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    FLUIDIC EJECTION DIES WITH ENCLOSED CROSS-CHANNELS
    1.
    发明申请
    FLUIDIC EJECTION DIES WITH ENCLOSED CROSS-CHANNELS 有权

    公开(公告)号：US20210291547A1

    公开(公告)日：2021-09-23

    申请号：US17340570

    申请日：2021-06-07

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

    Inventor： Si-Iam Choy ,  Michael W. Cumbie ,  Chien-Hua Chen ,  Jeffrey R. Pollard

    IPC: B41J2/18

    Abstract: In one example in accordance with the present disclosure, a fluidic ejection die is described. The die includes an array of nozzles. Each nozzle includes an ejection chamber and an opening. A fluid actuator is disposed within the ejection chamber. The fluidic ejection die also includes an array of passages, formed in a substrate, to deliver fluid to and from the ejection chamber. The fluidic ejection die also includes an array of enclosed cross-channels. Each enclosed cross-channel of the array of enclosed cross-channels is fluidly connected to a respective plurality of passages of the array of passages.

    Recirculation bypass
    2.
    发明授权
    Recirculation bypass 有权

    公开(公告)号：US12023937B2

    公开(公告)日：2024-07-02

    申请号：US17798902

    申请日：2020-03-11

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

    Inventor： Jacob M. Lum ,  Si-lam J. Choy ,  Jeffrey R. Pollard ,  Tsuyoshi Yamashita ,  Jeremy Sells ,  Garrett E. Clark

    IPC: B41J2/18 ,  B41J2/14

    CPC classification number: B41J2/18 ,  B41J2/1408

    Abstract: A fluid ejection die may include a fluid actuator, a substrate supporting the fluid actuator, a chamber layer supported by the substrate and a bypass passage in the substrate. The substrate may include a closed inlet channel having an inlet opening for connection to an outlet of a fluid source and an outlet channel having an outlet opening of a first size for connection to an inlet of the fluid source. The chamber layer includes a recirculation passage to supply fluid for ejection by the fluid actuator through an ejection orifice and to circulate fluid across the fluid actuator from the closed inlet channel to the outlet channel. The bypass passage is of a second size less than the first size and connects the inlet channel to the inlet of the fluid source while bypassing any fluid actuator provided for ejecting fluid through an ejection orifice.

    FLUID EJECTION DEVICE
    3.
    发明申请
    FLUID EJECTION DEVICE 有权
    流体喷射装置

    公开(公告)号：US20130200175A1

    公开(公告)日：2013-08-08

    申请号：US13834524

    申请日：2013-03-15

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

    Inventor： Jeffrey R. Pollard ,  Tsuyoshi Yamashita

    IPC: B41J2/14 ,  B41J2/16

    CPC classification number: B41J2/14274 ,  B41J2/161 ,  B41J2/1612 ,  B41J2/1623 ,  B41J2/1632 ,  B41J2/1646 ,  Y10T156/1052

    Abstract: A fluid ejection device includes a flexible membrane, an adhesive layer, a piezoelectric material layer, and first and second electrically conductive layers. The adhesive layer and the piezoelectric material layer include edge regions and central regions. A surface of the edge region of the piezoelectric material layer is coplanar with a surface of the edge region of the adhesive layer. The first electrically conductive layer is between the piezoelectric material layer and the adhesive layer such that a surface of the first electrically conductive layer is coplanar with the surface of the edge region of the piezoelectric material layer and the surface of the edge region of the adhesive layer. The second electrically conductive layer is over the surface of the edge region of the piezoelectric material layer, the surface of the edge region of the adhesive layer, the surface of the first electrically conductive layer, and the flexible membrane.

    Abstract translation: 流体喷射装置包括柔性膜，粘合剂层，压电材料层以及第一和第二导电层。 粘合剂层和压电材料层包括边缘区域和中心区域。 压电材料层的边缘区域的表面与粘合剂层的边缘区域的表面共面。 第一导电层在压电材料层和粘合剂层之间，使得第一导电层的表面与压电材料层的边缘区域的表面和粘合剂层的边缘区域的表面共面 。 第二导电层在压电材料层的边缘区域的表面，粘合剂层的边缘区域的表面，第一导电层的表面和柔性膜之上。

    Cross-die recirculation channels and chamber recirculation channels
    5.
    发明授权
    Cross-die recirculation channels and chamber recirculation channels 有权

    公开(公告)号：US11065883B2

    公开(公告)日：2021-07-20

    申请号：US16493045

    申请日：2017-11-27

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

    Inventor： Chien-Hua Chen ,  Jeffrey R. Pollard ,  Michael W. Cumbie ,  Si-Lam Choy

    IPC: B41J2/18

    Abstract: A die may, in an example, include at least one cross-die recirculation channel formed into the die to recirculate an amount of printing fluid therethrough, the cross-die recirculation channel including a first-sized inlet port and a first-sized outlet port formed on a first side of the die, at least one chamber recirculation channel formed into the die and fluidically coupled to the cross-die recirculation channel to recirculate an amount of printing fluid therethrough, the chamber recirculation channel including a second-sized inlet port and a second-sized outlet port, at least one pump formed within the chamber recirculation channel to recirculate the amount of printing fluid therethrough.

    CROSS-DIE RECIRCULATION CHANNELS AND CHAMBER RECIRCULATION CHANNELS
    8.
    发明申请
    CROSS-DIE RECIRCULATION CHANNELS AND CHAMBER RECIRCULATION CHANNELS 审中-公开

    公开(公告)号：US20200282738A1

    公开(公告)日：2020-09-10

    申请号：US16493045

    申请日：2017-11-27

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

    Inventor： Chien-Hua Chen ,  Jeffrey R. Pollard ,  Michael W. Cumbie ,  Si-La in Choy

    IPC: B41J2/18

    Abstract: A die may, in an example, include at least one cross-die recirculation channel formed into the die to recirculate an amount of printing fluid therethrough, the cross-die recirculation channel including a first-sized inlet port and a first-sized outlet port formed on a first side of the die, at least one chamber recirculation channel formed into the die and fluidically coupled to the cross-die recirculation channel to recirculate an amount of printing fluid therethrough, the chamber recirculation channel including a second-sized inlet port and a second-sized outlet port, at least one pump formed within the chamber recirculation channel to recirculate the amount of printing fluid therethrough.

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