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    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.

    Printhead with removable printhead cover
    4.
    发明授权
    Printhead with removable printhead cover 有权

    公开(公告)号：US10780699B2

    公开(公告)日：2020-09-22

    申请号：US15764273

    申请日：2015-10-08

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

    Inventor： Garrett E. Clark ,  Mark H. MacKenzie

    IPC: B41J2/165 ,  B41J2/175 ,  B41J2/16

    Abstract: In one example in accordance with the present disclosure a printhead is described. The printhead includes a number of nozzles to deposit an amount of fluid onto a print medium and an ink delivery system to deliver the amount of fluid from an ink tank to the number of nozzles. The printhead also includes an attachment feature to removably couple a removable printhead cover to the printhead. The printhead further includes a removable printhead cover removably coupled to the printhead at the attachment feature.

    Selecting nozzles
    5.
    发明授权
    Selecting nozzles 有权

    公开(公告)号：US10207497B2

    公开(公告)日：2019-02-19

    申请号：US15986593

    申请日：2018-05-22

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

    Inventor： Michael W. Cumbie ,  Garrett E. Clark ,  Mark H. MacKenzie

    IPC: B41J2/045

    Abstract: Selecting nozzles can include selecting nozzles of a plurality of nozzles to print a portion of a print job based on content of the print job and assigning firing reservations to the selected nozzles, where a total number of the firing reservations assigned to the selected nozzles is comparatively less than a total number of the plurality of nozzles.

    PRINT HEAD DIE
    8.
    发明申请
    PRINT HEAD DIE 有权
    打印头戴

    公开(公告)号：US20150314599A1

    公开(公告)日：2015-11-05

    申请号：US14418664

    申请日：2012-09-25

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

    Inventor： Garrett E. Clark ,  Chris Bakker ,  Mark H. MacKenzie ,  Michele D. Friesen

    IPC: B41J2/14 ,  B41J2/21

    CPC classification number: B41J2/1433 ,  B41J2/1404 ,  B41J2/14072 ,  B41J2/14145 ,  B41J2/21 ,  B41J2/2103 ,  B41J2/2128 ,  B41J2/2146 ,  B41J2002/14491

    Abstract: A print head die is described. In one example, the print head die includes a substrate having liquid feed slots formed therein extending along a major dimension of the substrate and nozzles extending along opposite sides of each of the liquid feed slots; and electrical interconnect formed on the substrate along the major dimension adjacent a last one of the liquid feed slots. A first one of the liquid feed slots opposite the last liquid feed slot and farthest from the electrical interconnect supplies an ink using a higher drop volume than inks in other ones of the liquid feed slots. The last liquid feed slot supplies an ink having a higher contrast with the ink in the first liquid feed slot than with inks in other ones of the liquid feed slots.

    Abstract translation: 描述打印头模具。 在一个示例中，打印头模具包括其中形成有沿着基板的主要尺寸延伸的液体进料槽的基板和沿每个液体进料槽的相对侧延伸的喷嘴; 以及沿着与最后一个液体进料槽相邻的主要尺寸在基底上形成的电互连。 与最后一个液体供给槽相对的最远的液体进料槽中的第一个液体进料槽与液体进料槽中的其它液体进料槽中的油墨相比，使用较高的液滴体积提供油墨。 最后的液体进料槽提供与第一液体进料槽中的油墨具有更高对比度的油墨，而不是其它液体进料槽中的油墨。

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