公开(公告)号：US10960658B2

公开(公告)日：2021-03-30

申请号：US16094448

申请日：2016-07-11

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

Inventor： Daryl E. Anderson ,  James Michael Gardner ,  Michael W. Cumbie ,  Scott A. Linn ,  Berkeley Fisher

IPC: B41F31/02 ,  B41L27/04 ,  G01F23/24 ,  G01F23/26 ,  B41L39/02 ,  G01F23/22

Abstract: A method of detecting a level of printable fluid in a container includes, with at least one sensing location on a die in thermal contact with the printable fluid in the container, sensing a voltage of a capacitor over time as current from the capacitor leaks through a field effect transistor (FET). The FET and capacitor are associated with the sensing location. The method may further include, based on the voltage of the capacitor over time and a threshold voltage, determining whether the printable fluid is present at the at least one sensing location.

公开(公告)号：US10933648B2

公开(公告)日：2021-03-02

申请号：US16094101

申请日：2016-04-29

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

Inventor： Daryl E. Anderson ,  James Michael Gardner ,  Berkeley Fisher ,  Michael W. Cumbie

IPC: B41J29/38 ,  B41J2/175 ,  G01F23/24

Abstract: An example printing cartridge includes a fluid container, a plurality of sensing locations in thermal contact with the fluid container, a voltage comparator to output time-based information based on a comparison of a sensed voltage generated at a selected sensing location of the plurality of sensing locations to a threshold voltage, the time-based information representative of whether a fluid is present at a fluid level associated with the selected sensing location, and a counter to convert the time-based information to a digital code based on a number of clock cycles.

公开(公告)号：US10933640B2

公开(公告)日：2021-03-02

申请号：US16231057

申请日：2018-12-21

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

Inventor： Chien-Hua Chen ,  Michael W. Cumbie

IPC: B41J2/16 ,  B41J2/14 ,  B41J2/15 ,  B41J2/175 ,  B41J2/155

Abstract: A fluid dispenser may include fluid dispensing dies in an end-to-end staggered arrangement, a non-fluid dispensing die electronic device and a molding covering the fluid dispensing dies and the electronic device.

公开(公告)号：US20210039414A1

公开(公告)日：2021-02-11

申请号：US16608165

申请日：2018-04-13

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

Inventor： Jayprakash C. Bhatt ,  Michael W. Cumbie

IPC: B41M5/34 ,  B41M5/382

Abstract: An example of an imaging medium includes an image-receiving substrate, a donor ribbon attached to the image-receiving substrate, and a registration mark. The donor ribbon includes a donor ribbon substrate, a release layer disposed on the donor ribbon substrate, and a color-forming layer disposed on the release layer. The color-forming layer includes a repeated pattern. A repeat of the pattern includes at least three adjacent color-forming stripes including a cyan-forming stripe, a magenta-forming stripe, and a yellow-forming stripe, or a grid of four color-forming sections including i) a color-forming section selected from the group consisting of black-forming, cyan-forming, light cyan-forming, yellow-forming, magenta-forming, and light magenta-forming, ii) a cyan-forming section, iii) a magenta-forming section, and iv) a yellow-forming section. The color-forming layer is in contact with the image-receiving substrate.

公开(公告)号：US10894423B2

公开(公告)日：2021-01-19

申请号：US16502479

申请日：2019-07-03

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

Inventor： James Michael Gardner ,  Scott A. Linn ,  Stephen D. Panshin ,  Jefferson P. Ward ,  David Owen Roethig ,  David N. Olsen ,  Anthony D. Studer ,  Michael W. Cumbie ,  Sirena Chi Lu

IPC: G06F3/12 ,  B41J2/175

Abstract: A logic circuit for a replaceable print component is configured to, in response to a plurality of commands including a first command specifying the new I2C communications address and a first calibration parameter, a second command specifying the new I2C communications address and a second calibration parameter, a third command specifying the new I2C communications address and a class parameter, and/or fourth commands specifying the new I2C communications address and sub-class parameters, and at least one read request, generate count values in a count value range defined by a highest and lowest count value.

公开(公告)号：US20200282738A1

公开(公告)日：2020-09-10

申请号：US16493045

申请日：2017-11-27

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

Inventor： Chien-Hua Chen ,  Jeffrey R. Pollard ,  Michael W. Cumbie ,  Si-La in Choy

IPC: B41J2/18

Abstract: A die may, in an example, include at least one cross-die recirculation channel formed into the die to recirculate an amount of printing fluid therethrough, the cross-die recirculation channel including a first-sized inlet port and a first-sized outlet port formed on a first side of the die, at least one chamber recirculation channel formed into the die and fluidically coupled to the cross-die recirculation channel to recirculate an amount of printing fluid therethrough, the chamber recirculation channel including a second-sized inlet port and a second-sized outlet port, at least one pump formed within the chamber recirculation channel to recirculate the amount of printing fluid therethrough.

公开(公告)号：US10751997B2

公开(公告)日：2020-08-25

申请号：US16025218

申请日：2018-07-02

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

Inventor： Chien-Hua Chen ,  Michael G. Groh ,  Michael W. Cumbie

IPC: B41J2/14 ,  B41J2/16

Abstract: In some examples, a method of making a printhead flow structure includes bonding a flex circuit to a flexible carrier with a thermal release tape, placing a printhead die on the flexible carrier, and debonding the printhead flow structure including the flex circuit and the printhead die from the flexible carrier at a temperature below a release temperature of the thermal release tape by flexing the flexible carrier.

公开(公告)号：US20200224145A1

公开(公告)日：2020-07-16

申请号：US16605193

申请日：2017-09-23

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

Inventor： Viktor Shkolnikov ,  Diane R. Hammerstad ,  Michael W. Cumbie

IPC: C12M1/42 ,  C12M1/36 ,  C12N13/00 ,  C12N15/87 ,  C12M1/26

Abstract: An electroporation system may include a well plate, a dispenser and a dispenser-well positioning system. The well plate may include wells, each of the wells including an interior, a first electrode adjacent the interior and a second electrode adjacent the interior and spaced from the first electrode. The first electrode and the second electrode are to apply an electrostatic field across the well. The dispenser is to dispense a cell having a diameter into each of the wells. The dispenser-well positioning system is to align each well and the dispenser such that the dispenser dispenses the cell into each well at a location spaced from the first electrode and the second electrode by a distance of at least 5 times the diameter of the cell.

公开(公告)号：US10685898B2

公开(公告)日：2020-06-16

申请号：US16299538

申请日：2019-03-12

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

Inventor： Chien-Hua Chen ,  Michael W. Cumbie ,  Stephen Farrar

IPC: H01L21/56 ,  H01L23/31 ,  H01L23/00

Abstract: A circuit package comprises a circuit device in a first epoxy mold compound and a second epoxy mold compound of different compositions.

公开(公告)号：US10427406B2

公开(公告)日：2019-10-01

申请号：US15772344

申请日：2016-02-05

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

Inventor： Garrett E. Clark ,  Michael W. Cumbie ,  Jeremy Sells ,  Mark H. MacKenzie

IPC: B41J2/155 ,  B41J29/38 ,  B41J29/393 ,  B41J2/14 ,  B41J11/00 ,  B41J13/32 ,  B41J2/21

Abstract: The present disclosure includes a description of an example print bar that includes an ejection die disposed on a support element, and a sensor disposed at a particular location on the support element.