公开(公告)号：US11292265B2

公开(公告)日：2022-04-05

申请号：US16761273

申请日：2017-12-02

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

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

IPC: B41J2/18 ,  B41J2/14

Abstract: A fluid circulation and ejection system may include a microfluidic die, a single orifice fluid ejector having a drive chamber in the microfluidic die and a pressurized fluid source remote from the microfluidic die to create a pressure gradient across the drive chamber to circulate fluid across the drive chamber.

公开(公告)号：US11331923B2

公开(公告)日：2022-05-17

申请号：US16493071

申请日：2017-11-10

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

Inventor： Si-Lam Choy

IPC: B41J2/175

Abstract: An assembly, in an example, may include at least one die, a substrate comprising at least one electrical trace, a lid coupled to a first side of the substrate to contain an amount of fluid between the substrate and lid, and an adhesive film coupled to a second side of the substrate to protect the at least one electrical trace wherein the lid further comprises a main chamber for each of at least two distinct fluids and an overflow chamber fluidically coupled to each of the main chambers via an overflow channel.

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.