公开(公告)号：US20220379627A1

公开(公告)日：2022-12-01

申请号：US17772760

申请日：2019-11-13

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

Inventor： Jacob Lum ,  James A. Feinn ,  Mengqian Lu ,  Garrett E. Clark

IPC: B41J2/18

Abstract: An example printhead includes a circulation channel having an inlet for receiving a fluid and an outlet for expelling the fluid, a first nozzle fluidically coupled to the circulation channel, the first nozzle being operable at a first absolute pressure, and a second nozzle fluidically coupled to the circulation channel, the second nozzle being operable at a second absolute pressure, the absolute second pressure being lower than the first absolute pressure. The absolute pressure in the circulation channel decreases as the fluid flows from the inlet to the outlet, and the first nozzle is positioned closer to the inlet of the circulation channel than the second nozzle.

公开(公告)号：US20220161564A1

公开(公告)日：2022-05-26

申请号：US17667463

申请日：2022-02-08

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

Inventor： Jacob Lum ,  Jeremy Sells ,  Si-lam Choy

IPC: B41J2/175 ,  B41J2/14

Abstract: A fluidic die may include a fluid channel layer defining a number of fluid channels therein, a slot layer disposed on a side of the fluid channel layer, and a first fluid slot and a second fluid slot defined in the slot layer. At least one of the fluid channels fluidically couples the first fluid slot to the second fluid slot. The first fluid slot and the second fluid slot are defined in the slot layer along a length of the fluidic die.