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    • 25. 发明授权
    • Information recording medium and recording/reproducing method for
utilizing the same
    • 信息记录媒体及其利用方法
    • US5943180A
    • 1999-08-24
    • US773131
    • 1996-12-26
    • Yuzo SeoHiroyuki Ikeda
    • Yuzo SeoHiroyuki Ikeda
    • G11B5/584G11B21/08G11B21/10
    • G11B21/10G11B21/081G11B5/584
    • An information recording medium and method arranges a plurality of information recording tracks in parallel to a running direction of an information recording medium and divides the tracks into a plurality of data blocks, and a servo-burst section between the data blocks. The servo-burst section has, alternately servo-burst-signal recording sections and servo-burst-signal non-recording section. The position of a recording/reproducing head is controlled by using a plurality of recording/reproducing head gaps provided in the head and detecting positional deviations of the head gaps from the centers of the information recording tracks. The deviations are detected from intensity changes of signals from the servo-burst-signal recording sections. The head position control is performed such that at least one of the two head gaps is located at a position to reproduce a signal from both of the servo-burst-signal recording section and the servo-burst-signal non-recording section simultaneously The placement of the servo-burst-signal recording/non-recording sections with respect to head gaps results in a ratio of the signals of the head gap located corresponding to the servo-burst-signal recording section with respect to the signal of the head gap located corresponding to the servo-burst-signal non-recording section as being a predetermined ratio.
    • 信息记录介质和方法将多个信息记录磁道与信息记录介质的运行方向并行布置,并将磁道划分成多个数据块,以及数据块之间的伺服突发部分。 伺服突发部分具有交替的伺服突发信号记录部分和伺服突发信号非记录部分。 记录/再现头的位置通过使用设置在头部中的多个记录/再现头间隙来控制,并且检测头间隙与信息记录轨道的中心的位置偏差。 根据来自伺服突发信号记录部分的信号的强度变化来检测偏差。 执行头部位置控制,使得两个头部间隙中的至少一个位于从伺服突发信号记录部分和伺服突发信号非记录部分同时再现信号的位置。放置 相对于磁头间隙的伺服突发信号记录/非记录部分的相对于伺服突发信号记录部分所对应的磁头间隙的信号相对于磁头间隙的信号的比率 对应于伺服突发信号非记录部分为预定比率。
    • 27. 发明授权
    • Charge controller, toner binder composition and electrophotographic toner
    • 充电控制器,调色剂粘合剂组合物和电子照相调色剂
    • US5460915A
    • 1995-10-24
    • US261034
    • 1994-06-14
    • Hideo NakanishiTohru OhamaHiroyuki IkedaNaoki TakaseAkira Kodani
    • Hideo NakanishiTohru OhamaHiroyuki IkedaNaoki TakaseAkira Kodani
    • G03G9/087G03G9/097
    • G03G9/08786G03G9/08788G03G9/08791G03G9/08795G03G9/08797Y10S430/105
    • A charge controller for an electrophotographic toner is disclosed which comprises a graft or block copolymer comprising:(a) a polymer moiety having an alkyl group containing 6-50 carbon atoms and a carboxyl group, said moiety being selected from the group consisting of: a moiety of a polymer or a copolymer containing at least 5 mol. % of monomer units of a monoalkyl ester of an .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid, containing 6-50 carbon atoms in the alkyl group; and a moiety of a copolymer containing 5-75 mol. % of monomer units of a carboxylic group-containing .alpha.,.beta.-ethylenically unsaturated monomer, and 6-80 mol. % of monomer units of an ethylenically unsaturated monomer having an alkyl group containing 6-50 carbon atoms; and(b) a polymer moiety, bound graft-wise or block-wise thereto, said moiety (b) being selected from the group consisting of a styrenic polymer moiety, and a polyester moiety.The charge controller of the present invention can be used for an electrophotographic toner charging negatively by combining it with a toner binder and a colorant. As a charge controller of the invention has an excellent dispersing property in the toner, the toner is excellent in such properties as the electrostatic charge, the charging rate and transparency in using a color toner.
    • 公开了一种用于电子照相调色剂的电荷控制器,其包含接枝或嵌段共聚物,其包含:(a)具有含有6-50个碳原子的烷基和羧基的聚合物部分,所述部分选自: 聚合物或共聚物的部分含有至少5mol。 %烷基中含有6-50个碳原子的α,β-烯属不饱和二羧酸的单烷基酯的单体单元% 和含有5-75mol的共聚物的部分。 %的含羧基的α,β-烯属不饱和单体的单体单元,和6-80mol。 %具有含有6-50个碳原子的烷基的烯属不饱和单体的单体单元%; 和(b)聚合物部分,其接枝或嵌段结合,所述部分(b)选自苯乙烯聚合物部分和聚酯部分。 本发明的电荷控制器可以通过将其与调色剂粘合剂和着色剂组合而用于负电荷的电子照相调色剂。 作为本发明的电荷控制器,在调色剂中具有优异的分散性,因此调色剂在使用彩色调色剂时的静电电荷,充电速率和透明度等性能优异。