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    ASYMMETRICAL CONFIGURATION OF FLUID-EJECTION ELEMENT GROUPS, PORTS, AND CHANNELS OF PRINTHEAD
    1.
    发明申请
    ASYMMETRICAL CONFIGURATION OF FLUID-EJECTION ELEMENT GROUPS, PORTS, AND CHANNELS OF PRINTHEAD 审中-公开

    公开(公告)号：WO2022086546A1

    公开(公告)日：2022-04-28

    申请号：PCT/US2020/056998

    申请日：2020-10-23

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

    Inventor： CLARK, Garrett E. ,  CHOY, Si-lam ,  MARTIN, Eric Thomas ,  LUM, Jacob ,  PRZYBYLA, James R.

    IPC: B41J2/14 ,  B41J2/18

    Abstract: A fluid-ejection printhead includes channel, interposer, and fluidejection layers. The channel layer has first and second supply channels and first and second return channels. The interposer layer defines first and second inlet ports respectively fluidically connected to the first and second supply channels, and first and second outlet ports respectively fluidically connected to the first and second return channels. The fluid-ejection layer includes first and second fluid-ejection element groups fluidically connected to the first supply and return channels and the second supply and return channels, respectively. The first fluid-ejection element group, ports, and channels are asymmetrically configured relative to the second fluid-ejection element group, ports, and channels.

    NON-NUCLEATION FLUID ACTUATOR MEASUREMENTS
    3.
    发明申请
    NON-NUCLEATION FLUID ACTUATOR MEASUREMENTS 审中-公开

    公开(公告)号：WO2019177568A1

    公开(公告)日：2019-09-19

    申请号：PCT/US2018/021990

    申请日：2018-03-12

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

    Inventor： MARTIN, Eric ,  YAMASHITA, Tsuyoshi ,  PRZYBYLA, James R.

    IPC: B41F33/00 ,  B41J2/04

    Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. Each actuator is disposed in a fluid chamber. The fluidic die also includes an array of fluid sensors. Each fluid sensor is disposed within a fluid chamber and determines a characteristic within the fluid chamber. A data parser of the fluidic die extracts from an incoming signal, firing instructions and measurement instructions for the fluidic die. The measurement instructions indicate at least one of a peak measurement during a nucleation event and a reference measurement during a non-nucleation event. A firing controller generates firing signals based on the firing instructions and a measurement controller activates, during a measurement interval of a printing cycle for the primitive, a measurement for a selected actuator based on the measurement instructions.

    ON-DIE LOGIC TO SUPPRESS FLUIDIC ACTUATOR OPERATION
    5.
    发明申请
    ON-DIE LOGIC TO SUPPRESS FLUIDIC ACTUATOR OPERATION 审中-公开

    公开(公告)号：WO2021242259A1

    公开(公告)日：2021-12-02

    申请号：PCT/US2020/035326

    申请日：2020-05-29

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

    Inventor： MARTIN, Eric T. ,  PRZYBYLA, James R. ,  RICHARDS, Paul A. ,  BICKNELL, Robert Newton

    IPC: B41J29/393 ,  B41J2/175

    Abstract: According to examples, an apparatus may include a plurality of fluidic actuators and a fluidic actuator control circuit to control operation of the plurality of fluidic actuators. The fluidic actuator control circuit may have on-die logic. In some examples, a controller may generate a signal to cause the fluidic actuator control circuit to control the plurality of fluidic actuators. The controller may monitor a condition of a selected fluidic chamber. Based on the signal, the on-die logic may suppress an operation of a selected fluidic actuator of the plurality of fluidic actuators corresponding to the selected fluidic chamber for a predetermined time period.

    FLUID EJECTION WITH MICROPUMPS AND PRESSURE-DIFFERENCE BASED FLUID FLOW
    6.
    发明申请
    FLUID EJECTION WITH MICROPUMPS AND PRESSURE-DIFFERENCE BASED FLUID FLOW 审中-公开

    公开(公告)号：WO2020023002A1

    公开(公告)日：2020-01-30

    申请号：PCT/US2018/043223

    申请日：2018-07-23

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

    Inventor： PRZYBYLA, James R. ,  MORRIS, Jordan E.

    IPC: B41J2/045 ,  B41J2/145

    Abstract: The fluid ejection device includes a plurality of nozzles and a plurality of ejection chambers that includes a respective ejection chamber fluidically coupled to a respective nozzle. A plurality of inlet passages are fluidically coupled to the ejection chambers and input fluid to the ejection chambers at a first pressure. A plurality of outlet passages are fluidically coupled to the ejection chambers and output fluid from the ejection chambers at a second pressure that is less than the first pressure. Fluid circulates through the ejection chambers based on the pressure difference between the first and second pressure. The fluid ejection device also includes at least one micropump fluidically coupled to at least one ejection chamber to pump fluid through the at least one ejection chamber.

    JETTABLE MATERIAL FIRING CHAMBER CHECK VALVE
    10.
    发明申请
    JETTABLE MATERIAL FIRING CHAMBER CHECK VALVE 审中-公开
    可燃材料燃烧室检查阀

    公开(公告)号：WO2017010994A1

    公开(公告)日：2017-01-19

    申请号：PCT/US2015/040372

    申请日：2015-07-14

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

    Inventor： NAELI, Kianoush ,  PRZYBYLA, James R.

    IPC: B41J2/14 ,  F16K15/00

    CPC classification number: B41J2/055 ,  B41J2/1404 ,  B41J2/14145

    Abstract: A check valve for preventing reverse flow of jettable material within a jettable material firing chamber during a firing event includes a free-floating plug. The check valve further includes at least one holding post, wherein the free-floating plug is arranged between at least one wall of the firing chamber and the holding posts, the at least one wall and the holding posts restricting the movement of the free-floating plug within the chamber.

    Abstract translation: 在点火事件期间用于防止可喷射材料燃烧室内的可喷射材料反向流动的止回阀包括自由浮动塞子。 止回阀还包括至少一个保持柱，其中自由浮动塞被布置在燃烧室的至少一个壁和保持柱之间，所述至少一个壁和保持柱限制自由浮动的运动 插入室内。

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