公开(公告)号：EP0272155B1

公开(公告)日：1992-07-22

申请号：EP87311226.2

申请日：1987-12-18

申请人： XEROX CORPORATION

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

IPC分类号： B41J2/045

CPC分类号： B41J2/14008 ,  B41J2002/14322

公开(公告)号：EP0493052A2

公开(公告)日：1992-07-01

申请号：EP91311918.6

申请日：1991-12-23

申请人： XEROX CORPORATION

发明人： Sweet, Richard G.

IPC分类号： B41J2/04 ,  B41J2/065

CPC分类号： B41J2/14008 ,  B41J2002/14322

摘要： A nozzleless droplet projection system is disclosed. A thin film of fluid (26) with a constant thickness travels at a constant velocity across a tubular transducer head (16a, 16b). A smooth perimetrical surface (18) is formed between the input (22) and the output (24) sides of the transducer head (16a, 16b). An array of electro-acoustic transducers (15) submerged beneath the transducer head support surface (17) generate tone bursts (20, Figs 3 and 4) of acoustic energy which are focused by a corresponding array of acoustic lenses (19) inscribed along the length of the transducer head (16a, 16b). The constant thickness and constant velocity fluid film (26) is generated by forcing pre-regulated, pressurized fluid through a narrow slit (30) and across the smooth perimetrical surface (18) of the transducer head (16a, 16b). The fluid film (26) is maintained at the acoustic focus of the lenses (19) in order to control the resultant droplet (12) size. A pattern of droplets (12) is ejected by pulsing the appropriate electro-acoustic transducers (15) as the projection medium (14) is moved across the droplet formation apparatus at a constant velocity.

摘要翻译： 公开了一种无喷嘴液滴投影系统。 具有恒定厚度的流体薄膜（26）以恒定速度穿过管状换能器头（16a，16b）。 在换能器头（16a，16b）的输入端（22）和输出端（24）之间形成光滑的周边表面（18）。 浸没在换能器头支撑表面（17）下面的电声换能器阵列（15）产生声能的声调阵列（20，图3和4），声能通过相应阵列的声透镜（19） 换能器头（16a，16b）的长度。 恒定厚度和恒定速度的流体膜（26）通过迫使预调节的加压流体通过窄缝（30）并穿过换能器头（16a，16b）的光滑周边表面（18）而产生。 流体膜（26）保持在透镜（19）的声焦点处，以便控制所得到的液滴（12）的尺寸。 当投影介质（14）以恒定的速度在液滴形成设备上移动时，通过脉冲适当的电声换能器（15）来喷射液滴图案（12）。

公开(公告)号：EP0234718B1

公开(公告)日：1992-03-11

申请号：EP87300507.8

申请日：1987-01-21

申请人： XEROX CORPORATION

发明人： Elrod, Scott Alan

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2002/14322

公开(公告)号：EP0430087A2

公开(公告)日：1991-06-05

申请号：EP90122350.3

申请日：1990-11-22

申请人： SEIKO EPSON CORPORATION

发明人： Hoshino, Masaru, c/o Seiko Epson Corporation ,  Tanizaki, Masanori, c/o Seiko Epson Corporation ,  Nishiwaki, Tsutomu, c/o Seiko Epson Corporation

IPC分类号： B41J2/065

CPC分类号： B41J2/065 ,  B41J2002/14322

摘要： In a nozzleless ink jet printer, a plate-shaped propagation element (11) for propagating a surface acoustic wave is fixedly mounted on a substrate (5) which is arranged along the platen (P) and has an ink pooling groove (5b) and the ink led to the edge (11c) of the propagation element from the ink pooling groove by surface tension is caused to jet in the form of ink mist by surface acoustic waves generated by excitation of comb-shaped interleaved electrodes (21) so as to record images such as characters and patterns on a recording sheet (S).

摘要翻译： 在无喷嘴喷墨打印机中，用于传播表面声波的板状传播元件（11）固定地安装在沿着压板（P）布置的基板（5）上，并且具有储墨槽（5b）和 通过表面张力通过表面张力从墨水槽引导传播元件的边缘（11c）以由梳状交错电极（21）的激发产生的表面声波以墨雾的形式喷射，从而 在记录纸（S）上记录诸如字符和图案的图像。

公开(公告)号：EP0272899A3

公开(公告)日：1989-11-02

申请号：EP87311223.9

申请日：1987-12-18

申请人： XEROX CORPORATION

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

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2/155 ,  B41J2002/14322

摘要： To facilitate the fabrication of acoustic printheads (11), arrays of spherical acoustic lenses (12a-12i) are provided for bringing rf acoustic waves to essentially diffraction-limited foci at or near the free surface of a pool of ink. These lenses (12a-12i) produce focal patterns which are relatively free of localized amplitude variations, so they may be employed to fabricate acoustic printheads (11) having relatively stable characteristics for acoustic printing.

