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    Inkjet printhead with low thermal product layer
    1.
    发明申请
    Inkjet printhead with low thermal product layer 失效
    具有低热产品层的喷墨打印头

    公开(公告)号：US20060221137A1

    公开(公告)日：2006-10-05

    申请号：US11097310

    申请日：2005-04-04

    申请人： Kia Silverbrook ,  Gregory McAvoy ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Paul Reichl

    发明人： Kia Silverbrook ,  Gregory McAvoy ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Paul Reichl

    IPC分类号： B41J2/05

    CPC分类号： B41J2/1642 ,  B41J2/1412 ,  B41J2/155 ,  B41J2/1601 ,  B41J2/1623 ,  B41J2/1628 ,  B41J2/1631 ,  B41J2/1639 ,  B41J2/1645 ,  B41J2/1646 ,  B41J2002/1437 ,  B41J2002/14491 ,  B41J2202/20

    摘要： A thermal inkjet printhead with generally planar heater elements disposed in respective bubble forming chambers such that they are bonded on one side to the chamber so that the other side faces into the chamber. Each heater element receives an energizing pulse to heat ejectable liquid above its boiling point to form a gas bubble on the side facing into the chamber, whereby the gas bubble causes the ejection of a drop of the ejectable liquid from the nozzle. The chamber has a dielectric layer proximate the side of the heater element bonded to the chamber. The dielectric layer has a thermal product less than 1495 Jm−2K−1s−1/2, the thermal product being (ρCk)1/2, where ρ is the density of the layer, C is specific heat of the layer and k is thermal conductivity of the layer. The present invention reduces the drop ejection energy and the heat dissipation into the printhead IC by improving the thermal isolation between the heater and the substrate.

    摘要翻译： 一种热喷墨打印头，其具有大致平面的加热器元件，其设置在相应的气泡形成室中，使得它们在一侧结合到腔室，使得另一侧面向腔室。 每个加热器元件接收一个激励脉冲，以在其沸点之上加热可喷射的液体，以在面向腔室的一侧形成气泡，由此气泡引起喷射液滴从喷嘴喷出。 腔室具有靠近加热器元件侧面的电介质层，该电介质层与腔室结合。 电介质层的热产物为（rhoCk）小于1495J / cm 2的热产物， 其中rho是层的密度，C是层的比热，k是层的热导率。 本发明通过改善加热器和基板之间的热隔离来减小液滴喷射能量和散热到打印头IC中。

    Inkjet nozzle with reduced fluid inertia and viscous drag
    3.
    发明申请
    Inkjet nozzle with reduced fluid inertia and viscous drag 有权
    喷墨喷嘴具有减少的流体惯性和粘性阻力

    公开(公告)号：US20070030312A1

    公开(公告)日：2007-02-08

    申请号：US11545509

    申请日：2006-10-11

    申请人： Kia Silverbrook ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Gregory McAvoy

    发明人： Kia Silverbrook ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Gregory McAvoy

    IPC分类号： B41J2/05

    CPC分类号： B41J2/1601 ,  B41J2/1404 ,  B41J2/14072 ,  B41J2/1412 ,  B41J2/1603 ,  B41J2/1623 ,  B41J2/1628 ,  B41J2/1631 ,  B41J2/1635 ,  B41J2/1639 ,  B41J2/1642 ,  B41J2/1645 ,  B41J2/1646 ,  B41J2002/14362 ,  B41J2002/1437 ,  B41J2002/14475 ,  B41J2002/14491 ,  B41J2202/19 ,  B41J2202/20 ,  B41J2202/21

    摘要： A thermal inkjet printhead with heater elements disposed in respective bubble forming chambers for heating a water-based printing fluid to form a gas bubble for ejecting a drop of the printing fluid from the nozzle. The heater is separated from the nozzle by less than 5 μm at their closest points and the nozzle length is less than 5 μm. The volume of liquid between the heater and the nozzle determines the inertia of the liquid and its acceleration in response to bubble formation. Moving the heater closer to the nozzle reduces the inertia of the liquid and increases its acceleration, so a lower bubble impulse is needed to eject a drop. This allows the printhead to use smaller heater elements with lower power requirements. Viscous drag in the nozzle reduces the momentum of fluid flowing through the nozzle. The viscous drag increases as the nozzle length (in the direction of fluid flow) increases. By reducing the nozzle length, a lower bubble impulse is needed to eject a drop. This also allows the printhead to use smaller heater elements with lower power requirements.

