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1. 发明授权

US4002804A Magnetic recording material 失效
标题翻译：磁记录材料
公开(公告)号：US4002804A
公开(公告)日：1977-01-11
申请号：US600689
申请日：1975-07-31
申请人： Goro Akashi , Masaaki Fujiyama , Nobutaka Yamaguchi , Satoru Takayama , Koji Sasazawa
发明人： Goro Akashi , Masaaki Fujiyama , Nobutaka Yamaguchi , Satoru Takayama , Koji Sasazawa
IPC分类号： C09D5/23 , C09D7/12 , G11B5/706 , G11B5/714 , B23B15/00
CPC分类号： G11B5/714 , G11B5/706 , G11B5/70694 , Y10S428/90 , Y10T428/24975
摘要： A magnetic recording material which comprises a support having thereon a magnetic recording layer comprising a ferromagnetic substance and a binder, wherein the ferromagnetic substance comprises a mixture of (1) a Berthollide iron oxide having a particle size of about 0.5 .mu. or larger and a degree of oxidation represented by the value of x in FeO.sub.x of 1.33
摘要翻译：一种磁记录材料，包括其上具有包含铁磁性物质和粘合剂的磁记录层的载体，其中所述铁磁性物质包含（1）粒径为约0.5μm或更大的Berthollide氧化铁和的FeOx中的x值为1.33

2. 发明授权

US4273797A Method of detecting pinholes in a magnetic recording medium 失效
标题翻译：检测磁记录介质中针孔的方法
公开(公告)号：US4273797A
公开(公告)日：1981-06-16
申请号：US30538
申请日：1979-04-16
申请人： Goro Akashi , Yasuyuki Yamada , Masaaki Fujiyama , Nobutaka Yamaguchi
发明人： Goro Akashi , Yasuyuki Yamada , Masaaki Fujiyama , Nobutaka Yamaguchi
IPC分类号： C09D177/00 , C09D127/06 , C09D163/00 , G11B5/708 , G11B5/73 , G11B5/735 , B05D5/12
CPC分类号： G11B5/708 , G11B5/735
摘要： A magnetic recording medium comprising a plastic film support having a magnetic recording layer on one side is provided with a backing layer containing: (1) a white and/or light colored powder; (2) carbon black and/or graphite; and (3) a polymeric binder. The backing layer transmits more than 3% of white light at a thickness of 2 microns and has a surface electrical resistance of less than 10.sup.10 .OMEGA./cm. Pinholes and drop-out are easily detected in forming such a magnetic recording medium.
摘要翻译：包括在一侧具有磁记录层的塑料膜载体的磁记录介质设置有背衬层，其包含：（1）白色和/或浅色粉末; （2）炭黑和/或石墨; 和（3）聚合物粘合剂。背衬层以2微米的厚度透过超过3％的白光，其表面电阻小于1010欧米加/厘米。在形成这种磁记录介质时容易检测出针孔和脱落。

3. 发明授权

US4200680A Process for preparing magnetic iron oxide and magnetic iron oxide produced thereby 失效
标题翻译：由此制备磁性氧化铁和磁性氧化铁的方法
公开(公告)号：US4200680A
公开(公告)日：1980-04-29
申请号：US586443
申请日：1975-06-12
申请人： Koji Sasazawa , Shigeo Komine , Tatsuji Kitamoto , Goro Akashi
发明人： Koji Sasazawa , Shigeo Komine , Tatsuji Kitamoto , Goro Akashi
IPC分类号： C01G49/02 , C01G49/00 , G11B5/706 , H01F1/11 , H01F10/02
CPC分类号： G11B5/70673 , Y10S428/90 , Y10T428/2991
摘要： A magnetic iron oxide having a large coercive force and an improved squareness ratio prepared by coating the surface of needle-like particles of magnetic iron oxide with a cobalt compound, placing the coated iron oxide particles in a unidirectionally oriented magnetic field thereby orienting the particles in the direction of the magnetic field, and heat-treating the needle-like particles in this state with the application of an external magnetic field, or heat-treating the needle-like particles in a magnetized state.
摘要翻译：通过用钴化合物涂覆磁性氧化铁的针状颗粒的表面而制备的具有大的矫顽力和改善的矩形比的磁性氧化铁，将涂覆的氧化铁颗粒置于单向取向的磁场中，从而使颗粒定向磁场的方向，在这种状态下通过施加外部磁场对针状颗粒进行热处理，或者将针状颗粒热处理为磁化状态。

