公开(公告)号：EP0550192A3

公开(公告)日：1993-11-10

申请号：EP92311381.5

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Hadimioglu, Babur B. ,  Khuri-Yakub, Butrus T. ,  Rawson, Eric G.

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2002/14322

摘要： A printhead for an acoustic ink printer has a piezoelectric transducer (11,12,13) on one surface of a substrate (10). A layer (14) of a dielectric material is provided on the surface of the transducer away from the substrate. A Fresnel lens (15) is formed in the surface of the dielectric layer away from the transducer, for focusing sound energy near the surface of a body of ink adjacent the dielectric layer. A pit (19) may be formed in the substrate under the transducer. The transducer may be a body (12) of piezoelectric material sandwiched between a pair of electrodes (11,13), the lower electrode of which has a thickness that is a quarter wave at the excitation frequency of the transducer. An anti-reflective coating (30) may be provided on the lower surface of the substrate, with a body (31) of an absorptive material abutting the anti-reflective layer, or an absorptive material (32) having an acoustic impedance approximately matching that of the substrate may be coated on the lower surface of the substrate.

公开(公告)号：EP0550193A1

公开(公告)日：1993-07-07

申请号：EP92311382.3

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Hadimioglu, Babur B. ,  Rawson, Eric G. ,  Khuri-Yakub, Butrus T.

IPC分类号： B06B1/06

CPC分类号： B06B1/067 ,  B41J2/14008

摘要： An acoustic ink printer transducer comprises a piezoelectric layer (13) positioned between two suitable electrode materials (12,14). To enable ejection of a number of different ink droplet sizes from the acoustic ink printer, thereby facilitating grey scale printing, the piezoelectric layer (13) and one (14) of the electrode layers have an acoustic thickness of λ/4, where λ is the wavelength at the fundamental resonant frequency ω o of the transducer.

摘要翻译： 一种声控喷墨打印机换能器包括两个合适的电极材料（12,14）之间定位的压电体层（13）。 为了使一些从声学喷墨打印机，不同的墨滴大小的喷出从而便于灰度打印，压电体层（13）和所述电极层中的一个（14）具有与拉姆达/ 4，其中的λ是声厚度 波长在换能器的基本共振频率ω-O操作。

公开(公告)号：EP0243117B1

公开(公告)日：1992-11-25

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

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：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：EP0550192B1

公开(公告)日：1997-05-21

申请号：EP92311381.5

申请日：1992-12-14

申请人： XEROX CORPORATION

发明人： Hadimioglu, Babur B. ,  Khuri-Yakub, Butrus T. ,  Rawson, Eric G.

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2002/14322

公开(公告)号：EP0572241A2

公开(公告)日：1993-12-01

申请号：EP93304093.3

申请日：1993-05-26

申请人： XEROX CORPORATION

发明人： Akamine, Shinya ,  Khuri-Yakub, Butrus T. ,  Quate, Calvin F. ,  Hadimioglu, Babur B.

IPC分类号： B41J2/04

CPC分类号： B41J2/14008 ,  B41J2002/14483

摘要： A droplet ejector (10) for an acoustic printer has an acoustically thin capping structure (12) that permits accurate location of the free surface of a liquid ink (30) to enable acoustically induced ink droplet ejection, and that prevents the ink from spilling from its well. Acoustically thin implies that the capping structure thickness is a small fraction of the wavelength of the applied acoustic energy. One capping structure is a thin wafer of porous silicon placed over the aperture of an ink filled ink well (28). Acoustic radiation pressure pushes liquid ink from the well through the pores (36) so that a thin ink film forms over the capping structure. Another capping structure is a solid membrane placed over the ink well aperture. An ink deposition means (60,90) deposits a thin film of ink over the capping structure. With either structure, applied acoustic energy from a transducer (20) can pass through the capping structure to cause droplet ejection from the free surface of the ink film.

摘要翻译： 用于声学打印机的液滴喷射器（10）具有声学薄的封盖结构（12），其允许液体墨水（30）的自由表面的精确定位以使得能够引起声学感应的墨滴喷射，并且防止墨水溢出 很好。 声学上意味着封盖结构厚度是施加的声能的波长的一小部分。 一个封盖结构是放置在墨水填充的墨水孔（28）的孔的上方的多孔硅薄片。 声辐射压力从孔中推动液体墨通过孔（36），使得在封盖结构上形成薄的墨膜。 另一种封盖结构是置于油井孔上的固体膜。 油墨沉积装置（60,90）在覆盖结构上沉积墨水薄膜。 使用任一结构，来自换能器（20）的施加的声能可以通过封盖结构，以使墨滴从墨膜的自由表面喷射。

公开(公告)号：EP0272092B1

公开(公告)日：1993-09-15

申请号：EP87311046.4

申请日：1987-12-15

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 ,  B41J2002/14322