公开(公告)号：US20230202188A1

公开(公告)日：2023-06-29

申请号：US17996590

申请日：2020-04-20

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

Inventor： Dorkaitz Alain VAZQUEZ FERNANDEZ ,  David BUTINYA TEIXIDO ,  Albert CRESPI SERRANO ,  Miquel BOLEDA BUSQUETS

IPC: B41J2/175

CPC classification number: B41J2/17596 ,  B41J2/17513 ,  B41J2002/17516

Abstract: The present disclosure refers to a method of monitoring a fluid supply system, the system including a collapsible fluid reservoir to contain a supply of fluid and an outer container to enclose the collapsible fluid reservoir and to receive pressurized gas that pressurizes the supply of fluid, the method comprising a controller to: control a gas pressure pump to feed the fluid to or from the fluid reservoir, the gas pressure pump operating in pressurization cycles; monitor a parameter of the pressurization cycles; and determine a fill state of the fluid reservoir as a function of the monitored parameter.

公开(公告)号：US20190337294A1

公开(公告)日：2019-11-07

申请号：US16470940

申请日：2017-04-19

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

Inventor： David BUTINYA ,  Marta COMA VIVES ,  Albert CRESPI SERRANO ,  Joan-Albert MIRAVET JIMENEZ

IPC: B41J2/175 ,  G01L19/00 ,  G01L9/00 ,  G01L7/08

Abstract: A differential pressure sensor is used for measuring or identifying a pressure difference, for example to determine a movement or speed of fluid in a fluid conduit or printer re-circulation conduit. The differential pressure sensor determines the difference between an air pressure and a fluid pressure, wherein the fluid is moving in a flow channel. The flow channel includes a surface conveying a fluid between a first port and second port. An opening in the surface of the flow channel provides a fluid communication between the differential pressure sensor and fluid. Moreover, the sensor is arranged in air communication with the pressure box, such as to allow the differential pressure sensor to identify the pressure difference between the air pressure in the pressure box and the fluid pressure in the flow channel.

公开(公告)号：US20210213754A1

公开(公告)日：2021-07-15

申请号：US17052094

申请日：2018-08-13

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

Inventor： David BUTINYA TEIXIDO ,  Albert CRESPI SERRANO ,  Marta COMA VIVES

IPC: B41J2/18

Abstract: An example printing fluid circulation circuit for a printing system comprises a first circuit port to supply printing fluid to, or receive printing fluid from, a first fluid port of a printhead and a second circuit port to supply printing fluid to, or receive printing fluid from, a second fluid port of a printhead. The printing fluid circulation circuit is to operate in a first mode to concurrently supply printing fluid from the first reservoir to the first circuit port and from the second circuit port to a second reservoir, and in a second mode to concurrently supply printing fluid from the first reservoir to the second circuit port and from the first circuit port to the second reservoir.

公开(公告)号：US20210206174A1

公开(公告)日：2021-07-08

申请号：US16089514

申请日：2017-03-28

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

Inventor： Oriol PARERA FIESTAS ,  Tuomo Eljas KAIKKONEN ,  Albert CRESPI SERRANO

IPC: B41J2/175

Abstract: Operating a fluid delivering system in a printer, wherein the fluid delivering system comprises a fluid supply including a fluid bag which contains a fluid to be delivered to a fluid delivering tube connected to a printhead, and a closed pressurizing volume which surrounds the fluid bag to expel fluid from the fluid bag to the fluid delivering tube when applying pressure from a pressurizing system to the pressurizing volume, wherein pressure in the pressurizing system relative to atmosphere is measured by a first sensor, and wherein a second sensor provides an output signal which indicates a pressure difference between the pressurizing system and the fluid delivering tube, comprising disconnecting the pressurizing volume of the fluid supply from the pressurizing system, providing a connection of the pressurizing volume to atmosphere to transmit atmospheric pressure to the fluid, generating pressure in the pressurizing system, performing measurements of the pressure in the pressurizing system relative to atmosphere by the first sensor, and calibrating the second sensor by the measurements of the first sensor.

公开(公告)号：US20230286285A1

公开(公告)日：2023-09-14

申请号：US18006084

申请日：2020-07-20

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

Inventor： Dorkaitz Alain VAZQUEZ FERNANDEZ ,  Alvin Zheng-Hui YU ,  Joan-Albert MIRAVET JIMENEZ ,  Albert CRESPI SERRANO

IPC: B41J2/175 ,  B41J2/17

CPC classification number: B41J2/17596 ,  B41J2/1707

Abstract: A printing fluid delivery system comprising a fluid pump having an inlet and an outlet, a valve connected to the outlet of the fluid pump, and a controller to close the valve while the fluid pump is driven to increase the pressure at the outlet of the fluid pump based on a service condition and to open the valve based on a predefined relief condition to relieve the pressure at the outlet of the fluid pump.

公开(公告)号：US20230123332A1

公开(公告)日：2023-04-20

申请号：US18067143

申请日：2022-12-16

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

Inventor： David BUTINYA TEIXIDO ,  Albert CRESPI SERRANO ,  Marta COMA VIVES

IPC: B41J2/18

Abstract: An example printing fluid circulation system includes a first circuit to circulate a printing fluid through a printhead in a first direction and a second circuit to circulate the printing fluid through the printhead in a second direction opposite to the first direction. The first circuit is activated during a first mode to circulate the printing fluid from a first reservoir to a second reservoir. The second circuit is activated during a second mode different from the first mode to circulate the printing fluid from the first reservoir to the second reservoir.