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1. 发明申请

US20070064037A1 Ink jet break-off length measurement apparatus and method 有权
标题翻译：喷墨断裂长度测量装置和方法
公开(公告)号：US20070064037A1
公开(公告)日：2007-03-22
申请号：US11229454
申请日：2005-09-16
申请人： Gilbert Hawkins , Michael Piatt , John Brazas , Stephen Pond
发明人： Gilbert Hawkins , Michael Piatt , John Brazas , Stephen Pond
IPC分类号： B41J29/393
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/13 , B41J2202/16
摘要： A jet break-off length measurement apparatus for a continuous liquid drop emission system is provided. The jet break-off length measurement apparatus comprises a liquid drop emitter containing a positively pressurized liquid in flow communication with at least one nozzle for emitting a continuous stream of liquid. Heater resistor apparatus is adapted to transfer pulses of thermal energy to the liquid in flow communication with the at least one nozzle sufficient to cause the break-off of the at least one continuous stream of liquid into a stream of drops of predetermined volumes. A sensing apparatus adapted to detect the stream of drops of predetermined volumes is provided. A control apparatus is adapted to determine a characteristic of the stream of drops of predetermined volumes that is related to the break-off length. Further apparatus is adapted to inductively charge at least one drop and to cause electric field deflection of charged drops. Jet stimulation apparatus comprising a plurality of transducers corresponding to the plurality of nozzles and adapted to transfer pulses of energy to the liquid sufficient to cause the break-off of the plurality of continuous streams of liquid into a plurality of streams of drops of predetermined volumes is also disclosed. Methods of measuring the jet break-off length using phase sensitive amplification circuitry are disclosed.
摘要翻译：提供一种用于连续液滴发射系统的射流断裂长度测量装置。射流断裂长度测量装置包括液滴发射器，其包含与至少一个喷嘴流动连通的正压液体，用于发射连续的液体流。加热器电阻器装置适于将热能的脉冲传送到与至少一个喷嘴流动连通的液体，足以使至少一个连续的液体流分解成预定体积的液滴流。提供了适于检测预定体积的液滴流的感测装置。控制装置适于确定与断裂长度相关的预定体积的液滴流的特性。进一步的装置适于对至少一滴进行电感充电并引起带电液滴的电场偏转。喷射刺激装置包括对应于多个喷嘴的多个换能器并且适于将足够的能量脉冲转移到液体，以使多个连续的液体流分解成多个预定体积的液滴流，也披露。公开了使用相位敏感放大电路测量射流断裂长度的方法。

2. 发明申请

US20070222826A1 INK JET BREAK-OFF LENGTH CONTROLLED DYNAMICALLY BY INDIVIDUAL JET STIMULATION 有权
标题翻译：墨水喷射喷射长时间由个体喷射动力学控制
公开(公告)号：US20070222826A1
公开(公告)日：2007-09-27
申请号：US11758786
申请日：2007-06-06
申请人： Gilbert Hawkins , Stephen Pond , Michael Piatt
发明人： Gilbert Hawkins , Stephen Pond , Michael Piatt
IPC分类号： B41J2/02
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/13 , B41J2202/16
摘要： A jet break-off length control apparatus for a continuous liquid drop emission system is provided. The jet break-off length control apparatus comprises a liquid drop emitter containing a positively pressurized liquid in flow communication with at least one nozzle for emitting a continuous stream of liquid. Resistive heater apparatus is adapted to transfer pulses of thermal energy to the liquid in flow communication with the at least one nozzle sufficient to cause the break-off of the at least one continuous stream of liquid into a stream of drops of predetermined volumes. A sensing apparatus adapted to detect the stream of drops of predetermined volumes is provided. The jet break-off length control apparatus further comprises a control apparatus adapted to calculate a characteristic of the stream of drops of predetermined volumes and adapted to provide a break-off length calibration signal to the resistive heater apparatus wherein the break-off length calibration signal is determined at least by the characteristic of the stream of drops of predetermined volumes. Further apparatus is adapted to inductively charge at least one drop and to cause electric field deflection of charged drops. The present inventions are additionally configured to control break-off lengths for a plurality of streams of drops of predetermined volumes by determining a break-off length calibration signal that contains information specific to the plurality of streams of drops of predetermined volumes. Jet stimulation apparatus comprised of a plurality of thermomechanical or electromechanical transducer devices that transfer mechanical energy to the fluid are claimed. Methods of controlling the jet break-off length are also disclosed.
摘要翻译：提供一种用于连续液滴发射系统的喷射断裂长度控制装置。喷射断裂长度控制装置包括液滴发射器，其包含与至少一个喷嘴流动连通的正压液体，用于发射连续的液体流。电阻式加热器装置适于将热能的脉冲传送到与至少一个喷嘴流动连通的液体，足以使至少一个连续的液体流分解成预定体积的液滴流。提供了适于检测预定体积的液滴流的感测装置。喷射断裂长度控制装置还包括适于计算预定体积的液滴流的特性的控制装置，并适于向电阻加热器装置提供断开长度校准信号，其中断开长度校准信号至少由预定体积的液滴流的特性确定。进一步的装置适于对至少一滴进行电感充电并引起带电液滴的电场偏转。本发明还被配置为通过确定包含特定于多个预定体积的液滴流的信息的断裂长度校准信号来控制多个预定体积的液滴流的断裂长度。要求具有将机械能传递到流体的多个热机械或机电换能器装置构成的射流刺激装置。还公开了控制喷射断裂长度的方法。

