公开(公告)号：US20220063189A1

公开(公告)日：2022-03-03

申请号：US17288550

申请日：2019-04-29

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

Inventor： Sterling Chaffins ,  Thomas A. Saksa ,  Kevin P. DeKam ,  Juan Sebastian Ramirez ,  Dale Peterson ,  Jami Ryan Barone

IPC: B29C64/165 ,  B29C64/295 ,  B29C64/268

Abstract: Methods and systems for making three-dimensional printed articles. In one example, a method of making a three-dimensional article can include printing a conductive element including a composite of a conductive material and a polymeric build material; printing an adjacent portion in contact with the conductive element, where the adjacent portion includes a nonconductive polymeric build material; and heating the conductive element by running an electric current through the conductive element, and thereby heating the adjacent portion to a temperature sufficient to change a physical property of the nonconductive polymeric build material of the adjacent portion.

公开(公告)号：US11199456B2

公开(公告)日：2021-12-14

申请号：US16324958

申请日：2016-10-25

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

Inventor： Kevin P DeKam ,  Timothy L Weber ,  Sterling Chaffins

IPC: G01K7/22 ,  B33Y10/00 ,  H01C7/02 ,  H01C17/065 ,  B33Y80/00 ,  B29C64/153 ,  G01K7/16 ,  B33Y70/00 ,  H01C3/12 ,  B22F7/08 ,  H01C1/14 ,  H01C7/00 ,  B29L31/34 ,  B22F10/20

Abstract: A temperature sensor can include a resistor, a first electrical contact at a first end of the resistor, a second electrical contact at a second end of the resistor, and a resistance measuring device. The resistor can be formed of a matrix of sintered elemental transition metal particles interlocked with a matrix of fused thermoplastic polymer particles. The resistance measuring device can be connected to the first electrical contact and the second electrical contact to measure a resistance of the resistor.

公开(公告)号：US20210282276A1

公开(公告)日：2021-09-09

申请号：US16491186

申请日：2017-12-15

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

Inventor： Sterling Chaffins ,  Kevin P. Dekam ,  Thomas A. Saksa ,  Juan Sebastian Ramirez

IPC: H05K3/46 ,  B29C64/188 ,  B29C64/165 ,  H05K3/12 ,  H05K1/03

Abstract: According to examples, a method of making a three-dimensional conductive printed part, including forming a layer of polymeric build material; selectively applying a fusing agent on a first selected area of the formed polymeric build material; selectively applying a conductive agent on a second selected area of the formed polymeric build material; and applying a solder receiving material to a portion of the first selected area and a portion of the second selected area; in which the solder receiving material is present on a surface of the conductive three-dimensional printed part is disclosed.

公开(公告)号：US20210107216A1

公开(公告)日：2021-04-15

申请号：US16603303

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Noemie Midrez ,  Garry Hinch

IPC: B29C64/165 ,  B29C64/291 ,  B33Y10/00 ,  B33Y70/00 ,  B22F10/14 ,  C09D11/102 ,  C09D11/101 ,  C09D11/38 ,  C09D11/54

Abstract: In an example of a method for three-dimensional (3D) printing, a build material composition is applied to form a build material layer. The build material composition includes a polymeric or polymeric composite build material, and a precipitating agent. Based on a 3D object model, a fusing agent is selectively applied on at least a portion of the build material composition. The fusing agent includes a radiation absorber, which the precipitating agent precipitates. The build material composition is exposed to radiation to fuse the at least the portion to form a layer of a 3D part.

公开(公告)号：US20210087418A1

公开(公告)日：2021-03-25

申请号：US16603342

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Garry Hinch

IPC: C09D11/38 ,  B33Y70/00 ,  B29C64/165 ,  C09D11/102

Abstract: An example of a build material composition for three-dimensional (3D) printing includes a polymeric or polymeric composite build material and a wetting modifying agent. The wetting modifying agent is: (i) incorporated into the polymeric component of the polymeric or polymeric composite build material and changes the wetting behavior of the polymeric component; or (ii) selected from the group consisting of: a fluorotelomer; a C8-C20 alcohol; a methyltrialkyl ammonium chloride; docusate sodium salt; a polymer having a chemical structure of the polymeric component of the polymeric or polymeric composite build material modified to include a hydrophobic group or a hydrophilic group; and a combination thereof.