4. 发明授权

US4267207A Process for producing cobalt-containing ferromagnetic iron oxide powder 失效
标题翻译：含钴铁磁性氧化铁粉末的生产工艺
公开(公告)号：US4267207A
公开(公告)日：1981-05-12
申请号：US39028
申请日：1979-05-14
申请人： Koji Sasazawa , Tatsuji Kitamoto , Goro Akashi , Kouichi Masaki , Shinichiro Dezawa
发明人： Koji Sasazawa , Tatsuji Kitamoto , Goro Akashi , Kouichi Masaki , Shinichiro Dezawa
IPC分类号： C01G49/00 , C01G49/02 , G11B5/706 , H01F1/11 , B05D5/12
CPC分类号： G11B5/70694 , C01G49/02 , G11B5/70642 , C01P2006/42
摘要： 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 temperature of about 50.degree. C. or less;(b) heating the dispersion to a temperature of at least about 60.degree. C. but below the boiling point of the dispersion under non-oxidizing conditions to cause a reaction; and(c) treating the dispersion at a temperature of at least about 60.degree. C. but below the boiling point of the dispersion under the following conditions:(1) initially treating the dispersion under non-oxidizing conditions for about 5 minutes or more;(2) subsequentially treating the dispersion under oxidizing conditions for about 5 minutes or more prior to the termination of the reaction; and(3) a total treating time under non-oxidizing conditions and oxidizing conditions of at least about 30 minutes.
摘要翻译：一种适用于磁记录的含钴铁磁性氧化铁粉末的制造方法，其特征在于，包括：（a）在非氧化条件下，将钴离子，亚铁离子和碱与针状铁磁性氧化铁核的水分散体混合， 50℃以下; （b）在非氧化条件下将分散体加热到至少约60℃但低于分散体的沸点以引起反应; 和（c）在以下条件下，在至少约60℃但低于分散体沸点的温度下处理分散体：（1）最初在非氧化条件下处理分散体约5分钟或更长时间; （2）在反应终止之前，在氧化条件下将分散体顺序处理约5分钟或更长时间; 和（3）在非氧化条件和氧化条件下的总处理时间为至少约30分钟。

5. 发明授权

US4015030A Process for stabilization of ferromagnetic material and magnetic recording member 失效
标题翻译：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
IPC分类号： H01F1/11 , C09D5/23 , C09D7/12 , G11B5/62 , G11B5/706 , H01F10/02
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.

6. 发明授权

US4450199A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4450199A
公开(公告)日：1984-05-22
申请号：US251826
申请日：1981-04-07
申请人： Eiichi Tadokoro , Masaaki Fujiyama , Goro Akashi
发明人： Eiichi Tadokoro , Masaaki Fujiyama , Goro Akashi
IPC分类号： G11B5/70 , B32B3/10
CPC分类号： G11B5/70 , Y10S428/90 , Y10T428/249986 , Y10T428/31551 , Y10T428/31565 , Y10T428/31884 , Y10T428/31935
摘要： A magnetic recording medium is disclosed which comprises a nonmagnetic support and a magnetic layer formed thereon, said magnetic layer having a center-line average surface roughness of not more than 2.1.times.10.sup.-2 .mu. and at least one property selected from an average pore size of at least 500 .ANG. and a porosity of at least 30%.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体和形成在其上的磁性层，所述磁性层的中心线平均表面粗糙度不大于2.1×10-2μm，并且至少一种性质选自平均孔径至少500 ANGSTROM，孔隙率至少为30％。