3. 发明申请

US20070064034A1 Ink jet break-off length controlled dynamically by individual jet stimulation 有权
标题翻译：通过单独喷射刺激动态控制喷墨断裂长度
公开(公告)号：US20070064034A1
公开(公告)日：2007-03-22
申请号：US11229467
申请日：2005-09-16
申请人： Gilbert Hawkins , Stephen Pond , Michael Piatt
发明人： Gilbert Hawkins , Stephen Pond , Michael Piatt
IPC分类号： B41J29/38
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/13 , B41J2202/16
摘要： A jet break-off length control apparatus for a continuous liquid drop emission system is provided. The jet break-off length control apparatus comprises a liquid drop emitter containing a positively pressurized liquid in flow communication with at least one nozzle for emitting a continuous stream of liquid. Resistive heater apparatus is adapted to transfer pulses of thermal energy to the liquid in flow communication with the at least one nozzle sufficient to cause the break-off of the at least one continuous stream of liquid into a stream of drops of predetermined volumes. A sensing apparatus adapted to detect the stream of drops of predetermined volumes is provided. The jet break-off length control apparatus further comprises a control apparatus adapted to calculate a characteristic of the stream of drops of predetermined volumes and adapted to provide a break-off length calibration signal to the resistive heater apparatus wherein the break-off length calibration signal is determined at least by the characteristic of the stream of drops of predetermined volumes. Further apparatus is adapted to inductively charge at least one drop and to cause electric field deflection of charged drops. The present inventions are additionally configured to control break-off lengths for a plurality of streams of drops of predetermined volumes by determining a break-off length calibration signal that contains information specific to the plurality of streams of drops of predetermined volumes. Jet stimulation apparatus comprised of a plurality of thermomechanical or electromechanical transducer devices that transfer mechanical energy to the fluid are claimed. Methods of controlling the jet break-off length are also disclosed.
摘要翻译：提供一种用于连续液滴发射系统的喷射断裂长度控制装置。喷射断裂长度控制装置包括液滴发射器，其包含与至少一个喷嘴流动连通的正压液体，用于发射连续的液体流。电阻式加热器装置适于将热能的脉冲传送到与至少一个喷嘴流动连通的液体，足以使至少一个连续的液体流分解成预定体积的液滴流。提供了适于检测预定体积的液滴流的感测装置。喷射断裂长度控制装置还包括适于计算预定体积的液滴流的特性的控制装置，并适于向电阻加热器装置提供断开长度校准信号，其中断开长度校准信号至少由预定体积的液滴流的特性确定。进一步的装置适于对至少一滴进行电感充电并引起带电液滴的电场偏转。本发明还被配置为通过确定包含特定于多个预定体积的液滴流的信息的断裂长度校准信号来控制多个预定体积的液滴流的断裂长度。要求具有将机械能传递到流体的多个热机械或机电换能器装置构成的射流刺激装置。还公开了控制喷射断裂长度的方法。

