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    • 3. 发明授权
    • Process for producing lactides and process for purifying crude lactides
    • 制备丙交酯的方法和粗制丙交酯的纯化方法
    • US5463086A
    • 1995-10-31
    • US207197
    • 1994-03-08
    • Kazuomi KubotaYoichi Murakami
    • Kazuomi KubotaYoichi Murakami
    • C07D319/12C07D319/00
    • C07D319/12
    • A process for producing a meso-compound-containing lactide, comprising thermally decomposing a hydroxycarboxylic acid oligomer in the presence of a salt of an alkali metal except sodium and in the presence or absence of a metal of the groups 4 to 15 of the periodic table and/or a salt thereof; and a process for purifying a crude lactide comprising recrystallizing a crude lactide using a poor solvent and a good solvent selected from aliphatic tertiary alcohols, ketones and esters are disclosed. The production ratio of a meso-lactide can be controlled by selection of the kind and the amount of a catalyst so as to obtain a lactide having an appropriate optical purity suitable for production of biodegradable polymers. The purification process achieves a high recovery.
    • 一种含有含内消旋化合物的丙交酯的制造方法,其特征在于,在除了钠以外的碱金属盐和存在或不存在周期表第4〜15族金属的情况下,热分解羟基羧酸低聚物 和/或其盐; 公开了使用不良溶剂和选自脂族叔醇,酮和酯的良溶剂重结晶粗丙交酯的粗丙交酯的纯化方法。 可以通过选择催化剂的种类和量来控制内消旋丙交酯的生产比例,从而获得具有适合于生产可生物降解的聚合物的适当光学纯度的丙交酯。 净化过程达到高回收率。
    • 5. 发明申请
    • CONNECTOR
    • 连接器
    • US20070287320A1
    • 2007-12-13
    • US11759735
    • 2007-06-07
    • Koji ShiotaYoichi Murakami
    • Koji ShiotaYoichi Murakami
    • H01R13/627
    • H01R12/79H01R12/89
    • A connector includes a housing in which a recess having an opening on a rear face is provided, and a slider to be slid in the recess. A flexible substrate is inserted in the recess with the slider so that a contact on the flexible substrate is connected to a contact on the housing. On both sides of the slider, a pair of lock arms are provided for fixing the slider to the housing when the slider is fitted in the housing. Parts of the respective lock arms in the recess are exposed out of the housing at portions near both sides of the upper face of the housing when the slider is fitted in the housing, and either of the lock arms in the recess are not exposed out of the housing when the slider is not fitted in the housing. Each portion of the housing where each lock arm is exposed is provided near a corner portion where the upper face, a side face, and a front face of the housing are perpendicularly connected to each other.
    • 连接器包括:壳体,其中设置有在后表面上具有开口的凹部以及在凹部中滑动的滑块。 柔性基板通过滑块插入到凹部中,使得柔性基板上的触点连接到壳体上的触点。 在滑块的两侧设置有一对锁定臂,用于当滑块安装在壳体中时将滑块固定到壳体。 当滑块安装在壳体中时,位于凹槽中的相应锁定臂的部分暴露在外壳的靠近壳体上表面两侧的部分处,并且凹槽中的任一个锁定臂都不会露出 当滑块未安装在外壳中时,外壳。 每个锁定臂暴露的壳体的每个部分设置在壳体的上表面,侧面和前表面彼此垂直连接的角部附近。
    • 10. 发明授权
    • Buried servo magnetic head
    • 埋地伺服磁头
    • US5021910A
    • 1991-06-04
    • US488836
    • 1990-03-06
    • Yoichi Murakami
    • Yoichi Murakami
    • G11B5/127G11B5/48G11B5/596
    • G11B5/596G11B5/4886G11B5/5965
    • A device for reading servo information from a medium in a buried servo magnetic head system. The device consists of a coil for reading/writing data in the medium and a coil for reading the low-frequency servo signal, both coils being wound around the same core. The servo coil has a greater number of turns than the read/write coil which results in the servo signal having a lower resonance frequency than the read/write signal. By obtaining a separate read/write signal and a servo signal produced from a single core in a single head, physical positional errors are avoided without sacrificing the optimization of the separate signals.
    • 一种用于从埋藏伺服磁头系统中的介质读取伺服信息的装置。 该装置由用于在介质中读取/写入数据的线圈和用于读取低频伺服信号的线圈组成,两个线圈缠绕在相同的芯上。 伺服线圈的匝数比读/写线圈大,导致伺服信号的谐振频率低于读/写信号。 通过在单个磁头中获得从单个磁芯产生的单独的读取/写入信号和伺服信号,避免了物理位置误差而不牺牲单独信号的优化。