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    Adaptive print head calibration process
    11.
    发明授权
    Adaptive print head calibration process 有权

    公开(公告)号：US10562300B2

    公开(公告)日：2020-02-18

    申请号：US16097527

    申请日：2016-07-19

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： Diana Canto Estany ,  Lawrence H White ,  Macia Sole Pons

    IPC: B41J2/045 ,  B41J2/14 ,  B41J29/38

    Abstract: Thermal inkjet printing wherein a printhead has ink ejection elements which are energizable by electrical pulses of a given energy with fire pulses of an amplitude (V) and a fire pulse width (fp). A printer controller sends commands to the printhead to spit ink drops, one or more temperature sensors coupled to the printhead measure a temperature of the printhead, and a calibration component coupled to the temperature sensor variably adjusts the fire pulse energy provided to the having ink ejection elements of the printhead. The calibration component initiates calibrating the printhead, spitting a number (X) of ink drops at a frequency (Y) by the electrical pulses, reading and storing printhead temperature, varying the fire pulse energy by repeating spitting ink drops and reading and storing printhead temperature, finding minimum temperature from the stored printhead temperatures, and deriving an operational fire pulse (fpop) from a fire pulse (fpon) that has produced the minimum temperature, wherein the printer controller uses the operational fire pulse (fpop) for printing.

    ADAPTIVE PRINT HEAD CALIBRATION PROCESS
    12.
    发明申请
    ADAPTIVE PRINT HEAD CALIBRATION PROCESS 审中-公开

    公开(公告)号：US20190126616A1

    公开(公告)日：2019-05-02

    申请号：US16097527

    申请日：2016-07-19

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： Diana Canto Estany ,  Lawrence H White ,  Macia Sole Pons

    IPC: B41J2/045 ,  B41J2/14

    Abstract: Thermal inkjet printing wherein a printhead has ink ejection elements which are energizable by electrical pulses of a given energy with fire pulses of an amplitude (V) and a fire pulse width (fp). A printer controller sends commands to the printhead to spit ink drops, one or more temperature sensors coupled to the printhead measure a temperature of the printhead, and a calibration component coupled to the temperature sensor variably adjusts the fire pulse energy provided to the having ink ejection elements of the printhead. The calibration component initiates calibrating the printhead, spitting a number (X) of ink drops at a frequency (Y) by the electrical pulses, reading and storing printhead temperature, varying the fire pulse energy by repeating spitting ink drops and reading and storing printhead temperature, finding minimum temperature from the stored printhead temperatures, and deriving an operational fire pulse (fpop) from a fire pulse (fpon) that has produced the minimum temperature, wherein the printer controller uses the operational fire pulse (fpop) for printing.

    Printhead maintenance
    15.
    发明授权
    Printhead maintenance 有权

    公开(公告)号：US10828899B2

    公开(公告)日：2020-11-10

    申请号：US16696714

    申请日：2019-11-26

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： Marta Coma Vives ,  Maria Dinares Argemi ,  David Butinya ,  Macia Sole Pons

    IPC: B41J2/165 ,  B41J25/34 ,  B41J2/21 ,  B41J25/316

    Abstract: Example methods for the maintenance of printheads are provided, the printheads comprising a reservoir containing a printing fluid with particles in suspension, and a nozzle plate. Example methods may comprise capping the nozzle plate of the printhead, and rotating the capped printhead. Example maintenance devices for printheads are also provided, comprising a support with a socket to attach a printhead to the support, a drive unit to rotate the support about a rotation axis, and a control unit connected to the drive unit to perform a predetermined rotation cycle.

    PRINTHEAD MAINTENANCE
    16.
    发明申请
    PRINTHEAD MAINTENANCE 审中-公开

    公开(公告)号：US20200094559A1

    公开(公告)日：2020-03-26

    申请号：US16696714

    申请日：2019-11-26

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： Marta Coma Vives ,  Maria Dinares Argemi ,  David Butinya ,  Macia Sole Pons

    IPC: B41J2/165 ,  B41J2/21 ,  B41J25/34 ,  B41J25/316

    Abstract: Example methods for the maintenance of printheads are provided, the printheads comprising a reservoir containing a printing fluid with particles in suspension, and a nozzle plate. Example methods may comprise capping the nozzle plate of the printhead, and rotating the capped printhead. Example maintenance devices for printheads are also provided, comprising a support with a socket to attach a printhead to the support, a drive unit to rotate the support about a rotation axis, and a control unit connected to the drive unit to perform a predetermined rotation cycle.

    Print head priming systems
    19.
    发明授权
    Print head priming systems 有权
    打印头启动系统

    公开(公告)号：US09168752B2

    公开(公告)日：2015-10-27

    申请号：US14057932

    申请日：2013-10-18

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Francesc Ros Cerro ,  Macia Sole Pons ,  David Ramirez Muela ,  Li Qian

    IPC: B41J2/165

    CPC classification number: B41J2/19 ,  B41J2/16526 ,  B41J2/1707 ,  B41J2/17513 ,  B41J2/17556 ,  B41J2002/17516

    Abstract: A print head priming system comprises a vent closure section to close a vent, where the vent is to compensate backpressure in a print head. An inlet to receive pressurized gas from a source of pressurized gas is to provide the pressurized gas to the print head. A pressure relief valve is to open in response to pressure in the print head reaching or exceeding a predetermined value by the provision of gas to the print head by the source of pressurized gas.

    Abstract translation: 打印头起动系统包括用于关闭通气口的通风口闭合部分，其中通风口用于补偿打印头中的背压。 从加压气体源接收加压气体的入口是将加压气体提供给打印头。 通过由加压气体源向打印头提供气体，压力释放阀将响应于打印头中的压力而达到或超过预定值而打开。

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