7. 发明授权

US4391851A Process for producing 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：US4391851A
公开(公告)日：1983-07-05
申请号：US353791
申请日：1982-03-02
申请人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
发明人： Yasuyuki Yamada , Goro Akashi , Nobuo Tsuji , Yoshito Mukaida , Masaaki Fujiyama
IPC分类号： G11B5/842 , G11B5/702 , G11B5/84 , H01F10/02
CPC分类号： G11B5/84 , G11B5/7021
摘要： A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.
摘要翻译：公开了一种制造磁记录介质的方法。该方法包括用含有细铁磁颗粒的磁性涂层溶液和包含硝化纤维素，多元醇和具有至少两个异氰酸酯基的异氰酸酯的粘合剂涂覆非磁性碱。在该方法中，将磁性层中的残留溶剂的0.3〜3重量％的纤维网压延，然后将压延纤维网彻底干燥。

8. 发明授权

US4135032A Magnetic recording medium 失效
公开(公告)号：US4135032A
公开(公告)日：1979-01-16
申请号：US835376
申请日：1977-09-21
申请人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
发明人： Goro Akashi , Masaaki Fujiyama , Yasuyuki Yamada
IPC分类号： G11B5/70 , G11B5/735 , G11B5/78
CPC分类号： G11B5/70 , G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/258 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetizable plastic film support having a magnetic recording layer on one side thereof and, on the other side thereof, a layer containing (1) at least one powder of carbon black or graphite, and (2) at least one powder of a white pigment or a light colored pigment, and (3) a binder, powders (1) and (2) forming divided color areas in the back surface layer, and the back surface layer having a surface electrical resistance below 1 .times. 10.sup.10 ohm/cm.sup.2.

9. 发明授权

US4117190A Magnetic recording medium 失效
公开(公告)号：US4117190A
公开(公告)日：1978-09-26
申请号：US516315
申请日：1974-10-21
申请人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
发明人： Goro Akashi , Osamu Suzuki , Masaaki Fujiyama
IPC分类号： G11B5/708 , G11B5/72 , H01F10/06
CPC分类号： G11B5/72 , G11B5/708 , Y10S428/90 , Y10T428/25 , Y10T428/252 , Y10T428/256 , Y10T428/257 , Y10T428/259
摘要： By incorporating 5 to 15 parts by weight of a finely divided powder having high hardness and a particle size of less than 10.mu. with 100 parts by weight of graphite powder with 20 to 50 parts by weight of a binder in a graphite layer of a magnetic recording medium which comprises a support, a magnetizable layer and a graphite layer provided on the opposite side of the support from the magnetizable layer, a reduction in the abrasion and the destruction of the graphite layer during running can be reduced.

10. 发明授权

US4397911A Cleaning tape 失效
标题翻译：清洁胶带
公开(公告)号：US4397911A
公开(公告)日：1983-08-09
申请号：US276746
申请日：1981-06-24
申请人： Goro Akashi , Masaaki Fujiyama
发明人： Goro Akashi , Masaaki Fujiyama
IPC分类号： G11B5/41 , G11B23/50 , B32B5/16 , G11B5/78
CPC分类号： G11B23/50 , G11B5/41 , Y10S428/90 , Y10T428/25 , Y10T428/254 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/266 , Y10T428/31786 , Y10T428/31797
摘要： Cleaning tape having a cleaning layer formed on one or both sides of a base is disclosed. Said cleaning layer is composed of (1) a binder, (2) an organic polymer powder whose particle size is 3.mu. or more, and (3) an inorganic solid powder whose particle size is 3.mu. or less.
摘要翻译：公开了具有形成在基座的一侧或两侧上的清洁层的清洁带。所述清洗层由（1）粘合剂，（2）粒径为3μm以上的有机聚合物粉末和（3）粒径为3μm以下的无机固体粉末构成。

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