.2 /g. The tape has the ability to clearly and faithfully reproduce high fidelity sound.
摘要翻译：公开了一种磁记录介质，其包括在其上形成有包含分散在粘合剂中的细颗粒铁磁材料的磁性层的非磁性基底。铁磁材料是两种细铁磁粉末（a）和（b）的重量比为90/10至30/70的混合物。粉末（a）包括在5KOe的最大磁化力（Hm）下矫顽力（Hc）为330至390Oe，饱和磁化强度（sigma s）为68至80emu / g的γ-Fe 2 O 3颗粒，以及比表面积为18〜25m2 / g，粉末（b）包含矫顽力（Hc）为400〜450Oe，饱和磁化强度（sigma）为65〜78emu / g的γ-Fe 2 O 3粒子磁化力（Hm）为5KOe，比表面积为22〜30m2 / g。磁带具有清晰忠实地再现高保真度的声音的能力。

67. 发明授权

US4446205A Magnetic recording tape having a leader tape 失效
标题翻译：具有引导带的磁记录带
公开(公告)号：US4446205A
公开(公告)日：1984-05-01
申请号：US447582
申请日：1982-12-07
申请人： Chiaki Mizuno , Yasuo Tamai , Nobuo Tsuji
发明人： Chiaki Mizuno , Yasuo Tamai , Nobuo Tsuji
IPC分类号： G11B5/41 , G11B5/627 , G11B5/78 , G11B23/26 , G11B5/70 , B32B5/16
CPC分类号： G11B5/627 , G11B23/26 , Y10S428/90 , Y10T428/25 , Y10T428/254
摘要： A leader tape for use in connection with a magnetic recording tape is disclosed. The leader tape is connected to one or both ends of a magnetic recording tape in order to clean components of the recorder such as the head of the recorder in which the tape is used. The leader tape is comprised of a support base having a cleaning layer coated thereon. The cleaning layer is comprised of a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 .mu.m and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 .mu.m. The leader tape has a light percent transmittence of 20% or more.
摘要翻译：公开了一种用于磁记录带的连接带。引导带连接到磁记录带的一端或两端，以清洁记录器的组件，例如使用磁带的记录器的磁头。引导带由其上涂覆有清洁层的支撑基底组成。清洗层由分散有粒径为0.1〜20μm的有机热分子粉末和粒径为0.1〜10μm的有机热固性高分子粉末的粘合剂构成。领带具有20％以上的透光率。

68. 发明授权

US4410565A Method of making a magnetic recording medium 失效
标题翻译：制造磁记录介质的方法
公开(公告)号：US4410565A
公开(公告)日：1983-10-18
申请号：US352224
申请日：1982-02-25
申请人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
发明人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
IPC分类号： G11B5/66 , C09D167/00 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/84 , G11B5/851 , H01F41/20 , H01F10/02
CPC分类号： H01F41/20 , G11B5/64 , G11B5/84 , G11B5/851
摘要： 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 applying a prime coat onto a substrate, forming a magnetic metal layer having columnar grains by vapor deposition, and then heating and pressing the obtained combination.
摘要翻译：一种磁记录介质，包括基底，其上提供的热塑性底涂层，以及具有至少部分地从其顶部渗透到底涂层中并与其一体化的柱状颗粒的强磁性金属层。通过将基底涂布在基板上，通过气相沉积形成具有柱状晶粒的磁性金属层，然后加热并压制所得到的组合来制备介质。

69. 发明授权

US4354908A Process for the production of magnetic recording members 失效
标题翻译：制造磁记录部件的方法
公开(公告)号：US4354908A
公开(公告)日：1982-10-19
申请号：US923752
申请日：1978-07-11
申请人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
发明人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
IPC分类号： C23C14/32 , G11B5/85 , H01F41/14 , H01F41/20 , C23C15/00
CPC分类号： H01F41/14
摘要： 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 between the support and a vaporization source is at least about 5 kv/m.
摘要翻译：一种用于制造磁记录部件的方法，包括在使铁磁金属的蒸气束撞击载体的入射角至少为约50°的条件下进行电场气相沉积，并且支撑体并且蒸发源为至少约5kv / m。

70. 发明授权

US4265931A Process for the production of a magnetic recording member 失效
标题翻译：用于制造磁记录部件的方法
公开(公告)号：US4265931A
公开(公告)日：1981-05-05
申请号：US74029
申请日：1979-09-10
申请人： Yasuo Tamai , Hiroshi Ogawa
发明人： Yasuo Tamai , Hiroshi Ogawa
IPC分类号： C09D5/23 , G11B5/716 , G11B5/842 , B05D3/14
CPC分类号： G11B5/716 , G11B5/842
摘要： A process for producing a magnetic recording member comprising a non-magnetic support and a magnetic layer comprising at least two layers on the non-magnetic support which comprises the steps of:(A) providing the lower magnetic layer on the non-magnetic support;(B) bringing the lower magnetic layer into contact with an organic solvent incapable of dissolving the lower magnetic layer; and(C) providing the upper magnetic layer on the lower magnetic layer by coating thereon a magnetic coating composition, preferably containing the above organic solvent or a binder soluble in the above organic solvent.
摘要翻译：一种制造包括非磁性载体和在非磁性载体上至少包含两层的磁性层的磁性记录部件的方法，该方法包括以下步骤：（A）在非磁性载体上提供下部磁性层; （B）使下磁性层与不能溶解下磁性层的有机溶剂接触; 和（C）通过在其上涂覆优选含有上述有机溶剂或可溶于上述有机溶剂的粘合剂的磁性涂料组合物在上述下磁性层上提供上层磁性层。

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