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：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：US20230136963A1

公开(公告)日：2023-05-04

申请号：US17995721

申请日：2020-04-09

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

Inventor： David BUTINYA TEIXIDO ,  Dorkaitz Alain VAZQUEZ FERNANDEZ ,  Josep ORTIZ MOMPEL

IPC: B41J2/18 ,  B41J2/175

Abstract: Examples relate to a method to recirculate print agent in a printing system. The method comprises detecting a recirculation device comprising a check valve and detecting a printhead connected in parallel to the detected recirculation device. The method further comprises selecting a printhead circulation mode to circulate print agent through the detected printhead and selecting a recirculation device circulation mode to circulate print agent through the detected recirculation device.

公开(公告)号：US20240059069A1

公开(公告)日：2024-02-22

申请号：US18260284

申请日：2021-02-05

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

Inventor： David BUTINYA TEIXIDO

IPC: B41J2/175

CPC classification number: B41J2/175

Abstract: According to an example, a method to determine a printing fluid pressure in a printing fluid delivery system comprises: determining that a pressure difference measured by a fluid pressure sensor of the printing fluid delivery system is outside a dynamic range of the pressure sensor, controlling a fluid supply system of the printing fluid delivery system to increase a fluid pressure to an augmented fluid pressure in which the pressure difference is within the dynamic range of the pressure sensor, determining a fluid pressure value on the fluid pressure sensor, and calculating the printing fluid pressure as a function of the pressure difference and the augmented fluid pressure.

公开(公告)号：US20230373222A1

公开(公告)日：2023-11-23

申请号：US18031134

申请日：2020-10-15

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

Inventor： Mauricio SERAS FRANZOSO ,  Dorkaitz Alain VAZQUEZ FERNANDEZ ,  David BUTINYA TEIXIDO

IPC: B41J2/18 ,  B41J2/17 ,  B41J2/175

CPC classification number: B41J2/18 ,  B41J2/1707 ,  B41J2/17556

Abstract: Examples in accordance with the present disclosure are directed to a method including generating a negative fluid pressure between a fluid supply and a first port of a fluidic ejection device, and generating a positive fluid pressure between the fluid supply and a second port of the fluidic ejection device. The method further includes selectively activating a first priming pump connected to the first port in response to an indication that the first port is transitioning from an open state to a closed state, wherein the selective activation of the first priming pump causes the first port to remain in the open state and causes fluid within the fluidic ejection device to exit through the first port and to recirculate along a fluid flow path.

公开(公告)号：US20230138198A1

公开(公告)日：2023-05-04

申请号：US17995719

申请日：2020-04-09

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

Inventor： David BUTINYA TEIXIDO

IPC: B41J2/18

Abstract: According to an example, a recirculation device having a fluid interconnect assembly comprises an open state and a closed state. The fluid interconnect assembly may comprise an elastic element, a first hollow element, a second hollow element, and a seal movable along the fluid interconnect assembly. The first hollow element and the second hollow element comprise an opening, wherein the hollows element are fluidly connected. In the open state of the device, the first hollow element opening and the second hollow element opening protrude from the seal so that the openings are unsealed. In the closed state of the device, the seal seals the first hollow element opening and the second hollow element opening, being the seal biased towards the closed state by the elastic element.

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.