公开(公告)号：US20210146682A1

公开(公告)日：2021-05-20

申请号：US16616919

申请日：2017-07-17

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

Inventor： Sara MOLINS CABANI ,  Jordi HERNANDEZ CREUS ,  Diana CANTO ESTANY

IPC: B41J2/045 ,  B41J2/165

Abstract: Example systems to determine print fluid ejection nozzle health for a printer device are disclosed along with corresponding methods. In an example, the system includes an image recording device to record an image of print fluid ejected from a print fluid ejection nozzle and disposed on a printable surface. In addition, the system includes an image processor to analyse the image to provide a result based on a characteristic of the image that are representative of the print fluid disposed on the printable surface. Further, the system includes a controller to receive the result and assign a nozzle health category to the print fluid ejection nozzle in dependence on the result.

公开(公告)号：US20210237436A1

公开(公告)日：2021-08-05

申请号：US17049090

申请日：2018-08-30

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

Inventor： Ricard SILVESTRE RIVERO ,  Jordi HERNANDEZ CREUS ,  Mauricio SERAS FRANZOSO

IPC: B41J2/045 ,  B41J2/125 ,  B41J2/175 ,  B41J2/195 ,  B41J2/21

Abstract: A system comprises a printhead including a nozzle, a temperature sensor and a processor. The temperature sensor detects the temperature of a location of a print surface upon firing the nozzle to eject a drop of printing fluid to the location of the print surface. The processor determines whether the nozzle ejected the drop properly using the detected temperature.