-
21.发明授权
公开(公告)号：US4241368A
公开(公告)日：1980-12-23
申请号：US24209
申请日：1979-03-27
申请人： Eiichi Tadokoro , Tatsuji Kitamoto
发明人： Eiichi Tadokoro , Tatsuji Kitamoto
CPC分类号： G11B23/505 , G11B23/50 , Y10S15/12
摘要： 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 magnetic sheet in advance of the head when the magnetic sheet is rotated. The scraping member removes from the surface of the magnetic layer scratches and dust particles which cause drop-out of the output level.
摘要翻译： 在磁片记录器中，刮削构件与磁头相关联地安装，以与磁头一起与磁性片的磁性层接触。 刮削构件安装在头部前方，以便当磁片旋转时，在头部之前处理磁片的记录轨迹。 刮擦构件从磁性层的表面除去导致输出水平下降的划痕和灰尘颗粒。
-
公开(公告)号：US4183976A
公开(公告)日：1980-01-15
申请号：US870146
申请日：1978-01-17
申请人： Yasuyuki Yamada , Tatsuji Kitamoto
发明人： Yasuyuki Yamada , Tatsuji Kitamoto
CPC分类号： G11B5/738
摘要： A process of producing a magnetic recording element comprising a non-magnetic support having provided thereon a subbing layer and further having provided thereon a magnetic layer comprising a ferromagnetic powder and a binder, in which the non-magnetic support is a biaxially stretched polyester and the subbing layer is formed by coating a coating solution having a solids concentration of about 0.8 to about 5 wt% comprising an amorphous linear saturated polyester resin containing an aromatic dicarboxylic acid, 10 to 50 wt% of a vinylidene chloride addition polymerizable nitrile copolymer based on the polyester resin and an organic solvent mainly composed of methyl ethyl ketone, which comprises coating the subbing solution at a temperature of about 100.degree. C. or below to provide a dry thickness of about 0.03 to about 2.0 .mu.m, drying the coated layer and then coating the magnetic recording layer thereon.
摘要翻译： 一种制造磁记录元件的方法，该磁记录元件包括非磁性载体，其上设置有一个底层，并且还设置有包含铁磁性粉末和粘合剂的磁性层，其中非磁性载体是双轴拉伸的聚酯， 通过涂布固体浓度为约0.8至约5重量％的涂布溶液，其包含含有芳族二羧酸的无定形线性饱和聚酯树脂，10至50重量％的偏二氯乙烯加成聚合性腈共聚物，基于 聚酯树脂和主要由甲基乙基酮组成的有机溶剂，其包括在约100℃或更低的温度下涂覆底层溶液以提供约0.03至约2.0μm的干燥厚度，干燥涂层，然后 在其上涂覆磁记录层。
-
公开(公告)号：US4128691A
公开(公告)日：1978-12-05
申请号：US709103
申请日：1976-07-27
CPC分类号： G11B5/656 , H01F41/14 , Y10S428/90 , Y10T428/265
摘要： The process for the production of a magnetic recording medium by electroless plating comprises carrying out the plating in a plating aqueous solution containing at least one ferromagnetic metal ion, barium ion and hypophosphite ion as a reducing agent, and thus forming a magnetic metal thin film.
摘要翻译： 通过无电解电镀制造磁记录介质的方法包括在含有至少一种铁磁性金属离子，钡离子和次磷酸根离子的电镀水溶液中进行电镀作为还原剂，从而形成磁性金属薄膜。
-
公开(公告)号：US4101948A
公开(公告)日：1978-07-18
申请号：US753165
申请日：1976-12-21
申请人： Eiichi Tadokoro , Tatsuji Kitamoto
发明人： Eiichi Tadokoro , Tatsuji Kitamoto
CPC分类号： G11B23/505
摘要： A soft, coarse, porous cleaning sheet 32 is adhered to the upper surface of a flat horizontal base plate 2, and has approximately the same configuration as the base plate. A floppy record disc 9 having a magnetic layer 10 is secured to the spindle 6 of a motor 5, and when the disc is rotated at a "below levitation" speed the layer 10 slidingly engages the cleaning sheet 32 and is scrape dusted clean thereby.
-
公开(公告)号：US4713261A
公开(公告)日：1987-12-15
申请号：US928352
申请日：1986-11-10
申请人： Kouichi Masaki , Tatsuji Kitamoto
发明人： Kouichi Masaki , Tatsuji Kitamoto
CPC分类号： G11B5/70657
摘要： 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.