4. 发明申请

US20070064068A1 Continuous ink jet apparatus with integrated drop action devices and control circuitry 有权
标题翻译：连续喷墨装置具有集成的落料装置和控制电路
公开(公告)号：US20070064068A1
公开(公告)日：2007-03-22
申请号：US11229263
申请日：2005-09-16
申请人： Michael Piatt , Stephen Pond
发明人： Michael Piatt , Stephen Pond
IPC分类号： B41J2/02 , B41J2/125
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/12 , B41J2202/13 , B41J2202/16
摘要： A continuous liquid drop emission apparatus is provided. The liquid drop emission apparatus is comprised of a liquid chamber containing a positively pressurized liquid in flow communication with at least one nozzle for emitting a continuous stream of liquid and a jet stimulation apparatus adapted to transfer pulses of energy to the liquid in flow communication with the at least one nozzle sufficient to cause the break-off of the at least one continuous stream of liquid into a stream of drops of predetermined volumes. The continuous liquid drop emission apparatus further comprises a semiconductor substrate including integrated circuitry formed therein for performing and controlling a plurality of actions on the drops of predetermined volumes. The plurality of actions may include drop charging, drop sensing, drop deflection and drop capturing. Drop action apparatus adapted to perform these functions and integrated circuitry to control the drop action apparatus are formed in the semiconductor substrate. Jet stimulation apparatus comprised of a plurality of transducers including resistive heaters, electromechanical vibrators or thermomechanical vibrators, together with integrated control circuitry, may also be integrated on the semiconductor substrate. Silicon is a preferred material for the semiconductor substrate and CMOS and NMOS designs and fabrication processes are preferred for the integrated circuitry.
摘要翻译：提供连续液滴发射装置。液滴发射装置包括液体室，该液体室含有与至少一个用于发射连续液体流的喷嘴流动连通的正压液体，以及喷射刺激装置，其适于将能量脉冲转移到与液体流动连通的液体至少一个喷嘴，其足以使所述至少一个连续的液体流分解成预定体积的液滴流。连续液滴发射装置还包括半导体衬底，其包括形成在其中的集成电路，用于执行和控制对预定体积的液滴的多个动作。多个动作可以包括液滴充电，液滴感测，液滴偏转和液滴捕获。在半导体衬底中形成适于执行这些功能的放置动作装置和集成电路来控制液滴动作装置。包括电阻加热器，机电振动器或热机械振动器的多个换能器以及集成控制电路的射流刺激装置也可以集成在半导体衬底上。硅是半导体衬底的优选材料，并且CMOS和NMOS设计和制造工艺对于集成电路是优选的。

5. 发明申请

US20060262168A1 High speed, high quality liquid pattern deposition apparatus 有权
标题翻译：高速，高品质的液体图案沉积装置
公开(公告)号：US20060262168A1
公开(公告)日：2006-11-23
申请号：US11130621
申请日：2005-05-17
申请人： Gilbert Hawkins , Stephen Pond
发明人： Gilbert Hawkins , Stephen Pond
IPC分类号： B41J2/07
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/13 , B41J2202/16
摘要： A drop deposition apparatus for laying down a patterned liquid layer on a receiver substrate, for example, a continuous ink jet printer, is disclosed. The liquid deposition apparatus comprises a drop emitter containing a positively pressurized liquid in flow communication with a linear array of nozzles for emitting a plurality of continuous streams of liquid having nominal stream velocity vj0, wherein the plurality of nozzles have effective nozzle diameters D0 and extend in an array direction with an effective nozzle spacing Ly. Resistive heater apparatus is adapted to transfer thermal energy pulses of period τ0 to the liquid in flow communication with the plurality of nozzles sufficient to cause the break-off of the plurality of continuous streams of liquid into a plurality of streams of drops of predetermined nominal drop volume V0. Relative motion apparatus is adapted to move the drop emitter and receiver substrate relative to each other in a process direction at a process velocity S so that individual drops are addressable to the receiver substrate with a process direction addressability, Ap=τ0S. The effective nozzle spacing is less than 85 microns, the process speed S is at least 1 meter/sec and the addressability, Ap, of individual drops at the receiver substrate in the process direction is less than 6 microns. Drop deposition apparatus is disclosed wherein the predetermined volumes of drops include drops of a unit volume, V0, and drops having volumes that are integer multiples of the unit volume, mV0. Further apparatus is adapted to inductively charge at least one drop and to cause electric field deflection of charged drops.
摘要翻译：公开了一种用于将图形化液体层放置在接收器基板上的液滴沉积设备，例如连续喷墨打印机。液体沉积设备包括液滴发射器，其包含与用于发射多个具有标称流速度的液体流的多个喷嘴的线性阵列流动连通的正压液体，其中多个喷嘴具有有效的喷嘴直径D 0，并且沿着排列方向延伸，并且具有有效的喷嘴间距L y y。电阻加热器装置适于将周期τ0的热能脉冲传送到与多个喷嘴流动连通的液体，足以使多个连续的液流分解成多个的预定标称液滴体积V 0的下降流。相对运动装置适于在处理速度S下在处理方向上相对于彼此移动液滴发射器和接收器衬底，使得各个液滴可以以处理方向可寻址性对接收器衬底寻址。A SUB > = tau S。有效的喷嘴间距小于85微米，处理速度S至少为1米/秒，处理方向上接收器基板处的各个液滴的寻址能力小于6 微米。公开了一种液滴沉积设备，其中预定体积的液滴包括单位体积V O O的液滴，以及具有单位体积的整数倍的体积的液滴，mV < 。进一步的装置适于对至少一滴进行电感充电并引起带电液滴的电场偏转。