摘要翻译： 为了便于制造声学打印头（11），提供了球形声学透镜阵列（12a-12i），用于将rf声波基本上衍射到墨池自由表面处或其附近的受衍射限制的焦点。 这些透镜（12a-12i）产生相对没有局部幅度变化的聚焦图案，因此它们可以用于制造具有用于声学印刷的相对稳定特性的声学打印头（11）。

公开(公告)号：EP0273664A3

公开(公告)日：1989-05-24

申请号：EP87311224.7

申请日：1987-12-18

申请人： XEROX CORPORATION

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

IPC分类号： B41J2/065 ,  B41J2/205

CPC分类号： B41J2/14008 ,  B41J2/2128 ,  B41J2002/14322

摘要： Provision is made for varying the size of the pixels or spots printed by an acoustic printer of the type in which one or more droplet ejectors (12) are driven by rf voltage pulses to produce focused acoustic beams (22) for ejecting droplets (25) of ink on demand from a free surface (24) of an ink supply (23). It has been found that the size of the individual droplets (25) of ink that are ejected from the free surface (24) of the ink can be varied by modulating the frequency, duration or amplitude of the pulses applied to such a droplet ejector (12). Furthermore, it also has been found that the trajectory along which the ink droplets (25) are propelled from the free surface (24) of the ink supply to a nearby record medium (11) is sufficiently well defined and repeatable that multiple droplets (25) can be deposited on the record medium (11) in rapid sequence, one on top of the other, before the ink has time to dry, to print variable diameter pixels or spots. The control techniques discribed in this application may be employed for variable resolution printing and for imparting a controlled pseudo-gray scale shading to the printed image. Each of the pixels of the printed image may be composed of a single cell for one spot per pixel printing or may be subdivided into a plurality of cells for multiple spot per pixel printing.

摘要翻译： 规定改变由其中一个或多个液滴喷射器（12）由射频电压脉冲驱动以产生用于喷射液滴（25）的聚焦声束（22）的类型的声学打印机打印的像素或点的大小。 从供墨源（23）的自由表面（24）按需供应墨水。 已经发现，通过调节施加到这种液滴喷射器的脉冲的频率，持续时间或幅度，可以改变从墨水的自由表面（24）喷射的墨水的各个液滴（25）的尺寸 12）。 此外，还已经发现，墨滴（25）从墨供应源的自由表面（24）被推进到附近的记录介质（11）所沿着的轨迹被充分确定并且可重复，使得多个液滴（25 ）可以在墨水有时间干燥之前以快速的顺序沉积在记录介质（11）上，一个在另一个之上，以印刷可变直径的像素或斑点。 在本申请中描述的控制技术可以用于可变分辨率印刷和用于向印刷图像传递受控制的伪灰度阴影。 打印图像的每个像素可以由用于每个像素打印的一个点的单个单元构成，或者可以被划分为用于多个点每像素打印的多个单元。

公开(公告)号：EP0243117A2

公开(公告)日：1987-10-28

申请号：EP87303412.8

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： B41J2/065

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.

摘要翻译： 提供了选择性地寻址行进或站立的毛细管表面波（62）的单独波峰（64），以根据命令从所选择的波峰喷射液滴。 为此，本发明的寻址机构（65,85）局部地增加作用在所选择的顶部上的表面压力和/或局部地降低所选择的顶部内的液体的表面张力。 优选的寻址机制具有足够的空间分辨率以基本上独立于其邻居来解决单个波峰。 具有多个单独寻址元件（85）的离散寻址机构对于液体油墨印刷和类似应用尤其有吸引力，不仅因为它们的各自的寻址元件可能是空间固定的，而且由于它们的寻址元件的空间频率可以匹配 毛细血管波的空间频率（波长λc）。 这种频率匹配使得能够并行地寻址毛细波的选定波峰，例如用于线打印。 优选地，用于打印机的毛细管波是空间稳定的驻波，使得毛细波的波峰和波谷被锁定在预定的空间位置。

公开(公告)号：EP0234718A2

公开(公告)日：1987-09-02

申请号：EP87300507.8

申请日：1987-01-21

申请人： XEROX CORPORATION

发明人： Elrod, Scott Alan

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2002/14322

摘要： A nozzleless droplet ejector for ejecting droplets from a free surface (16) of a pool of liquid (17), such as a pool of ink, comprises a selectively-energizeable droplet-emission controller (21) for generating a freely-propagating capillary wave on the surface of the pool to provide on/off timing control and/or ejection trajectory angle control for the ejector. The controller comprises a conductor (22) and a counter-electrode (23). The conductor is immersed in the pool, whereby a capillary surface wave is generated when a periodic voltage is applied across the conductor and the counter-electrode. In one embodiment, a ultrasonic pressure wave is focused on the free surface of the pool, and the capillary wave supplied by the controller coherently interacts with that pressure wave to provide the desired control.
Separate controllers may be provided for independently controlling the ejectors of multiple ejector arrays.

摘要翻译： 液滴喷射器具有自由表面的液体池和在池中产生压力波的源。 用于喷射器的毛细管波发射控制器包括导体和对电极。 导体靠近液体表面，靠近压力波的焦点。 源极耦合在导体和对电极之间以在其上施加周期性电压。 这导致自由传播的毛细管表面从导体辐射。

公开(公告)号：EP0192428A1

公开(公告)日：1986-08-27

申请号：EP86301013.8

申请日：1986-02-14

申请人： XEROX CORPORATION

发明人： Domoto, Gerald Asao ,  Sereny, Aron

IPC分类号： B41J3/04 ,  G01D15/18

CPC分类号： B41J2/1404 ,  B41J2002/14322 ,  B41J2002/14387

摘要： (D A thermal ink jet printhead ejects ink droplets on demand by utilizing the conservation of momentum of collapsing bubbles in a layer (30) of liquid ink having a predetermined thickness. The printhead has an ink containing chamber (31) with an array of individually addressable heating elements (24) on one chamber interior surface which are aligned with an elongated opening (19) in a parallel, confronting chamber wall. The spacing between the chamber wall with the elongated opening and the chamber surface with the heating elements provide the desired ink layer thickness. Selectively addressed heating elements (24) momentarily produce vapor bubbles in the ink layer (30). When the bubbles collapse radially inward towards their respective heating elements, an oppositely directed force perpendicular to the heating element is generated which is large enough to overcome the surface tension of the ink meniscus (32) in the elongated opening (19) and propel a droplet (18) of ink therefrom towards a recording medium.