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    RECIRCULATION BYPASS
    1.
    发明申请
    RECIRCULATION BYPASS 审中-公开

    公开(公告)号：WO2021183121A1

    公开(公告)日：2021-09-16

    申请号：PCT/US2020/022034

    申请日：2020-03-11

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

    Inventor： LUM, Jacob M. ,  CHOY, Si-lam J. ,  POLLARD, Jeffrey R. ,  YAMASHITA, Tsuyoshi ,  SELLS, Jeremy ,  CLARK, Garrett E.

    IPC: B41J2/18 ,  B41J2/14

    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.

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