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    • 54. 发明授权
    • Substituted squarylium dyes, and processes and intermediates for the
preparation thereof
    • 取代的方酸菁染料,以及其制备方法和中间体
    • US5227499A
    • 1993-07-13
    • US795341
    • 1991-11-20
    • Donald A. McGowanMark R. MischkeStephen J. Telfer
    • Donald A. McGowanMark R. MischkeStephen J. Telfer
    • B41M5/26B41M5/385B41M5/392B41M5/46C07D311/58C07D335/02C07D335/06C07D345/00C07D409/08C09B57/00
    • B41M5/465C07D311/58C07D335/02C07D335/06C07D345/00C07D409/08C09B57/007B41M5/26B41M5/3854B41M5/392
    • Squarylium compounds of the formula: ##STR1## in which: Q.sup.1 and Q.sup.2 are each a Chromophoric group having an unsaturated system conjugated with the squarylium ring and such that in the compounds of formulae Q.sup.1 CH.sub.2 R.sup.1 and Q.sup.2 CH.sub.2 R.sup.2 the methylene hydrogens are active hydrogens;R.sup.1 and R.sup.2 are each independently a hydrogen atom or an aliphatic or cycloaliphatic group; andR.sup.3, R.sup.4 and R.sup.5 are each independently a hydrogen atom, or an aliphatic, cycloaliphatic, aromatic or heterocyclic group, or an electron-withdrawing group able to lower the electron density at the carbon atom to which it is attached, subject to the provisoes that:two of R.sup.3, R.sup.4 and R.sup.5 may form a divalent group of which a single atom is double bonded to the carbon atom to which the two groups are attached, or all three of R.sup.3, R.sup.4 and R.sup.5 may form a trivalent group of which a single atom is triple bonded to the carbon atom to which the three groups are attached, ortwo of R.sup.3, R.sup.4 and R.sup.5 may, together with the carbon atom to which they are attached, form a ring, or all three of R.sup.3, R.sup.4 and R.sup.5 may, together with the carbon atom to which they are attached, form an unsaturated ring,are useful as near infra-red absorbers. The presence of the --CR.sup.3 R.sup.4 R.sup.5 group on the squarylium ring enables changes in absorption wavelength to be achieved by modifications of this group, and also allows functional groups to be incorporated into the dye without changing the chromophoric groups.
    • 下式的方酸化合物:其中:Q1和Q2各自是具有与方酸环结合的不饱和系统的发色团,并且在式Q1CH2R1和Q2CH2R2的化合物中,亚甲基氢是活性氢; R1和R2各自独立地为氢原子或脂族或脂环族基团; 并且R 3,R 4和R 5各自独立地为氢原子,或脂族,脂环族,芳族或杂环基团或能够降低其所连接的碳原子处的电子密度的吸电子基团,条件是 其中:R 3,R 4和R 5中的两个可以形成其中单个原子与两个基团连接的碳原子双键的二价基团,或者所有三个R 3,R 4和R 5可以形成三价基团,其中 单个原子与三个基团连接的碳原子三键键合,或者R 3,R 4和R 5中的两个可以与它们所连接的碳原子一起形成环,或者所有三个R 3,R 4 并且R 5可以与它们所连接的碳原子一起形成不饱和环,可用作近红外吸收剂。 在方圆环上存在-CR3R4R5可以通过改变该组来实现吸收波长的变化,并且还允许在不改变发色基团的情况下将官能团引入染料中。
    • 59. 发明申请
    • PRINT HEAD PULSING TECHNIQUES FOR MULTICOLOR PRINTERS
    • 打印头打印头打印技术
    • US20080238967A1
    • 2008-10-02
    • US12022955
    • 2008-01-30
    • Brian BuschChien LiuStephen J. TelferWilliam T. VetterlingPeter Zelten
    • Brian BuschChien LiuStephen J. TelferWilliam T. VetterlingPeter Zelten
    • B41J29/38
    • B41J2/35B41J2/355B41J2/5056H04N1/3876
    • In one aspect of the invention there is disclosed a multicolor thermal imaging system wherein different heating elements on a thermal print head can print on different color-forming layers of a multicolor thermal imaging member in a single pass. The line-printing time is divided into segments, each of which is divided into a plurality of subintervals. All of the pulses within the segments have the same energy. In one embodiment, every pulse has the same amplitude and duration. Different colors are selected for printing during the different segments by varying the fraction of subintervals that contain pulses. This technique allows multiple colors to be printed using a thermal print head with a single strobe signal line. Pulsing patterns may be chosen to reduce the coincidence of pulses provided to multiple print head elements, thereby reducing the peak power requirements of the print head.
    • 在本发明的一个方面,公开了一种多色热成像系统,其中热打印头上的不同加热元件可以在单次通过中在多色热成像构件的不同成色层上印刷。 行打印时间被划分成段,每个段被分成多个子区间。 段内的所有脉冲具有相同的能量。 在一个实施例中,每个脉冲具有相同的幅度和持续时间。 通过改变包含脉冲的子区间的分数来选择不同的颜色来在不同的段中进行打印。 该技术允许使用具有单个选通信号线的热打印头来打印多种颜色。 可以选择脉冲图案以减少提供给多个打印头元件的脉冲的一致性,从而降低打印头的峰值功率要求。