    摘要翻译： 一种热喷墨打印头，其具有设置在各个气泡形成室中的加热器元件，用于加热水性印刷流体以形成用于从喷嘴喷射一滴印刷液体的气泡。 加热器在最近的点处与喷嘴分开小于5um，喷嘴长度小于5um。 加热器和喷嘴之间的液体体积决定了液体的惯性及其响应气泡形成的加速度。 将加热器靠近喷嘴移动可减少液体的惯性并增加其加速度，因此需要较低的气泡脉冲来喷射液滴。 这允许打印头使用具有较低功率要求的较小的加热器元件。 喷嘴中的粘性阻力减小了流经喷嘴的流体的动量。 随着喷嘴长度（在流体流动方向），粘性阻力增加。 通过减小喷嘴长度，需要较低的气泡脉冲来喷射液滴。 这也允许打印头使用较低功率要求的较小的加热元件。

    Printhead nozzle with reduced ink inertia and viscous drag
    5.
    发明申请
    Printhead nozzle with reduced ink inertia and viscous drag 有权
    打印头喷嘴减少油墨惯性和粘滞阻力

    公开(公告)号：US20050280672A1

    公开(公告)日：2005-12-22

    申请号：US11212637

    申请日：2005-08-29

    申请人： Kia Silverbrook ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Gregory McAvoy

    发明人： Kia Silverbrook ,  Angus North ,  Samuel Mallinson ,  Mehdi Azimi ,  Gregory McAvoy

    IPC分类号： B41J2/04 ,  B41J2/14 ,  B41J2/16

    CPC分类号： B41J2/1601 ,  B41J2/1404 ,  B41J2/14072 ,  B41J2/1412 ,  B41J2/1603 ,  B41J2/1623 ,  B41J2/1628 ,  B41J2/1631 ,  B41J2/1635 ,  B41J2/1639 ,  B41J2/1642 ,  B41J2/1645 ,  B41J2/1646 ,  B41J2002/14362 ,  B41J2002/1437 ,  B41J2002/14475 ,  B41J2002/14491 ,  B41J2202/19 ,  B41J2202/20 ,  B41J2202/21

    摘要： A thermal inkjet printhead with heater elements disposed in respective bubble forming chambers for heating part of the ejectable liquid above its boiling point to form a gas bubble that causes the ejection of a drop of the ejectable liquid from the nozzle, wherein, the heater is separated from the nozzle by less than 5 μm at their closest points; the nozzle length is less than 5 μm; and the ejectable liquid has a viscosity less than 5 cP. The volume of liquid between the heater and the nozzle determines the inertia of the liquid and its acceleration in response to bubble formation. Moving the heater closer to the nozzle reduces the inertia of the liquid and increases its acceleration, so a lower bubble impulse is needed to eject a drop. This allows the printhead to use smaller heater elements with lower power requirements. Viscous drag in the nozzle reduces the momentum of fluid flowing through the nozzle. The viscous drag increases as the nozzle length (in the direction of fluid flow) increases. By reducing the nozzle length, a lower bubble impulse is needed to eject a drop. This also allows the printhead to use smaller heater elements with lower power requirements.

    摘要翻译： 一种热喷墨打印头，其具有设置在相应的气泡形成室中的加热器元件，用于将可喷射液体的一部分加热到其沸点之上，以形成气泡，该气泡导致从喷嘴排出一滴可喷射液体，其中，加热器被分离 在最接近的点处，喷嘴小于5um; 喷嘴长度小于5um; 并且可喷射液体的粘度小于5cP。 加热器和喷嘴之间的液体体积决定了液体的惯性及其响应气泡形成的加速度。 将加热器靠近喷嘴移动可减少液体的惯性并增加其加速度，因此需要较低的气泡脉冲来喷射液滴。 这允许打印头使用具有较低功率要求的较小的加热器元件。 喷嘴中的粘性阻力减小了流经喷嘴的流体的动量。 随着喷嘴长度（在流体流动方向），粘性阻力增加。 通过减小喷嘴长度，需要较低的气泡脉冲来喷射液滴。 这也允许打印头使用较低功率要求的较小的加热元件。