摘要翻译： 描述了一种制备铁磁性氧化铁颗粒的方法，其包括将钴化合物沉积在沥青粉（γ-FeOOH）颗粒的表面上，然后在150℃至350℃下煅烧颗粒。
-
26.发明授权
公开(公告)号：US4554089A
公开(公告)日：1985-11-19
申请号：US545289
申请日：1983-10-25
申请人： Shizuo Umemura , Tatsuji Kitamoto
发明人： Shizuo Umemura , Tatsuji Kitamoto
CPC分类号： H01F1/061 , H01F1/09 , Y10S428/90 , Y10T428/2991
摘要： 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 stabilizing the magnetic characteristics of the particles at temperatures not higher than 80.degree. C. in air. The particles are produced by gradually oxidizing ferromagnetic metal particles containing no cobalt in oxygen-containing gas such that the surface-oxidized metal particles have a saturation magnetization of 60 to 100 emu/g. The particles provided have good magnetic characteristics which are maintained with the passage of time even when the particles are subjected to adverse temperature and humidity conditions.
-
公开(公告)号：US4487627A
公开(公告)日：1984-12-11
申请号：US547618
申请日：1983-11-01
申请人： Shizuo Umemura , Tatsuji Kitamoto
发明人： Shizuo Umemura , Tatsuji Kitamoto
摘要： 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 the surface of oxide particles, and reducing the oxide particles in a reducing gas under heating. The ferromagnetic metal particles provided have good acicular shape and a large specific surface area.
摘要翻译： 公开了制备铁磁性金属颗粒的方法。 该方法包括在非还原性气体中，在不降低500℃的温度下，在非还原性气体中脱氢形成主要由铁组成的羟基氧化物颗粒，形成氧化物颗粒，在氧化物颗粒的表面上提供硅化合物，还原氧化物颗粒的还原 气体在加热。 所提供的铁磁性金属颗粒具有良好的针状和比表面积。
-
公开(公告)号：US4439795A
公开(公告)日：1984-03-27
申请号：US329098
申请日：1981-12-09
申请人： Tatsuji Kitamoto , Goro Akashi
发明人： Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/70626 , Y10T428/12049
摘要： 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. or less and a length to width ratio of greater than 1/1 but not greater than 3/1, and the ferromagnetic particles in an underlying layer have a length to width ratio of more than 3/1.
摘要翻译： 描述了在非磁性基底上形成至少两个磁性层的磁记录介质，每个磁性层包含分散在粘合剂中的铁磁颗粒，其中最外层中的铁磁颗粒具有0.3μm或更小的平均长度 并且长宽比大于1/1但不大于3/1，底层中的铁磁颗粒的长宽比大于3/1。
-
公开(公告)号：US4368237A
公开(公告)日：1983-01-11
申请号：US38620
申请日：1979-05-14
申请人： Yasuyuki Yamada , Tatsuji Kitamoto , Goro Akashi
发明人： Yasuyuki Yamada , Tatsuji Kitamoto , Goro Akashi
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31511 , Y10T428/31609 , Y10T428/31725 , Y10T428/31935
摘要： 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 therein in the separated state, and a ferromagnetic powder on a non-magnetic support, drying the coating, and curing the resulting magnetic recording layer where drying is insufficient to effect curing. Hazards ascribable to the use of organic solvents in conventional techniques can be obviated by this invention.
摘要翻译： 具有优异的耐磨性和热稳定性的磁记录材料通过涂覆基本上由至少两种混合后能够彼此反应并且以分离状态存在的树脂粘合剂的水乳液组成的磁性涂料组合物， 铁磁粉末在非磁性载体上，干燥涂层，并固化所得到的磁记录层，其中干燥不足以实现固化。 本发明可以避免归因于常规技术中使用有机溶剂的危害。
-
公开(公告)号：US4250225A
公开(公告)日：1981-02-10
申请号：US927037
申请日：1978-07-24
CPC分类号： G11B5/858 , H01F10/14 , Y10S428/90 , Y10T428/265 , Y10T428/269 , Y10T428/31681 , Y10T428/31692 , Y10T428/31699 , Y10T428/31703
摘要： 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 the surface of the substrate by an electroless plating method.
摘要翻译： 通过包括用辉光放电对塑料基板的表面进行处理，然后对基板进行表面活化处理并在基板的表面上形成磁性金属镀层的方法来制造粘合性和表面性质优异的磁记录介质， 化学镀方法。
-
-
-
-
-
-
-
-
-
搜索结果
76 条记录 (耗时 0.024 秒)