6. 发明申请

US20060023011A1 Suppression of artifacts in inkjet printing 有权
标题翻译：在喷墨打印中抑制文物
公开(公告)号：US20060023011A1
公开(公告)日：2006-02-02
申请号：US10903051
申请日：2004-07-30
申请人： Gilbert Hawkins , James Chwalek , Stephen Pond
发明人： Gilbert Hawkins , James Chwalek , Stephen Pond
IPC分类号： B41J29/38
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/031 , B41J2002/033
摘要： A method of printing is provided. The method includes providing a travel path comprising a direction of motion of a printhead relative to a recording medium, the printhead having a linear array of nozzles positioned at a nonzero angle relative to the travel path; associating a pixel area of the recording medium with each nozzle of the linear array and a time interval during which a drop ejected from each nozzle can impinge the pixel area of the recording medium; dividing the time interval into a plurality of subintervals; grouping some of the plurality of subintervals into blocks; associating one of two labels with each block, the first label defining a printing drop, the second label defining non-printing drops; associating a drop forming pulse between consecutive selected subintervals of each block having the first label; associating a drop forming pulse between each subinterval of each block having the second label; associating a drop forming pulse between other subintervals, the drop forming pulse being between each pair of consecutive blocks; and causing drops to be ejected from each nozzle based on the associated drop forming pulses.
摘要翻译：提供了一种打印方法。该方法包括提供包括打印头相对于记录介质的运动方向的行进路径，该打印头具有相对于行进路径定位成非零角度的线性排列阵列; 将记录介质的像素区域与线性阵列的每个喷嘴和从每个喷嘴喷射的液滴冲击记录介质的像素区域的时间间隔相关联; 将时间间隔划分成多个子区间; 将多个子间隔中的一些分成块; 将两个标签中的一个与每个块相关联，第一个标签定义打印滴，第二个标签定义非打印滴; 在具有第一标签的每个块的连续选择的子区间之间关联下降形成脉冲; 在具有第二标签的每个块的每个子间隔之间关联液滴形成脉冲; 在其他子间隔之间关联液滴形成脉冲，所述液滴形成脉冲在每对连续块之间; 并且基于相关联的液滴形成脉冲使液滴从每个喷嘴喷出。

