公开(公告)号：US20210031534A1

公开(公告)日：2021-02-04

申请号：US16978598

申请日：2018-03-08

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

Inventor： David Butinya ,  Joan Albert Miravet Jimenez ,  Marta Coma Vives

IPC: B41J2/175

Abstract: A device includes a fluid channel connecting a pair of ports and an attachment feature to attach the device at a dummy cartridge; wherein the pair of ports is dimensioned to mate with fluid feed ports of a printer when the device is attached to the dummy cartridge and the dummy cartridge is inserted in the printer.

公开(公告)号：US10899136B2

公开(公告)日：2021-01-26

申请号：US16335974

申请日：2017-01-24

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

Inventor： David Butinya ,  Marta Coma Vives ,  Joan-Albert Miravet

IPC: B41J2/175 ,  B41J2/18

Abstract: A printing device comprises a printing fluid supply; a plurality of printheads connected in parallel to the supply by a first flow path and a second flow path; a first fluid pressure source to create a negative fluid pressure between the supply and the first openings; a second fluid pressure source to create a positive fluid pressure between the supply and the second openings; and a controller. Each printhead comprises a closable first opening connected to the first flow path and a closable second opening connected to the second flow path, and has an associated mechanism to increase a fluid pressure in the printhead. Each first opening is to open in response to operation of the associated mechanism. The controller is to identify a first printhead for which printing fluid in the first printhead is to be recirculated; and operate the mechanism associated with the identified printhead.

公开(公告)号：US20200079099A1

公开(公告)日：2020-03-12

申请号：US16469575

申请日：2017-04-21

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

Inventor： David Butinya ,  Albert Crespi Serrano ,  Joan-Albert Miravet Jimenez

IPC: B41J2/175 ,  B41J2/18

Abstract: In an example, a printer controller is coupled to a fluid pump, a primer pump, and a pressure sensor of a printer, wherein a flow channel provides a fluid communication between the fluid pump and the printhead for enabling fluid recirculation in the printer. The printer controller: activates the fluid pump; activates the primer pump for a first predefined time interval; and identifies or determines a movement of fluid in the flow channel based on the fluid pressure measured by the pressure sensor.

公开(公告)号：US10562307B2

公开(公告)日：2020-02-18

申请号：US15763949

申请日：2016-01-29

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

Inventor： Marta Coma Vives ,  María Dinares Argemi ,  David Butinya ,  Macia Solé Pons

IPC: B41J25/316 ,  B41J2/165 ,  B41J2/21

Abstract: Example methods for the maintenance of printheads are provided, the printheads comprising a reservoir containing a printing fluid with particles in suspension, and a nozzle plate. Example methods may comprise capping the nozzle plate of the printhead, and rotating the capped printhead. Example maintenance devices for printheads are also provided, comprising a support with a socket to attach a printhead to the support, a drive unit to rotate the support about a rotation axis, and a control unit connected to the drive unit to perform a predetermined rotation cycle.