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    Method of recovering a printhead when mounted in a printing device
    3.
    发明公开
    Method of recovering a printhead when mounted in a printing device 审中-公开
    一种用于安装打印头的在打印设备中的恢复过程

    公开(公告)号：EP1577108A3

    公开(公告)日：2007-08-08

    申请号：EP05103848.7

    申请日：2000-04-20

    申请人： Hewlett-Packard Company

    发明人： Bruch, Xavier ,  Calvo, Lidia ,  Jurjo, Jose ,  Murcia, Antoni ,  Girones, Xavier ,  Taylor, Christopher ,  Vega, Ramon

    IPC分类号： B41J29/393 ,  B41J2/165

    CPC分类号： B41J2/0451 ,  B41J2/04536 ,  B41J2/04558 ,  B41J2/04561 ,  B41J2/0458 ,  B41J2/04581 ,  B41J2/16579 ,  B41J11/706 ,  B41J29/393 ,  B41J2202/17

    摘要： An inkjet printing device for printing plots comprises a printhead (300), having a plurality of nozzles (310); a servicing unit (80) capable of applying recovery functions to said plurality of nozzles (310); a plurality of recovery functions (1940, 1980, 1990, 2060, 2040, 2020, 2195, 2185, 2160, 2177, 2167, 2165, 2280, 2270, 2265, 2250) for recovering said plurality of nozzles (310), wherein each recovery function of said plurality of recovery functions (1940, 1980, 1990, 2060, 2040, 2020, 2195, 2185, 2160, 2177, 2167, 2165, 2280, 2270, 2265, 2250) is associated to at least one cause of failure of a nozzle; detection means (1900) to detect the cause of failure of a nozzle based on how the failure evolved over time, and selecting means (1900), responsive to the cause of failure identified by the detection means, to select a recovery function from said plurality of recovery functions (1940, 1980, 1990, 2060, 2040, 2020, 2195, 2185, 2160, 2177, 2167, 2165, 2280, 2270, 2265, 2250), to be applied by said servicing unit (80). Said device further comprises means to select and execute at least one of said plurality of functions, responsive to the data stored in said memory means. A method of recovering a printhead mounted in an inkjet printing device; comprising the steps of defining a set of causes of failure for the printhead, checking if one or more nozzles (310) are failing, identifying the cause of failure of a failing nozzle within said set by observing how the failure evolved over time; based on the identified cause of failure, performing an appropriate function for recovering the failing nozzle (310).

    Calibration And Measurement Techniques For Printers
    8.
    发明公开
    Calibration And Measurement Techniques For Printers 审中-公开
    打印机的校准和测量技术

    公开(公告)号：EP1503573A2

    公开(公告)日：2005-02-02

    申请号：EP04103149.3

    申请日：2004-07-02

    申请人： Hewlett-Packard Development Company, L.P.

    发明人： SUBIRADA, Francesc ,  GASTON, DAVID

    IPC分类号： H04N1/23

    CPC分类号： H04N1/23

    摘要： Techniques for calibrating a scanner (80) mounted on a scanning carriage (40) of an image forming device (20). The scanner array can also be used for print media border location.

    摘要翻译： 用于校准安装在图像形成装置（20）的扫描托架（40）上的扫描仪（80）的技术。 扫描仪阵列也可用于打印介质边界位置。

    Techniques for measuring the position of marks on media and for aligning inkjet devices
    10.
    发明公开
    Techniques for measuring the position of marks on media and for aligning inkjet devices 有权
    用于测量在介质上的标记的位置和用于对准喷墨器件的技术

    公开(公告)号：EP1176802A3

    公开(公告)日：2004-03-03

    申请号：EP01118313.4

    申请日：2001-07-27

    申请人： Hewlett Packard Company, a Delaware Corporation

    发明人： Castano, Jorge ,  Subirada, Francesc

    IPC分类号： H04N1/50

    CPC分类号： H04N1/50 ,  B41J2/2135 ,  B41J19/145

    摘要： An optical sensor (80) for detecting the position of marks on a medium (84), wherein relative motion is provided between the optical sensor and the medium during an optical sensing operation. The optical sensor produces an electrical sensor signal (86A), and has a field of view at the media in a direction of the relative movement. The marks have a nominal dimension in the direction of the relative movement, and the field of view is larger than the nominal dimension. This produces a sensor signal with a clear and relatively sharp peak in response to scanning the media mark. A method of sensing locations of marks printed by ink-jet nozzles of a plurality of printheads mounted on a scanning carriage, which includes printing an alignment pattern (150) on a print medium, the alignment pattern comprising a set of target or reference marks printed using a subset of the nozzles on each of the plurality of printheads, and a set of color marks (170) printed using a subset of the nozzles from only one of the printheads.