7. 发明申请

US20070064066A1 Continuous ink jet apparatus and method using a plurality of break-off times 有权
标题翻译：连续喷墨装置和使用多个断开时间的方法
公开(公告)号：US20070064066A1
公开(公告)日：2007-03-22
申请号：US11229261
申请日：2005-09-16
申请人： Michael Piatt , Stephen Pond , James Katerberg , Randy Vandagriff
发明人： Michael Piatt , Stephen Pond , James Katerberg , Randy Vandagriff
IPC分类号： B41J2/07
CPC分类号： B41J2/03 , B41J2002/022 , B41J2002/033 , B41J2202/12 , B41J2202/16
摘要： A continuous liquid drop emission apparatus is disclosed comprising a liquid drop emitter containing a positively pressurized liquid in flow communication with a plurality of nozzles formed in a common nozzle member for emitting a plurality of continuous streams of liquid. A jet stimulation apparatus is provided comprising a plurality of transducers corresponding to the plurality of nozzles and adapted to transfer energy to the liquid in corresponding flow communication with the plurality of nozzles sufficient to cause the break-off of the plurality of continuous streams of liquid at a plurality of predetermined break-off times into a plurality of streams of drops of predetermined volumes. Sensing apparatus is provided adapted to measure a characteristic value for each of the plurality of streams of drops of predetermined volumes; and control apparatus is adapted to provide a plurality of break-off time setting signals to the jet stimulation apparatus to cause the plurality of predetermined break-off times determined, at least, by the characteristic value of each of the plurality of streams of drops of predetermined volumes. Alternately, a sensing apparatus is used in an off-line calibration set-up and characteristic values are measured for the plurality of streams and stored in a stream memory that is included in the continuous liquid drop apparatus. The present inventions are also configured to provide a plurality of the break-off times for a plurality of liquid streams in a continuous liquid drop emission apparatus that is further adapted to inductively charge at least one drop in a each of a plurality of streams and having electric field deflection apparatus adapted to generate a Coulomb force on an inductively charged drop. Methods of operating a continuous liquid drop emission apparatus utilizing a plurality of predetermined break-off times are disclosed.
摘要翻译：公开了一种连续的液滴发射装置，其包括液滴发射器，其包含与形成在公共喷嘴构件中的多个喷嘴流动连通的正压液体，用于发射多个连续的液体流。提供了一种喷射刺激装置，其包括对应于多个喷嘴的多个换能器，并且适于将能量转移到与多个喷嘴相应的流动连通的液体，足以引起多个连续的液体流的断裂将多个预定的断开时间转换成多个预定体积的液滴流。提供感测装置，其适于测量多个预定体积的液滴流中的每一个的特征值; 并且控制装置适于向喷气刺激装置提供多个断开时间设置信号，以使得至少由多个液滴流中的每一个的特征值确定多个预定的断开时间预定量。或者，在离线校准设置中使用感测装置，并且对多个流测量特征值并存储在包括在连续液滴装置中的流存储器中。本发明还被配置为在连续液滴发射装置中为多个液体流提供多个断开时间，其进一步适于对多个流中的每一个流中的至少一个液滴进行感应充电并具有适于在感应充电的液滴上产生库仑力的电场偏转装置。公开了利用多个预定断开时间来操作连续液滴发射装置的方法。

8. 发明申请

US20070296539A1 DOUBLY-ANCHORED THERMAL ACTUATOR HAVING VARYING FLEXURAL RIGIDITY 有权
标题翻译：具有变化的弯曲刚度的双重安装的致动器
公开(公告)号：US20070296539A1
公开(公告)日：2007-12-27
申请号：US11849378
申请日：2007-09-04
申请人： Antonio Cabal , Stephen Pond
发明人： Antonio Cabal , Stephen Pond
IPC分类号： H01H71/16 , B41J2/05
CPC分类号： H01H61/02 , H01H37/00 , H01H2061/006
摘要： A doubly-anchored thermal actuator for a micro-electromechanical device such as a liquid drop emitter or a fluid control microvalve is disclosed. The thermal actuator is comprised of a base element formed with a depression having opposing anchor. A deformable element, attached to the base element at the opposing anchor edges, is constructed as a planar lamination including a first layer of a first material having a low coefficient of thermal expansion and a second layer of a second material having a high coefficient of thermal expansion. The deformable element has anchor portions adjacent the anchor edges and a central portion between the anchor portions wherein the flexural rigidity of the anchor portions is substantially less than the flexural rigidity of the central portion. The doubly-anchored thermal actuator further comprises apparatus adapted to apply a heat pulse to the deformable element that causes a sudden rise in the temperature of the deformable element. The deformable element bows outward in a direction toward the second layer, and then relaxes to a residual shape as the temperature decreases. The doubly-anchored thermal actuator is configured with a liquid chamber having a nozzle or a fluid flow port to form a liquid drop emitter or a fluid control microvalve, or to activate an electrical microswitch. Heat pulses are applied to the deformable element by resistive heating or by light energy pulses.
摘要翻译：公开了一种用于诸如液滴发射器或流体控制微型阀的微机电装置的双重锚定的热致动器。热致动器包括形成有具有相对的锚的凹陷的基座元件。在相对的锚边缘处附接到基体元件的可变形元件被构造为平面层压，其包括具有低热膨胀系数的第一材料的第一层和具有高热系数的第二材料的第二层扩张。可变形元件具有邻近锚定边缘的锚固部分和锚固部分之间的中心部分，其中锚固部分的抗弯刚度基本上小于中心部分的弯曲刚度。双重锚固的热致动器还包括适于将热脉冲施加到可变形元件上的装置，其引起可变形元件的温度的突然上升。可变形元件在朝向第二层的方向上向外弯曲，然后随着温度降低而松弛至残留形状。双重锚固的热致动器配置有具有喷嘴或流体流动端口的液体室，以形成液滴发射器或流体控制微型阀，或者激活电微型开关。加热脉冲通过电阻加热或光能脉冲施加到可变形元件。

