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    • 31. 发明授权
    • Process for producing a magnetic recording medium
    • 磁记录介质的制造方法
    • US5045351A
    • 1991-09-03
    • US423290
    • 1989-10-18
    • Tsutomu OkitaYasuo NishikawaHiroshi HashimotoHideomi Watanabe
    • Tsutomu OkitaYasuo NishikawaHiroshi HashimotoHideomi Watanabe
    • G11B5/702
    • G11B5/7022
    • A process for producing a magnetic recording medium which comprises a step of kneading a ferromagnetic powder with a binder in the presence of a solvent, a step of dispersing the resulting blend with the binder and/or solvent, and a step of coating the resulting magnetic coating composition on a nonmagnetic support followed by drying;Wherein said step of kneading is carried out by kneading a ferromagnetic powder having a particle size of not more than 350 .ANG. with a glycidyl compound and a binder comprising at least a vinyl chloride copolymer having an OH- terminated side chain bonded via an organic group and also having a polar group and/or a solvent; said binder, polyurethane resin, and solvent being used in a total amount of from 40 to 70 parts by weight per 100 parts by weight of said ferromagnetic powder; and wherein said step of dispersing is carried out in the presence of additional polyurethane resin having a polar group and/or solvent.
    • 一种制造磁记录介质的方法,包括在溶剂存在下将铁磁性粉末与粘合剂混合的步骤,用粘合剂和/或溶剂分散所得共混物的步骤,以及涂覆所得磁性 涂覆组合物在非磁性载体上,然后干燥; 其中所述捏合步骤是通过将具有不超过350埃格姆的粒度的铁磁性粉末与缩水甘油基化合物和包含至少一种具有通过有机基团键合有OH-封端的侧链的氯乙烯共聚物的粘合剂进行的,以及 也具有极性基团和/或溶剂; 所述粘合剂,聚氨酯树脂和溶剂的使用总量为每100重量份所述铁磁粉末为40至70重量份; 并且其中所述分散步骤在具有极性基团和/或溶剂的另外的聚氨酯树脂的存在下进行。
    • 32. 发明授权
    • Method for manufacturing a magnetic recording medium
    • 磁记录介质的制造方法
    • US4937098A
    • 1990-06-26
    • US340743
    • 1989-04-20
    • Yasuo NishikawaMikio OhnoMasaaki FujiyamaTsutomu Okita
    • Yasuo NishikawaMikio OhnoMasaaki FujiyamaTsutomu Okita
    • G11B5/842G11B5/712H01F1/06
    • G11B5/712Y10S428/90
    • 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.
    • 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。
    • 35. 发明授权
    • Resonant optical scanner using vibrating body with optimized resonant frequency characteristics and image forming apparatus having the same
    • 谐振光学扫描仪采用具有优化的谐振频率特性的振动体和具有该共振频率特性的成像装置
    • US07639413B2
    • 2009-12-29
    • US11526734
    • 2006-09-26
    • Yasuo NishikawaNobuaki Asai
    • Yasuo NishikawaNobuaki Asai
    • G02B26/08
    • G02B7/1821B81B3/0094B81B2203/0109G02B26/105H04N1/113
    • An apparatus for use in optical scanning is disclosed which vibrates at least a part of a vibrating body having a light-reflective surface, to thereby allow light, upon entry, to be reflected from the light-reflective surface in varying directions. The vibrating body includes: (a) a reflective mirror having the light-reflective surface; and (b) an integral spring extending from the reflective mirror and being excited to generate at least a torsional vibration. The vibrating body has vibrational characteristics in which whether or not a resonant frequency of the torsional vibration and a resonant frequency of a disturbing vibration are equal to each other depends upon a shape-defining parameter for defining a shape of the integral spring extending lengthwise. The shape-defining parameter is pre-set to fall within a range allowing the resonant frequency of the torsional vibration and the resonant frequency of the disturbing vibration to be different from each other.
    • 公开了一种用于光学扫描的装置,其振动具有光反射表面的振动体的至少一部分,从而允许入射时的光在变化的方向上从光反射表面反射。 振动体包括:(a)具有光反射表面的反射镜; 和(b)从反射镜延伸并被激发以产生至少扭转振动的整体弹簧。 振动体具有振动特性,其中扭转振动的共振频率和干扰振动的共振频率是否彼此相等取决于用于限定纵向延伸的整体弹簧的形状的形状限定参数。 形状定义参数被预先设定为允许扭转振动的共振频率和扰动振动的共振频率彼此不同的范围。
    • 37. 发明授权
    • Metal thin film magnetic recording medium having a silicone compound
protective layer
    • 具有硅氧烷化合物保护层的金属薄膜磁记录介质
    • US5527617A
    • 1996-06-18
    • US363993
    • 1994-12-27
    • Yasuo NishikawaHiroshi Fukui
    • Yasuo NishikawaHiroshi Fukui
    • G11B5/72C09D183/04C10M107/50C10N40/18G11B5/64G11B5/725G11B5/73G11B5/00
    • G11B5/722G11B5/725Y10S428/90Y10T428/31663Y10T428/31678
    • A metal thin layer type magnetic recording medium is disclosed, comprising a non-magnetic support having formed thereon (1) a ferromagnetic metal thin layer or (2) a ferromagnetic metal thin layer and a protective layer formed on the ferromagnetic metal thin layer, wherein a layer comprising a polymer of at least one chain or cyclic silicone compound which is formed on the surface of the ferromagnetic metal thin layer or the protective layer by bringing the silicone compound into contact with the surface in the vapor phase is provided on the surface; the atomic number ratio (Si.sub.2p /Co.sub.2p.sup.3/2) of Si in the polymer is from 0.02 to 0.30; and the silicone compound is represented by formula (I):(R.sup.1 HSiO).sub.a (R.sup.2 R.sup.3 SiO).sub.b (R.sup.4 R.sup.5 R.sup.6 SiO.sub.1/2).sub.c (I)wherein R.sup.1, R.sup.2, and R.sup.3 each represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having from 1 to 10 carbon atoms, R.sup.1, R.sup.2, and R.sup.3 simultaneously are not a hydrogen atom; R.sup.4, R.sup.5, and R.sup.6 each represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having from 1 to 10 carbon atoms; a and b each represents an integer of 0 or more; and c represents 0 or 2, when c is 0, the silicone compound is a cyclic compound, when c is 2, the silicone compound is a chain compound, and when c is 0, the sum of a and b is an integer of at least 3.
    • 公开了一种金属薄层型磁记录介质,包括其上形成有非磁性载体(1)铁磁金属薄层或(2)强磁性金属薄层和形成在强磁性金属薄层上的保护层,其中 在表面上设置包含至少一种链状或环状硅氧烷化合物的聚合物的层,该聚合物通过使硅酮化合物与气相的表面接触而形成在强磁性金属薄层或保护层的表面上; 聚合物中Si的原子数比(Si2p / Co2p3 / 2)为0.02〜0.30; 硅氧烷化合物由式(I)表示:(R1HSiO)a(R2R3SiO)b(R4R5R6SiO1 / 2)c(Ⅰ)其中R1,R2和R3各自表示氢原子或取代或未取代的烃基, 1至10个碳原子,R1,R2和R3同时不是氢原子; R4,R5和R6各自表示氢原子或取代或未取代的碳原子数为1〜10的烃基; a和b各自表示0以上的整数, c为0或2,当c为0时,硅氧烷化合物为环状化合物,c为2时,硅氧烷化合物为链状化合物,当c为0时,a与b的和为 至少3。