    Printhead heaters with a nanocrystalline composite structure
    8.
    发明申请
    Printhead heaters with a nanocrystalline composite structure 有权
    具有纳米晶复合结构的印刷头加热器

    公开(公告)号：US20060221134A1

    公开(公告)日：2006-10-05

    申请号：US11097213

    申请日：2005-04-04

    申请人： Kia Silverbrook ,  Gregory McAvoy ,  Angus North

    发明人： Kia Silverbrook ,  Gregory McAvoy ,  Angus North

    IPC分类号： B41J2/05

    CPC分类号： B41J2/1412 ,  B41J2/1601 ,  B41J2/1628 ,  B41J2/1631 ,  B41J2/1639 ,  B41J2/1642 ,  B41J2/1645 ,  B41J2/1646 ,  B41J2002/1437 ,  B41J2002/14475 ,  B41J2002/14491 ,  B41J2202/03 ,  B41J2202/20

    摘要： A thermal inkjet printhead with bubble forming heater elements formed from a material with a nanocrystalline composite structure. Nanocrystalline composite films can be superhard and can facilitate removal of the SiC and Ta anti-cavitation wear coatings. Improved oxidation resistance can also be achieved with some nanocrystalline composites, facilitating removal of the Si3N4 oxidation prevention coating. By removing or reducing the protective coatings, the heater element requires much less energy to form a bubble in the ink. A further benefit is improved crack resistance, which can extend the lifetime of uncoated heaters.

    摘要翻译： 具有由具有纳米晶复合结构的材料形成的气泡形成加热元件的热​​喷墨打印头。 纳米晶复合膜可以超硬，可以方便地去除SiC和Ta抗气蚀磨损涂层。 还可以通过一些纳米晶体复合材料来实现改进的抗氧化性，有助于去除Si 3 N 4 N 3氧化防止涂层。 通过去除或减少保护涂层，加热器元件需要更少的能量以在油墨中形成气泡。 另外的好处是提高抗裂性，这可以延长未涂覆的加热器的使用寿命。

    Inkjet printhead for printing with low density keep-wet dots
    10.
    发明申请
    Inkjet printhead for printing with low density keep-wet dots 有权
    喷墨打印头用于打印低密度保湿点

    公开(公告)号：US20060221107A1

    公开(公告)日：2006-10-05

    申请号：US11097335

    申请日：2005-04-04

    申请人： Kia Silverbrook ,  Simon Walmsley ,  Angus North ,  Gregory McAvoy

    发明人： Kia Silverbrook ,  Simon Walmsley ,  Angus North ,  Gregory McAvoy

    IPC分类号： B41J29/38 ,  B41J2/05

    CPC分类号： B41J2/1628 ,  B41J2/1404 ,  B41J2/1412 ,  B41J2/1603 ,  B41J2/1631 ,  B41J2/1642 ,  B41J2002/1437 ,  B41J2002/14475 ,  B41J2002/14491 ,  B41J2202/20

    摘要： An inkjet printhead with a plurality of nozzles, a bubble forming chamber corresponding to each of the nozzles respectively, the bubble forming chambers adapted to contain ejectable liquid, a heater element positioned in each of the bubble forming chambers respectively for heating the ejectable liquid to form a gas bubble that causes the ejection of a drop of the ejectable liquid from the nozzle; and, a print engine controller for controlling the operation of the heater elements; wherein during use, the print engine controller heats the ejectable liquid with the heater element to lower its viscosity prior to a print job; and during printing, the print engine controller ensures that the time interval between successive actuations of each of the heater elements is less than a predetermined time in which the viscosity of the ejectable liquid in the increases to a threshold.

    摘要翻译： 具有多个喷嘴的喷墨打印头，分别对应于每个喷嘴的气泡形成室，适于容纳可喷射液体的气泡形成室，分别定位在每个气泡形成室中的加热器元件，用于加热可喷射液体以形成 导致从喷嘴喷出可滴出液体的液滴的气泡; 以及用于控制加热器元件的操作的打印引擎控制器; 其中在使用期间，所述打印引擎控制器利用所述加热器元件加热所述可喷射液体以在打印作业之前降低其粘度; 并且在打印期间，打印引擎控制器确保每个加热器元件的连续致动之间的时间间隔小于其中可喷射液体的粘度增加到阈值的预定时间。