公开(公告)号：US20210023853A1

公开(公告)日：2021-01-28

申请号：US17068443

申请日：2020-10-12

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

Inventor： Nick McGuinness ,  Lawrence H White ,  Paul A Richards

IPC: B41J2/19 ,  B41J2/175 ,  B41J2/14 ,  B41J2/18

Abstract: A fluid ejection system may include a media transport assembly and a printhead assembly having a fluid ejection device opposite the media transport assembly. The fluid ejection device may include a drop ejecting element and a fluid ejection chamber containing the drop ejection element. The fluid ejection chamber has an inlet and an outlet for fluid circulation through the fluid ejection chamber across the drop ejecting element. A particle tolerant architecture is between the inlet and the drop ejecting element.

公开(公告)号：US10646868B2

公开(公告)日：2020-05-12

申请号：US16079496

申请日：2016-04-28

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

Inventor： Erik D. Torniainen ,  Nick McGuinness ,  David P. Markel ,  Alexander Govyadinov

IPC: B01J3/00 ,  B01L3/00 ,  G01N15/02 ,  G01N15/00

Abstract: In an example implementation, a method of microfluidic filtering includes activating a first fluid pump within a microfluidic channel to cause a forward flow of fluid through the microfluidic channel and through a filter of a filter loop. The filter loop intersects the microfluidic channel at a loop entry and at a loop exit. The method includes activating a second fluid pump to cause a reverse flow of fluid through the filter.

公开(公告)号：US20190054469A1

公开(公告)日：2019-02-21

申请号：US16079496

申请日：2016-04-28

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

Inventor： Erik D. Torniainen ,  Nick McGuinness ,  David P. Markel ,  Alexander Govyadinov

IPC: B01L3/00 ,  G01N15/02

Abstract: In an example implementation, a method of microfluidic filtering includes activating a first fluid pump within a microfluidic channel to cause a forward flow of fluid through the microfluidic channel and through a filter of a filter loop. The filter loop intersects the microfluidic channel at a loop entry and at a loop exit. The method includes activating a second fluid pump to cause a reverse flow of fluid through the filter.

公开(公告)号：US20190023022A1

公开(公告)日：2019-01-24

申请号：US16141907

申请日：2018-09-25

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

Inventor： Nick McGuinness ,  Lawrence H. White ,  Paul A. Richards

IPC: B41J2/19 ,  B41J2/18 ,  B41J2/175 ,  B41J2/14

Abstract: A fluid ejection device includes a fluid slot, a fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the fluid ejection chamber, a fluid circulation channel communicated at a first end with the fluid slot and communicated at a second end with the fluid ejection chamber, and a particle tolerant architecture within the fluid circulation channel at the second end.