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    • 15. 发明授权
    • Imprinting apparatus
    • 印刷装置
    • US4769649A
    • 1988-09-06
    • US841925
    • 1986-03-20
    • Katsumori Takei
    • Katsumori Takei
    • B41J2/315B41J2/32B41M5/382G01D15/10G01D15/00
    • B41M5/38285B41J2/315B41J2/32
    • An imprinting apparatus having application means for applying thermal energy to a recording portion of thermoplastic magnetic ink and generation means for simultaneously generating magnetic attraction force in the ink is provided. The recording portion of the ink is transferred to a transfer medium by the magnetic attraction force while the application of thermal energy is controlled. The ink and the transfer medium do not come into contact with each other in a non-recording portion of the ink. An ink medium having a support layer and a thermoplastic magnetic ink layer for use with the imprinting apparatus of the invention is also provided.
    • 提供了一种具有将热能施加到热塑性磁性墨水的记录部分的应用装置和用于同时在墨水中产生磁力吸引力的产生装置的压印装置。 当控制热能的施加时,油墨的记录部分通过磁吸引力转印到转印介质上。 油墨和转印介质在油墨的非记录部分中不会彼此接触。 还提供了具有用于本发明的压印装置的支撑层和热塑性磁性墨水层的油墨介质。
    • 18. 发明授权
    • (2'-Cyano-4'-alkylphenyl)-3-cyano-4-alkoxybenzoates and liquid crystal
composition including same
    • (2'-氰基-4'-烷基苯基)-3-氰基-4-烷氧基苯甲酸酯及其液晶组合物
    • US4287085A
    • 1981-09-01
    • US144809
    • 1980-04-29
    • Katsumori TakeiSadao KanbeYoshio Shionozaki
    • Katsumori TakeiSadao KanbeYoshio Shionozaki
    • C07C51/363C07C65/21C09K19/54C07C121/75C09K3/34
    • C09K19/54C07C51/363C07C65/21
    • Ester compounds suitable for use in liquid crystal compositions are provided. The ester compounds are (2'-cyano-4'-alkylphenyl)-3-cyano-4-n-alkoxybenzoates represented by the general formula: ##STR1## wherein R and R' each is a straight-chain alkyl group having one to eight carbon atoms. The ester compounds alone do not exhibit a liquid crystal phase, but have a relatively low melting point. Addition of at least one such ester compound to a liquid crystal composition lowers the value of the dielectric anisotropy of the composition at frequencies higher than the critical frequency, and lowers it at frequencies lower than the critical frequency. Such compositions are particularly well suited for the two-frequency matrix-addressing drive in a display of complex characters or graphic displays.The ester compounds in accordance with the invention are prepared by condensing a 3-bromo-4-n-alkoxybenzoyl chloride having the general formula: ##STR2## and a 2-cyano-4-n-alkylphenol having the general formula: ##STR3## to prepare a (2'-cyano-4'-n-alkylphenol)-3-bromo-4-n-alkoxybenzoate having the general formula: ##STR4## wherein R and R' each is a straight-chain alkyl group having from one to eight carbon atoms, and reacting the benzoate (IV) with cuprous cyanide to yield the desired ester (I).
    • 提供适用于液晶组合物的酯化合物。 酯化合物是由以下通式表示的(2'-氰基-4'-烷基苯基)-3-氰基-4-正烷基苯甲酸酯:其中R和R'各自为直链烷基 具有1-8个碳原子。 单独的酯化合物不表现出液晶相,但熔点相对较低。 将至少一种这样的酯化合物加入到液晶组合物中,在高于临界频率的频率下降低组合物的介电各向异性的值,并且在低于临界频率的频率下降低组成物的介电各向异性的值。 这样的组合物特别适用于复杂字符或图形显示器的显示器中的双频矩阵寻址驱动器。 根据本发明的酯化合物通过将具有以下通式的3-溴-4-正烷氧基苯甲酰氯与具有以下通式的2-氰基-4-正烷基苯酚缩合制备: (III)制备具有以下通式的(2'-氰基-4'-正烷基苯酚)-3-溴-4-正烷基苯甲酸酯:其中R和R'各自为 具有1至8个碳原子的直链烷基,并使苯甲酸酯(IV)与氰化亚铜反应以产生所需的酯(I)。