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    • 42. 发明申请
    • CONTINUOUS LIQUID EJECTION USING COMPLIANT MEMBRANE TRANSDUCER
    • 使用合适的膜传感器进行连续液体喷射
    • US20120268529A1
    • 2012-10-25
    • US13089594
    • 2011-04-19
    • Michael F. BaumerJames D. HuffmanHrishikesh V. PanchawaghJeremy M. GraceYonglin XieQing YangDavid P. TrauernichtJohn A. Lebens
    • Michael F. BaumerJames D. HuffmanHrishikesh V. PanchawaghJeremy M. GraceYonglin XieQing YangDavid P. TrauernichtJohn A. Lebens
    • B41J2/04
    • B41J2/03B41J2002/14346
    • A method of continuously ejecting liquid includes providing a liquid ejection system that includes a substrate and an orifice plate affixed to the substrate. Portions of the substrate define a liquid chamber. The orifice plate includes a MEMS transducing member. A first portion of the MEMS transducing member is anchored to the substrate. A second portion of the MEMS transducing member extends over at least a portion of the liquid chamber. The second portion of the MEMS transducing member is free to move relative to the liquid chamber. A compliant membrane is positioned in contact with the MEMS transducing member. A first portion of the compliant membrane covers the MEMS transducing member and a second portion of the compliant membrane is anchored to the substrate. The compliant membrane includes an orifice. Liquid is provided under a pressure sufficient to eject a continuous jet of the liquid through the orifice located in the compliant membrane of the orifice plate by a liquid supply. A drop of liquid is caused to break off from the liquid jet by selectively actuating the MEMS transducing member which causes a portion of the compliant membrane to be displaced relative to the liquid chamber.
    • 一种连续喷射液体的方法包括提供一种液体喷射系统,其包括基板和固定在基板上的孔板。 衬底的一部分限定了液体室。 孔板包括MEMS换能构件。 MEMS转换构件的第一部分被锚定到基底。 MEMS转换构件的第二部分在液体室的至少一部分上延伸。 MEMS转换构件的第二部分相对于液体腔自由移动。 柔性膜定位成与MEMS换能件接触。 柔性膜的第一部分覆盖MEMS换能构件,并且柔性膜的第二部分锚定到基底。 柔性膜包括孔口。 在足够的压力下提供液体,该压力通过位于孔板的柔顺膜中的孔通过液体供应喷射液体的连续射流。 通过选择性地致动MEMS转换构件使一滴液体从液体射流中脱离,这导致顺应性膜的一部分相对于液体腔移位。
    • 46. 发明授权
    • Thermal actuator with reduced temperature extreme and method of operating same
    • 具有降低温度极限的热致动器和操作方法相同
    • US06886920B2
    • 2005-05-03
    • US10693162
    • 2003-10-24
    • David P. TrauernichtEdward P. FurlaniJohn A. Lebens
    • David P. TrauernichtEdward P. FurlaniJohn A. Lebens
    • B41J2/045B41J2/055B41J2/14B41J2/16B41J2/05
    • B41J2/14427B41J2/1623B41J2/1628B41J2/1639B41J2/1646B41J2/1648
    • An apparatus for a thermal actuator for a micromechanical device, especially a liquid drop emitter such as an ink jet printhead, is disclosed. The disclosed thermal actuator comprises a base element and a cantilevered element extending from the base element and normally residing at a first position before activation. The cantilevered element includes a first layer constructed of an electrically resistive material, such as titanium aluminide, patterned to have a first resistor segment and a second resistor segment each extending from the base element; a coupling device that conducts electrical current serially between the first and second resistor segments; and a second layer constructed of a dielectric material having a low coefficient of thermal expansion and attached to the first layer. A first electrode connected to the first resistor segment and a second electrode connected to the second resistor segment are provided to apply an electrical voltage pulse between the first and second electrodes thereby causing an activation power density in the first and second resistor segments and a power density maximum within the coupling device resulting in a deflection of the cantilevered element to a second position and wherein the power density maximum is less than four times the activation power density. The coupling device may be formed as a segment in the first layer or in a third layer of an electrically active material. Methods of operating a liquid drop emitter having a thermal actuator are disclosed which avoid the generation of vapor bubbles.
    • 公开了一种用于微机械装置的热致动器的装置,特别是诸如喷墨打印头的液滴发射器。 所公开的热致动器包括基座元件和从基座元件延伸的通常位于激活之前的第一位置处的悬臂元件。 悬臂元件包括由诸如钛铝化物的电阻材料构成的第一层,其被图案化以具有每个从基底元件延伸的第一电阻器段和第二电阻器段; 耦合装置,其在第一和第二电阻器段之间串联地传导电流; 以及由具有低热膨胀系数并附着到第一层的电介质材料构成的第二层。 提供连接到第一电阻器段的第一电极和连接到第二电阻器段的第二电极以在第一和第二电极之间施加电压脉冲,从而引起第一和第二电阻器段中的激活功率密度和功率密度 耦合装置内的最大值导致悬臂元件偏转到第二位置,并且其中功率密度最大值小于激活功率密度的四倍。 耦合装置可以形成为第一层中的一段或电活性材料的第三层。 公开了具有热致动器的液滴发射器的操作方法,其避免产生蒸气泡。
    • 47. 发明授权
    • Thermal actuator with reduced temperature extreme and method of operating same
    • US06685303B1
    • 2004-02-03
    • US10218788
    • 2002-08-14
    • David P. TrauernichtEdward P. FurlaniJohn A. Lebens
    • David P. TrauernichtEdward P. FurlaniJohn A. Lebens
    • H01H7118
    • B41J2/14427B41J2/1623B41J2/1628B41J2/1639B41J2/1646B41J2/1648
    • An apparatus for a thermal actuator for a micromechanical device, especially a liquid drop emitter such as an ink jet printhead, is disclosed. The disclosed thermal actuator comprises a base element and a cantilevered element extending from the base element and normally residing at a first position before activation. The cantilevered element includes a first layer constructed of an electrically resistive material, such as titanium aluminide, patterned to have a first resistor segment and a second resistor segment each extending from the base element; a coupling device that conducts electrical current serially between the first and second resistor segments; and a second layer constructed of a dielectric material having a low coefficient of thermal expansion and attached to the first layer. A first electrode connected to the first resistor segment and a second electrode connected to the second resistor segment are provided to apply an electrical voltage pulse between the first and second electrodes thereby causing an activation power density in the first and second resistor segments and a power density maximum within the coupling device resulting in a deflection of the cantilevered element to a second position and wherein the power density maximum is less than four times the activation power density. The coupling device may be formed as a segment in the first layer or in a third layer of an electrically active material. Methods of operating a liquid drop emitter having a thermal actuator are disclosed which avoid the generation of vapor bubbles.