9. 发明申请

US20050046672A1 Thermally conductive thermal actuator and liquid drop emitter using same 有权
标题翻译：导热式热致动器和使用其的液滴式发射器
公开(公告)号：US20050046672A1
公开(公告)日：2005-03-03
申请号：US10650874
申请日：2003-08-28
申请人： Antonio Cabal , John Lebens , Stephen Pond
发明人： Antonio Cabal , John Lebens , Stephen Pond
IPC分类号： B41J2/14 , B41J2/04
CPC分类号： B41J2/14427 , B41J2202/03
摘要： A thermal actuator for a micro-electromechanical device, especially a liquid drop emitter for ink jet printing, is disclosed. The thermal actuator comprises a base element and a movable element extending from the base element and residing at a first position. The movable element includes a barrier layer constructed of a barrier material having low thermal conductivity material, bonded between a first layer and a second layer; wherein the first layer is constructed of a first material having a high coefficient of thermal expansion and the second layer is constructed of a second material having a high thermal conductivity and a high Young's modulus. An apparatus is provided adapted to apply a heat pulse directly to the first layer, causing a thermal expansion of the first layer relative to the second layer and deflection of the movable element to a second position, followed by relaxation of the movable element towards the first position as heat diffuses through the barrier layer to the second layer. Configurations of the movable element as a cantilever, doubly-anchored beam and clamped plate are disclosed. Diamond and silicon carbide materials are well suited for use as the second material. Titanium aluminide is a preferred material for the first material.
摘要翻译：公开了用于微机电装置的热致动器，特别是用于喷墨印刷的液滴发射器。热致动器包括基座元件和从基座元件延伸并位于第一位置的可移动元件。可移动元件包括由具有低导热性材料的阻挡材料构成的阻挡层，结合在第一层和第二层之间; 其中所述第一层由具有高热膨胀系数的第一材料构成，所述第二层由具有高热导率和高杨氏模量的第二材料构成。提供一种适于将加热脉冲直接施加到第一层的装置，引起第一层相对于第二层的热膨胀和可移动元件的偏转到第二位置，随后可移动元件朝向第一层松弛作为热的位置通过阻挡层扩散到第二层。公开了作为悬臂，双重锚定梁和夹紧板的可移动元件的构造。金刚石和碳化硅材料非常适合用作第二种材料。钛酸铝是第一种材料的优选材料。

10. 发明申请

US20060109309A1 Doubly-anchored thermal actuator having varying flexural rigidity 有权
公开(公告)号：US20060109309A1
公开(公告)日：2006-05-25
申请号：US10994686
申请日：2004-11-22
申请人： Antonio Cabal , Stephen Pond
发明人： Antonio Cabal , Stephen Pond
IPC分类号： B41J2/04
CPC分类号： B41J2/14427 , B41J2/1628 , B41J2/1629 , B41J2/1639 , B41J2/1646 , B41J2/1648 , B41J2/17596
摘要： A doubly-anchored thermal actuator for a micro-electromechanical device such as a liquid drop emitter or a fluid control microvalve is disclosed. The thermal actuator is comprised of a base element formed with a depression having opposing anchor. A deformable element, attached to the base element at the opposing anchor edges, is constructed as a planar lamination including a first layer of a first material having a low coefficient of thermal expansion and a second layer of a second material having a high coefficient of thermal expansion. The deformable element has anchor portions adjacent the anchor edges and a central portion between the anchor portions wherein the flexural rigidity of the anchor portions is substantially less than the flexural rigidity of the central portion. The doubly-anchored thermal actuator further comprises apparatus adapted to apply a heat pulse to the deformable element that causes a sudden rise in the temperature of the deformable element. The deformable element bows outward in a direction toward the second layer, and then relaxes to a residual shape as the temperature decreases. The doubly-anchored thermal actuator is configured with a liquid chamber having a nozzle or a fluid flow port to form a liquid drop emitter or a fluid control microvalve, or to activate an electrical microswitch. Heat pulses are applied to the deformable element by resistive heating or by light energy pulses.

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