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    PRINTHEAD STRUCTURE
    15.
    发明申请
    PRINTHEAD STRUCTURE 有权
    打印结构

    公开(公告)号：US20160107442A1

    公开(公告)日：2016-04-21

    申请号：US14890494

    申请日：2013-06-28

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

    Inventor： Mark Sanders Taylor ,  Craig Olbrich ,  Byron K. Davis

    IPC: B41J2/145 ,  B41J2/05

    CPC classification number: B41J2/05 ,  B41J2/1404 ,  B41J2/145 ,  B41J3/60 ,  B41J2002/14475

    Abstract: In one example, a printhead structure includes: a first layer; an array of openings in the first layer to form printing fluid ejection chambers; a second layer on the first layer; an array of orifices through the second layer, each orifice located adjacent to one of the openings in the first layer; a groove in the first layer spanning substantially a full length of the array of openings; and multiple holes through the second layer to the groove in the first layer.

    Abstract translation: 在一个示例中，打印头结构包括：第一层; 第一层中的开口阵列以形成印刷液体喷射室; 第一层上的第二层; 通过第二层的孔的阵列，每个孔邻近第一层中的一个开口定位; 所述第一层中的凹槽基本上跨越所述开口阵列的整个长度; 以及穿过第二层的多个孔到第一层中的凹槽。

    CONTROL OF PUMP GENERATORS AND DROP GENERATORS
    16.
    发明申请
    CONTROL OF PUMP GENERATORS AND DROP GENERATORS 有权

    公开(公告)号：US20220332125A1

    公开(公告)日：2022-10-20

    申请号：US17765011

    申请日：2019-10-17

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

    Inventor： Craig Olbrich

    IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14

    Abstract: According to examples, an apparatus may include a pump generator having a first resistance level and being positioned within a fluid circulation channel and a drop generator having a second resistance level and being positioned within a fluid ejection chamber. The apparatus may also include a control line connected to both the pump generator and the drop generator and a controller. The controller may output, at a first time, a first signal having a first pulse duration to the control line, the first signal to cause fluid in the fluid circulation channel to reach or exceed a first temperature and fluid in the fluid ejection chamber to remain below the first temperature and may output, at a second time, a second signal having a second pulse duration, the second signal to cause fluid in the fluid circulation channel and the fluid ejection chamber to reach or exceed the first temperature.

    Microfluidic valve
    17.
    发明授权
    Microfluidic valve 有权

    公开(公告)号：US11441701B2

    公开(公告)日：2022-09-13

    申请号：US16621470

    申请日：2017-07-14

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

    Inventor： Craig Olbrich ,  Alexander N. Govyadinov

    IPC: F16K99/00

    Abstract: A microfluidic valve may include a firing chamber having an orifice, a first portion of a liquid conduit connected to the firing chamber at a first port, a second portion of the liquid conduit connected to the firing chamber at a second port and a thermal resistor. The thermal resistor is to form a bubble within the firing chamber to expel liquid from the firing chamber through the orifice such that a first meniscus forms across the first port and a second meniscus forms across the second port to interrupt liquid flow between the first portion and the second portion of the liquid conduit.

    FLUID SUPPLY CONTROL
    19.
    发明申请
    FLUID SUPPLY CONTROL 审中-公开

    公开(公告)号：US20200016892A1

    公开(公告)日：2020-01-16

    申请号：US16483088

    申请日：2017-04-06

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

    Inventor： Craig Olbrich ,  Joseph M Torgerson

    IPC: B41J2/045

    Abstract: Examples include a fluid ejection system. The fluid ejection system comprises a fluid supply reservoir, a fluid ejection die, a fluid delivery subsystem, and a control engine. The fluid ejection die comprises nozzles to eject fluid and at least one temperature sensor disposed on the die to sense a temperature of the fluid ejection die. The fluid delivery subsystem fluidly connects the fluid reservoir and the fluid ejection die, and the fluid delivery subsystem comprises at least one valve to regulate conveyance of fluid from the fluid supply reservoir to the fluid ejection die. The control engine controls the at least one valve to thereby regulate conveyance of fluid from the fluid supply reservoir to the fluid ejection die based at least in part on the temperature of the fluid ejection die.

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