公开(公告)号：US10926464B2

公开(公告)日：2021-02-23

申请号：US16064994

申请日：2016-04-15

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

Inventor： Sterling Chaffins ,  Kevin P. DeKam

IPC: B29C64/209 ,  B33Y70/00 ,  B33Y30/00 ,  B33Y80/00 ,  B29C64/165 ,  C09D11/54 ,  B29C64/264 ,  B22F3/00

Abstract: The present disclosure is drawn to material sets for 3-dimensional printing. The material set can include a thermoplastic polymer powder having an average particle size from 20 μm to 100 μm, a conductive fusing ink comprising a transition metal, and second fusing ink. The second fusing ink can include a fusing agent capable of absorbing electromagnetic radiation to produce heat. The second fusing ink can provide a lower conductivity than the conductive fusing ink when printed on the thermoplastic polymer powder.

公开(公告)号：US10294381B2

公开(公告)日：2019-05-21

申请号：US15308708

申请日：2014-06-04

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

Inventor： Sterling Chaffins ,  Kevin P. DeKam ,  Jayprakash C. Bhatt ,  Larrie Deardurff ,  Cory J. Ruud ,  Matthew Thornberry

IPC: B41J2/01 ,  C09D11/38 ,  C09D11/322

Abstract: The present disclosure is drawn to a pigment-based inkjet ink and methods. The inkjet ink includes water; from 2 wt % to 9 wt % pigment solids; from 0.05 wt % to 2 wt % of an acetylenic diol non-ionic surfactant; from 0.05 wt % to 2 wt % of a second surfactant. The second surfactant can be a polysorbate having at least 50% lipophilic oleic acid groups and having an HLB value of less than 15, or a C12-C18 polyoxyethylene glycol ether having an ethylene oxide number less than 20, or a perfluoropolyether including a polyethylene glycol primary alcohol or diol. The inkjet ink also includes from 5 wt % to 50 wt % of an organic solvent system comprising triethylene glycol and a cyclic amide.

公开(公告)号：US20190111676A1

公开(公告)日：2019-04-18

申请号：US16210143

申请日：2018-12-05

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

Inventor： Gerard Alzona ,  David Maxfield ,  Dustin W. Blair ,  Sterling Chaffins ,  Andrew L. Van Brocklin

IPC: B41J2/125 ,  B41J29/13 ,  B41J2/14 ,  B41J2/045

Abstract: In some examples, a controller receives impedance sensor values from an impedance sensor in a printhead, determines whether the impedance sensor values correlate to a production of an effective drive bubble for the printhead, and issues a command to modify a firing parameter for a fluid ejector of the printhead based on the impedance sensor values.

公开(公告)号：US20190037646A1

公开(公告)日：2019-01-31

申请号：US16073163

申请日：2016-06-17

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

Inventor： Sterling Chaffins ,  Cassady Sparks Roop ,  Kevin P. DeKam

IPC: H05B3/14 ,  B29C64/209 ,  B29C64/165

Abstract: According to an example, a three-dimensional (3D) printed heater may include a part body formed of fused thermoplastic polymer particles and an electrically resistive element formed of a matrix of conductive particles interspersed between a matrix of thermoplastic polymer particles. The conductive particles and the thermoplastic polymer particles may be provided at respective densities to cause the electrically resistive element to have a predetermined resistance level. The 3D printed heater may also include electrical contacts connected to the electrically resistive element, in which a current is to be applied through the electrically resistive element via the electrical contacts to cause the electrically resistive element to generate a predefined level of heat.

公开(公告)号：US20180273784A1

公开(公告)日：2018-09-27

申请号：US15994642

申请日：2018-05-31

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

Inventor： Larrie Deardurff ,  Jayprakash C. Bhatt ,  Cory J. Ruud ,  Sterling Chaffins ,  Matthew Thornberry

IPC: C09D11/322 ,  C09B67/22 ,  C09D11/102 ,  C09D11/38

CPC classification number: C09D11/322 ,  C09B67/0033 ,  C09B67/0041 ,  C09D11/102 ,  C09D11/38

Abstract: The present disclosure is drawn to a dispersed magenta pigment blend, including a first pigment including Pigment Violet 19 and Pigment Red 122, or Pigment Red 282; and a second pigment including Pigment Red 150. The weight ratio of the first pigment to the second pigment can be from 50:50 to 80:20 by pigment solids content.