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    PRINTHEAD WITH CIRCULATION CHANNEL
    2.
    发明申请
    PRINTHEAD WITH CIRCULATION CHANNEL 审中-公开

    公开(公告)号：WO2021096504A1

    公开(公告)日：2021-05-20

    申请号：PCT/US2019/061319

    申请日：2019-11-13

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

    Inventor： LUM, Jacob ,  FEINN, James A. ,  LU, Mengqian ,  CLARK, Garrett E.

    IPC: B41J2/155 ,  B41J2/11

    Abstract: An example printhead includes a circulation channel having an inlet for receiving a fluid and an outlet for expelling the fluid, a first nozzle fluidically coupled to the circulation channel, the first nozzle being operable at a first absolute pressure, and a second nozzle fluidically coupled to the circulation channel, the second nozzle being operable at a second absolute pressure, the absolute second pressure being lower than the first absolute pressure. The absolute pressure in the circulation channel decreases as the fluid flows from the inlet to the outlet, and the first nozzle is positioned closer to the inlet of the circulation channel than the second nozzle.

    PRINTHEAD WITH OFFSET CIRCULATION CHANNEL
    5.
    发明申请
    PRINTHEAD WITH OFFSET CIRCULATION CHANNEL 审中-公开

    公开(公告)号：WO2021118541A1

    公开(公告)日：2021-06-17

    申请号：PCT/US2019/065535

    申请日：2019-12-10

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

    Inventor： LUM, Jacob ,  FEINN, James A. ,  LU, Mengqian ,  CLARK, Garrett E.

    IPC: B41J2/14 ,  B41J2/18

    Abstract: An example printhead includes a set of circulation channels for flowing a fluid therethrough, the set of nozzles including higher-pressure channels and lower-pressure channels; a first nozzle array having a first nozzle; a second nozzle array having a second nozzle, the first nozzle and the second nozzle forming a row region; a first inter-channel passage fluidically coupling the first nozzle to a first pair of adjacent circulation channels, the first pair including a higher-pressure channel on a first side of a lower-pressure channel; and a second inter-channel passage fluidically coupling the second nozzle to a second pair of adjacent circulation channels, the second pair including a higher-pressure channel on a second side of a lower-pressure channel, the second side being opposite the first side.

    RECIRCULATION FLUID EJECTION DEVICE
    7.
    发明申请
    RECIRCULATION FLUID EJECTION DEVICE 审中-公开

    公开(公告)号：WO2021112866A1

    公开(公告)日：2021-06-10

    申请号：PCT/US2019/064838

    申请日：2019-12-06

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

    Inventor： LUM, Jacob ,  FEINN, James A. ,  LU, Mengqian

    IPC: B41J2/175 ,  B41J2/18

    Abstract: An example recirculation fluid ejection device includes a first unit droplet generator including a first actuator and a first nozzle between a first and a second fluid feed hole, the first fluid feed hole located on a first channel and the second fluid feed hole and a first pump located on a second channel. The example device includes a second unit droplet generator including a second actuator and a second nozzle between a third and a fourth fluid feed hole, the third feed hole located on a third channel and the fourth fluid feed hole and a second pump located on a fourth channel. The first and the second actuators eject fluid at substantially the same backpressure. A first pressure measurable at an inlet of the first channel and the third channel are different from a second pressure measurable at an outlet of the second channel and the fourth channel.

    ENHANCING TEMPERATURE DISTRIBUTION UNIFORMITY ACROSS A PRINTER DIE
    9.
    发明申请
    ENHANCING TEMPERATURE DISTRIBUTION UNIFORMITY ACROSS A PRINTER DIE 审中-公开
    通过打印机提高温度分配均匀性

    公开(公告)号：WO2015163881A1

    公开(公告)日：2015-10-29

    申请号：PCT/US2014/035278

    申请日：2014-04-24

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

    Inventor： HOLSTUN, Clayton L. ,  RONK, Kelly ,  FEINN, James A.

    IPC: B41J2/32

    CPC classification number: B41J2/04528 ,  B41J2/04541 ,  B41J2/04563 ,  B41J2/0458 ,  B41J2/04596 ,  B41J2/04598 ,  B41J2/155 ,  B41J2202/08

    Abstract: According to an example, in a method for enhancing temperature distribution uniformity across a printer die, in which the printer die includes a plurality of drop generators arranged in a plurality of columns, a warming map that identifies the drop generators of the plurality of drop generators that are to be supplied with warming pulses to enhance temperature distribution uniformity across the printer die may be accessed. The warming map may identify a non-uniform distribution of the drop generators across a column of the plurality of columns. In addition, the warming map may be implemented to supply the drop generators identified in the warming map as the drop generators that are to receive the warming pulses.

    Abstract translation: 根据一个例子，在一种用于提高打印机管芯上的温度分布均匀性的方法中，其中打印机管芯包括多个排列成多列的液滴发生器，其中识别多个液滴发生器的液滴发生器 为了提高整个印刷机模具的温度分布均匀性，可以获得加温脉冲。 变暖图可以识别多个列中的色谱柱发生器的不均匀分布。 此外，可以实施升温图，以将在升温图中识别的液滴发生器提供为用于接收加温脉冲的液滴发生器。

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