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    • 3. 发明授权
    • Method and apparatus for securing uniformity and solidity in liquid jet
electrostatic applicators using random droplet formation processes
    • 使用随机液滴形成方法确保液体喷射静电涂布器的均匀性和固化性的方法和装置
    • US4650694A
    • 1987-03-17
    • US729412
    • 1985-05-01
    • John L. DresslerBobby L. McConnellMichael I. GlennJoseph P. Holder
    • John L. DresslerBobby L. McConnellMichael I. GlennJoseph P. Holder
    • B05D1/04B05B5/025B05B5/08B05B5/14B05B5/16D06B11/00
    • D06B11/0059
    • Uniform application of a controlled relatively small liquid volume per unit area to a moving fabric substrate is obtained even though application is made using a liquid jet electrostatic applicator which employs random drop formation processes. Repetitive print times during which randomly formed droplets are passed onto the substrate along a linear orifice array are controlled so as to have a minimum duration sufficiently large as to average out expected random variation in droplet formation processes occurring along the orifice array. At the same time, the center-to-center spacing of each printed pixel (during which randomly formed droplets are intercepted so as not to fall onto the substrate) is controlled so as to maintain a desired relatively small controlled liquid volume per unit area within the fabric substrate section to be printed. In one exemplary embodiment, the print times are maintained in excess of approximately 200 microseconds and/or so as to insure that the expected standard deviation of liquid volume printed onto the substrate during each print time is less than approximately 0.2.
    • 即使使用采用随机液滴形成方法的液体喷射静电涂布器进行应用,也可以获得将每单位面积受控的相对小的液体体积均匀地应用到移动的织物基底。 控制随机形成的液滴沿着线性孔阵列传递到基底上的重复打印时间,以具有足够大的最小持续时间,以平均沿着孔阵列发生的液滴形成过程中的预期随机变化。 同时,控制每个印刷像素的中心到中心的间隔(在其间随机形成的液滴被截取以便不落在基底上),以便在每个单位面积内保持所需的相对小的受控液体体积 要印刷的织物基材部分。 在一个示例性实施例中,打印时间保持超过约200微秒和/或等等,以确保在每个打印时间期间印刷到基板上的液体体积的预期标准偏差小于约0.2。
    • 4. 发明授权
    • Clean air hood for fluid jet printing
    • 用于流体喷射打印的清洁空气罩
    • US4875054A
    • 1989-10-17
    • US54490
    • 1987-05-27
    • Timothy H. V. ArcherRandy BowmanMichael I. Glenn
    • Timothy H. V. ArcherRandy BowmanMichael I. Glenn
    • B41J2/20
    • B41J2/20
    • Disclosed is a clean air hood for disposition above the print head of a fluid jet printing apparatus having an orifice plate on one side of the print head for forming a plurality of droplet streams. The droplet streams flow past charge and deflection electrode means as well as a fluid catcher whereby uncharged droplets are deposited on a substrate. The clean air hood includes an interior baffle for directing clean air through the hood for issuance through a pair of laterally spaced slots along opposite sides of the hood whereby the air curtains formed thereby straddle the print head. In operation, the air curtains flow along opposite sides of the print head and opposite sides of the droplet streams ot maintain a clean air region about the electrode means and dampen any tendency of particulate matter carried by the substrate from migrating into the region of the electrodes. The print bar is rotated 180.degree. to locate the orifice plate in opposition to the opening through the lower end of the hood whereby the orifice plate may be changed in a clean air region.
    • 公开了一种用于配置在喷墨打印设备的打印头上方的清洁空气罩,在打印头的一侧具有用于形成多个液滴流的孔板。 液滴流流过电荷和偏转电极装置以及流体捕获器,由此在基底上沉积不带电的液滴。 清洁空气罩包括内部挡板,用于引导清洁空气通过发动机罩,通过沿着罩的相对侧的一对横向间隔开的狭槽,由此形成的气帘跨过打印头。 在操作中,气帘沿着打印头的相对侧流动,并且液滴流的相对侧保持围绕电极装置的清洁空气区域并且抑制由基板携带的颗粒物质迁移到电极区域的任何趋势 。 打印条旋转180°以将孔板定位成与通过罩的下端的开口相对,从而孔板可以在清洁的空气区域中改变。
    • 5. 发明授权
    • Tensionable ground electrode for fluid-jet marking apparatus
    • 用于流体喷射打标设备的可张力接地电极
    • US4736209A
    • 1988-04-05
    • US934967
    • 1986-11-25
    • Michael I. GlennBruce W. HallidayRichard Sutera
    • Michael I. GlennBruce W. HallidayRichard Sutera
    • B41J2/085B41J2/09B05B5/00
    • B41J2/085B41J2/09
    • An electrode for use in a fluid-jet marking apparatus includes a flexible and tensionable electrode member mounted in confronting, substantially parallel alignment to a linear array of fluid droplet streams. The mounting of the flexible and tensionable electrode member is accomplished by a pair of mounting arms in spaced-apart relationship, one of the arms being pivotal while the other arm is immovable. The one pivotal arm is thus displaced relative to the other immovable arm so as to responsively tension the electrode member therebetween.In order to increase the vibrational frequency of the flexible and tensionable electrode member and/or to substantially decrease the vibrational amplitude thereof, at least one intermediate arm having a terminal end in operative contact with the electrode member is provided. The contact of the terminal end of the intermediate arm occurs at least one location along the electrode member between the pair of spaced-apart mounting arm members and thus essentially shortens the "free length" of the electrode member so that vibrational frequency of the electrode member is substantially increased thereby responsively substantially decreasing the vibrational amplitude of the electrode member towards and away from the droplet streams. In such a manner, the electrode member can be closely positioned laterally of the droplet streams.An alternative embodiment of the electrode structure employs an additional flexible and tensionable ground electrode ("ground shield") preferably composed of a flexible ribbon of electrically conductive material disposed directly beneath the deflection electrode and in a substantially opposed confronting relationship to the droplet catching structure.
    • 用于流体喷射打标设备的电极包括安装成与流体液滴流的线性阵列相对的基本上平行对准的柔性和可张紧的电极部件。 柔性和可张紧的电极部件的安装通过一对隔开关系的安装臂实现,其中一个臂是枢转的,而另一个臂是不可移动的。 因此,一个枢转臂相对于另一个不可移动的臂移位,以便响应地在其间张紧电极构件。 为了增加柔性和可张紧的电极部件的振动频率和/或大幅降低其振动振幅,提供了至少一个具有与电极部件工作接触的端部末端的中间臂。 中间臂的末端的接触在电极构件的一对间隔开的安装臂构件之间发生至少一个位置,因此基本上缩短了电极构件的“自由长度”,使得电极构件的振动频率 基本上增加,从而响应地大大降低了电极构件朝向和远离液滴流的振动振幅。 以这种方式,电极构件可以紧密地定位在液滴流的侧面。 电极结构的替代实施例使用优选由导电材料的柔性带构成的附加的柔性和可张紧的接地电极(“接地屏蔽”),其直接设置在偏转电极下方并且与液滴捕获结构基本相对的对置关系。