公开(公告)号：US20190111676A1

公开(公告)日：2019-04-18

申请号：US16210143

申请日：2018-12-05

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

Inventor： Gerard Alzona ,  David Maxfield ,  Dustin W. Blair ,  Sterling Chaffins ,  Andrew L. Van Brocklin

IPC: B41J2/125 ,  B41J29/13 ,  B41J2/14 ,  B41J2/045

Abstract: In some examples, a controller receives impedance sensor values from an impedance sensor in a printhead, determines whether the impedance sensor values correlate to a production of an effective drive bubble for the printhead, and issues a command to modify a firing parameter for a fluid ejector of the printhead based on the impedance sensor values.

公开(公告)号：US10654268B2

公开(公告)日：2020-05-19

申请号：US16210143

申请日：2018-12-05

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

Inventor： Gerard Alzona ,  David Maxfield ,  Dustin W Blair ,  Sterling Chaffins ,  Andrew L Van Brocklin

IPC: B41J2/125 ,  B41J2/045 ,  B41J2/14 ,  B41J29/13 ,  G01N27/10 ,  B41J2/11

Abstract: In some examples, a controller receives impedance sensor values from an impedance sensor in a printhead, determines whether the impedance sensor values correlate to a production of an effective drive bubble for the printhead, and issues a command to modify a firing parameter for a fluid ejector of the printhead based on the impedance sensor values.

公开(公告)号：US10183488B2

公开(公告)日：2019-01-22

申请号：US15547393

申请日：2015-04-30

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

Inventor： Gerard Alzona ,  David Maxfield ,  Dustin W Blair ,  Sterling Chaffins ,  Andrew L Van Brocklin

IPC: B41J2/14 ,  B41J2/045 ,  B41J2/125 ,  B41J29/13 ,  G01N27/10 ,  B41J2/11

Abstract: In some examples, a printhead includes a firing chamber to receive printer fluid, an ejector positioned in the firing chamber to eject printer fluid droplets from the printhead, and a nozzle in fluid communication with the firing chamber. The printhead can further include an impedance sensor positioned in the firing chamber to contact printer fluid to measure impedance values of the printer fluid. The impedance sensor can be connectable to a controller to transmit impedance values of printer fluid to the controller.

公开(公告)号：US20180022091A1

公开(公告)日：2018-01-25

申请号：US15547393

申请日：2015-04-30

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

Inventor： Gerard Alzona ,  David Maxfield ,  Dustin W Blair ,  Sterling Chaffins ,  Andrew L Van Brocklin

IPC: B41J2/125 ,  B41J2/045 ,  B41J2/14

CPC classification number: B41J2/125 ,  B41J2/0451 ,  B41J2/04536 ,  B41J2/04555 ,  B41J2/0458 ,  B41J2/04581 ,  B41J2/11 ,  B41J2/14153 ,  B41J2/14201 ,  B41J29/13 ,  B41J2002/14354 ,  G01N27/10

Abstract: In some examples, a printhead includes a firing chamber to receive printer fluid, an ejector positioned in the firing chamber to eject printer fluid droplets from the printhead, and a nozzle in fluid communication with the firing chamber. The printhead can further include an impedance sensor positioned in the firing chamber to contact printer fluid to measure impedance values of the printer fluid. The impedance sensor can be connectable to a controller to transmit impedance values of printer fluid to the controller.