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    Acoustic ink printing
    4.
    发明公开
    Acoustic ink printing 失效
    Akustischer Tintendrucker。

    公开(公告)号：EP0493102A1

    公开(公告)日：1992-07-01

    申请号：EP91312001.0

    申请日：1991-12-23

    申请人： XEROX CORPORATION

    发明人： Hadimioglu, Babur B. ,  Khuri-Yakub, Butrus T. ,  Quate, Calvin P.

    IPC分类号： B41J2/04

    CPC分类号： B41J2/14008 ,  B41J2002/14322

    摘要： This invention is an acoustic ink printer a pool of ink (33) with a free surface (36). Underneath the ink is a print head (10) which has droplet ejectors (14) for irradiating the free surface (36) of the pool of ink (33) with focused acoustic radiation (44). Over the free surface (36) of the pool of ink (33) is a membrane (16), with an aperture (20) aligned with each droplet ejector (14), in intimate contact with the free surface (36) of the pool of ink (33). The apertures (20) are substantially larger than the waist diameter (46) of the focused acoustic radiation (44). An external pressure source (50) maintains the meniscus (48) of the pool of ink (33) substantially in the focal plane (52) of the focused acoustic radiation (44) during operation of the droplet ejectors (14). A piezoelectric crystal (24) is in intimate contact with the pool of ink (33). An electrical signal source (32) energizes the piezoelectric crystal (24) in order to apply a pressure signal (54) on demand to the pool of ink (33) during operation of the droplet ejectors (14). The different pressure signals (54) resulting from application of different electrical signals (29) to the piezoelectric crystal (24) can be utilized to eject individual droplets (38) of ink (33) from the free surface (34) of the ink (33) on demand, or to effect finer control over the free surface (34) of the ink (33) than is possible with the external pressure source (50) by itself.

    摘要翻译： 本发明是具有自由表面（36）的油墨池（33）的声学墨水打印机。 油墨下方是具有液滴喷射器（14）的打印头（10），用于用聚焦声辐射（44）照射墨水池（33）的自由表面（36）。 在墨水池（33）的自由表面（36）上是膜（16），其中孔（20）与每个液滴喷射器（14）对准，与池的自由表面（36）紧密接触 的墨水（33）。 孔（20）基本上大于聚焦的声辐射（44）的腰部直径（46）。 在液滴喷射器（14）的操作期间，外部压力源（50）基本上保持聚焦声辐射（44）的焦平面（52）中的墨水池（33）的弯月面（48）。 压电晶体（24）与油墨池（33）紧密接触。 电信号源（32）激励压电晶体（24），以在液滴喷射器（14）的操作期间根据需要对墨水池（33）施加压力信号（54）。 由不同的电信号（29）施加到压电晶体（24）而产生的不同的压力信号（54）可用于从油墨的自由表面（34）喷出墨水（33）的单个液滴（38） 或者与外部压力源（50）本身相比可以对油墨（33）的自由表面（34）进行更好的控制。

    Acoustic ink printing
    6.
    发明公开
    Acoustic ink printing 失效
    Akustischer Tintendrucker。

    公开(公告)号：EP0400955A2

    公开(公告)日：1990-12-05

    申请号：EP90305805.5

    申请日：1990-05-29

    申请人： XEROX CORPORATION

    发明人： Khuri-Yakub, Butrus T. ,  Elrod, Scott A. ,  Quate, Calvin F. ,  Rawson, Eric G. ,  Hadimioglu, Babur B.

    IPC分类号： B41J2/015

    CPC分类号： B41J2/14008 ,  B41J2002/14322

    摘要： An acoustic ink printer (10) comprises a pool of liquid ink (14) having a free surface in intimate contact with the inner face of a perforated membrane (32). The printer (10) addresses all pixel positions within its image field via substantially-uniform, relatively large diameter apertures (33) which extend through the membrane (32) on centers that are aligned with respective ones of the pixel positions. In operation, one or more focused acoustic beams (16) selectively eject individual droplets of ink from the ink menisci that extend across the apertures (33). Accordingly, the membrane (32) is positioned, and the bias pressure applied (14) to the ink is selected, so that the menisci essentially remain within the focal plane of such beam or beams (16).

    摘要翻译： 声音墨水打印机（10）包括具有与多孔膜（32）的内表面紧密接触的自由表面的液体墨水池（14）。 打印机（10）通过基本上均匀的相对较大直径的孔（33）来解决其图像场内的所有像素位置，孔径（33）在与像素位置中的相应位置对准的中心处延伸穿过膜（32）。 在操作中，一个或多个聚焦声束（16）选择性地从穿过孔（33）延伸的油墨半月板喷射墨滴。 因此，膜（32）被定位，并且选择施加到油墨上的偏压（14），使得半月板基本上保持在这种梁或梁（16）的焦平面内。

    Spatially addressable capillary wave droplet ejectors
    7.
    发明公开
    Spatially addressable capillary wave droplet ejectors 失效
    空间可寻址的毛细波浪喷雾器

    公开(公告)号：EP0243117A3

    公开(公告)日：1988-12-07

    申请号：EP87303412

    申请日：1987-04-16

    申请人： XEROX CORPORATION

    发明人： Elrod, Scott Alan ,  Khuri-Yakub, Butrus T. ,  Quate, Calvin F.

    IPC分类号： B41J03/04

    CPC分类号： B41J2/065 ,  B41J2002/14322 ,  G10K11/36

    摘要： Provision is made for selectively addressing individual crests (64) of traveling or standing capillary surface waves (62) to eject droplets from the selected crests on command. To that end, the addressing mechanisms (65, 85) of this invention locally increase the surface pressure acting on the selected crests and/or locally reduce the surface tension of the liquid within the selected crests. The preferred addressing mechanisms have sufficient spatial resolution to address a single crest substantially independently of its neighbors. Discrete addressing mechanisms having a plurality of individual addressing elements (85) are especially attractive for liquid ink printing and similar applications, not only because their individual addressing elements may be spatially fixed, but also because the spatial frequency of their addressing elements may be matched to the spatial frequency (wavelength λc) of the capillary wave. Such frequency matching enables selected crests of the capillary wave to be addressed in parallel, such as for line printing. Preferably, the capillary wave for a printer is a spatially stabilized standing wave, so that the crests and troughs of the capillary wave are locked in predetermined spatial locations.

    Stabilization of the free surface of a liquid
    9.
    发明公开
    Stabilization of the free surface of a liquid 失效
    液体自由表面的稳定性

    公开(公告)号：EP0572220A3

    公开(公告)日：1994-05-18

    申请号：EP93304048.7

    申请日：1993-05-25

    申请人： XEROX CORPORATION

    发明人： Elrod, Scott A. ,  Khuri-Yakub, Butrus T. ,  Quate, Calvin F.

    IPC分类号： B41J2/04 ,  B41J2/065

    CPC分类号： B41J2/14008 ,  B41J2002/14322

    摘要： Techniques for obtaining an ejection rate independent, spatial relationship between an acoustic focal area and the free surface (12) of a liquid (14). Variations in the spatial relationship are reduced or eliminated by applying substantially the same acoustic energy to the liquid's free surface (12) during periods when droplets (20) are not ejected as when they are, but at power levels insufficient to eject a droplet (20). During ejection periods in which a droplet is not ejected, the acoustic energy is applied at a lower level, but for a longer time. Because it is more convenient to measure and control, the transducer (26) drive voltage is used to control the acoustic energy applied to the liquid's free surface (12).