    • 48. 发明授权
    • Thermal actuator drop-on-demand apparatus and method for high frequency
    • 热致动器按需设备和高频方法
    • US06460972B1
    • 2002-10-08
    • US09993150
    • 2001-11-06
    • David P. TrauernichtJohn A. Lebens
    • David P. TrauernichtJohn A. Lebens
    • B41J204
    • B41J2/04585B41J2/04588
    • A liquid drop emitter, such as an ink jet device, for emitting a series of liquid drops at high frequency is disclosed. The drop emitter comprises a liquid-filled chamber having a nozzle, a thermo-mechanical actuator for applying pressure to liquid at the nozzle, means for heating the thermo-mechanical actuator in response to electrical pulses, and a controller for determining the parameters of the electrical pulses. The method of operating comprises determining a nominal electrical pulse having a nominal energy E0, a nominal pulse duration TP0, which causes the emission of at least one drop at a sustained period of repetition TC. The method of operating further determines a steady state electrical pulse having energy E0, a steady state pulse duration TPss, which, when applied to the electroresistive means does not cause the emission or weeping of the liquid from the nozzle. The method applies to the means for heating, during every period of time TC, a nominal electrical pulse to emit at least one drop, or a steady state electrical pulse, so that an average power PAVE, where PAVE=E0/TC, is applied to the liquid drop emitter in order to maintain a steady state thermal condition.
    • 公开了一种用于以高频发射一系列液滴的液滴发射器,例如喷墨装置。 液滴发射器包括具有喷嘴的液体填充室,用于在喷嘴处对液体施加压力的热机械致动器,用于响应于电脉冲加热热机械致动器的装置,以及用于确定 电脉冲。 操作的方法包括确定具有标称能量E0的标称电脉冲,标称脉冲持续时间TP0,其导致在持续的重复周期TC发射至少一滴。 操作方法进一步确定具有能量E0,稳定状态脉冲持续时间TPss的稳态电脉冲,其在施加到电阻装置时不引起来自喷嘴的液体的发射或哭泣。 该方法适用于加热装置,在每个时间段TC期间,发出至少一滴的标称电脉冲或稳态电脉冲,使得施加PAVE = E0 / TC的平均功率PAVE 到液滴发射器,以保持稳态热条件。
    • 49. 发明申请
    • FLUID EJECTION USING MEMS COMPOSITE TRANSDUCER
    • 使用MEMS复合传感器的流体喷射
    • US20120268513A1
    • 2012-10-25
    • US13089542
    • 2011-04-19
    • James D. HuffmanChristopher N. DelametterDavid P. Trauernicht
    • James D. HuffmanChristopher N. DelametterDavid P. Trauernicht
    • B41J29/38B41J2/045
    • B41J2/14427B41J2/14201B41J2/14282B41J2/14314
    • A method of ejecting a drop of fluid includes providing a fluid ejector. The fluid ejector includes a substrate, a MEMS transducing member, a compliant membrane, walls, and a nozzle. The substrate includes a cavity and a fluidic feed. A first portion of the MEMS transducing member is anchored to the substrate. A second portion of the MEMS transducing member extends over at least a portion of the cavity and is free to move relative to the cavity. The compliant membrane is positioned in contact with the MEMS transducing member. A first portion of the compliant membrane covers the MEMS transducing member, A second portion of the compliant membrane being anchored to the substrate. Walls define a chamber that is fluidically connected to the fluidic feed. At least the second portion of the MEMS transducing member is enclosed within the chamber. A quantity of fluid is supplied to the chamber through the fluidic feed. An electrical pulse is applied to the MEMS transducing member to eject a drop of fluid through the nozzle.
    • 喷射液滴的方法包括提供流体喷射器。 流体喷射器包括基板,MEMS转换构件,柔性膜,壁和喷嘴。 衬底包括空腔和流体进料。 MEMS转换构件的第一部分被锚定到基底。 MEMS转换构件的第二部分在空腔的至少一部分上延伸并且相对于空腔自由移动。 柔性膜定位成与MEMS换能件接触。 柔性膜的第一部分覆盖MEMS转导构件。柔性膜的第二部分被锚固到基底上。 壁限定了流体连接到流体进料的室。 至少MEMS转换构件的第二部分被封闭在腔室内。 通过流体进料将一定量的流体供应到腔室。 电脉冲被施加到MEMS转换构件以通过喷嘴喷射一滴液体。