公开(公告)号：US09921511B2

公开(公告)日：2018-03-20

申请号：US15122380

申请日：2014-04-28

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Doris Chun ,  Sivapackia Ganapathiappan ,  Hou T. Ng ,  Albert Teishev

IPC: G03G9/13 ,  C09D11/037 ,  G03G9/08 ,  G03G9/12 ,  G03G9/125

CPC classification number: G03G9/131 ,  C09D11/037 ,  G03G9/0804 ,  G03G9/122 ,  G03G9/125

Abstract: In an example of a method for making polymer-encapsulated metallic ink pigment particles, a layer of a transparent resin dispersion is disposed on a flexible substrate. The resin dispersion layer is substantially dried, and a base resin layer is formed. A slurry is disposed onto the base resin layer. The slurry includes metallic pigment particles and polymer particles dispersed in a non-aqueous carrier. The slurry is dried to form a metallic pigment-polymer sheet. Another layer of the transparent resin dispersion is disposed on the metallic pigment-polymer sheet and is dried. A coating resin layer is formed. The metallic pigment-polymer sheet and the base and coating transparent resin layers form a tri-layer film having the metallic pigment particles encapsulated between the base and coating transparent resin layers.

公开(公告)号：US20170361505A1

公开(公告)日：2017-12-21

申请号：US15513965

申请日：2014-09-26

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

Inventor： James Elmer Abbott, JR. ,  Alexander Govyadinov ,  Vladek Kasperchik ,  Krzysztof Nauka ,  Sivapackia Ganapathiappan ,  Lihua Zhao ,  Howard S. Tom, JR. ,  Yan Zhao ,  Hou T. Ng

IPC: B29C35/08 ,  B29C67/00 ,  B29C64/165 ,  B29C64/205 ,  B29C64/386 ,  B33Y10/00

CPC classification number: B29C35/0805 ,  B29C64/165 ,  B29C64/205 ,  B29C64/291 ,  B29C64/386 ,  B29C67/0007 ,  B29C2035/0838 ,  B33Y10/00 ,  B33Y30/00

Abstract: In one example, a lighting device for an additive manufacturing machine includes an array of light sources each to emit monochromatic light within a band of wavelengths that includes a peak light absorption of a liquid coalescing agent to be dispensed on to a build material.

公开(公告)号：US20170247555A1

公开(公告)日：2017-08-31

申请号：US15509774

申请日：2014-09-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Elias I. Franses ,  David S. Corti ,  Yung-Jih Yang ,  Hou T. Ng ,  Yan Zhao ,  Howard S. Tom

IPC: C09D11/322 ,  B41J2/01 ,  C09D11/38 ,  C09D11/037 ,  C09D11/033

Abstract: Provided in one example herein is an aqueous ink composition, comprising: pigment particles comprising at least one metal oxide; an aqueous medium; and a cationic double-chain surfactant comprising a quaternary ammonium salt. Methods of making and using the ink composition are also provided.

公开(公告)号：US20170225396A1

公开(公告)日：2017-08-10

申请号：US15121730

申请日：2014-04-30

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

Inventor： Howard S. Tom ,  Hou T. Ng ,  Lihua Zhao ,  Sivapackia Ganapathiappan ,  Krzysztof Nauka ,  Yan Zhao

IPC: B29C67/00 ,  B33Y70/00 ,  B33Y10/00

CPC classification number: B29C64/165 ,  B29K2105/0005 ,  B29K2105/0011 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

Abstract: In a 3D printing method, a sinterable material is applied and heated to a temperature ranging from about 50° C. to about 400° C. A coalescent agent is selectively applied on a portion of the sinterable material, and a modifying agent is selectively applied on the portion and/or on another portion of the sinterable material. The modifying agent consists of an inorganic salt, a surfactant, a co-solvent, a humectant, a biocide, and water. The sinterable material is exposed to radiation, whereby the coalescent agent at least partially cures the portion of the sinterable material in contact with the coalescent agent, and the modifying agent i) reduces curing of the portion of the sinterable material in contact with both the coalescent agent and the modifying agent ii) prevents curing of the other portion of the sinterable material in contact with the modifying agent, or iii) both i and ii.

公开(公告)号：US11104816B2

公开(公告)日：2021-08-31

申请号：US16936978

申请日：2020-07-23

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

Inventor： Sivapackia Ganapathiappan ,  Howard S. Tom ,  Lihua Zhao ,  Krzysztof Nauka ,  Yan Zhao ,  Hou T. Ng

IPC: C09D11/033 ,  B33Y70/00 ,  B33Y10/00 ,  B29C64/165 ,  C09D11/322 ,  C09D11/328 ,  C09D11/037 ,  C09D11/102 ,  B29K105/00

Abstract: The present disclosure is drawn to material sets for 3D printing and methods of 3D printing. The material set can include a coalescent an organic-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also include water and an organic co-solvent. The material set can also include a particulate polymer formulated to coalesce when contacted by the coalescent ink and irradiated by a near-infrared energy having the peak absorption wavelength.

公开(公告)号：US20190134898A1

公开(公告)日：2019-05-09

申请号：US16098082

申请日：2016-07-27

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

Inventor： Yan Zhao ,  Kristopher J. Erickson ,  Aja Hartman ,  Lihua Zhao ,  Sterling Chaffins ,  Kevin P. DeKam

IPC: B29C64/165 ,  B29C64/112 ,  B29C64/393 ,  B29C64/20 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/00

Abstract: In an example method for forming three-dimensional (3D) printed electronic parts, a build material is applied. An electronic agent is selectively applied in a plurality of passes on a portion of the build material. A fusing agent is also selectively applied on the portion of the build material. The build material is exposed to radiation in a plurality of heating events. During at least one of the plurality of heating events, the portion of the build material in contact with the fusing agent fuses to form a region of a layer. The region of the layer exhibits an electronic property. An order of the plurality of passes, the selective application of the fusing agent, and the plurality of heating events is controlled to control a mechanical property of the layer and the electronic property of the region.

公开(公告)号：US20180065297A1

公开(公告)日：2018-03-08

申请号：US15560422

申请日：2015-05-15

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/165 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/165 ,  B29C64/386 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: In some examples, at least one agent distributor may be to selectively deliver mixtures of coalescing agent and carrier onto portions of a layer of build material at variable coalescing agent concentrations and variable contone densities. A controller may be to control the at least one agent distributor to selectively deliver the mixture to a portion of the layer at a selected coalescing agent concentration and a selected contone density.

公开(公告)号：US20180001550A1

公开(公告)日：2018-01-04

申请号：US15545956

申请日：2015-04-30

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/153 ,  B33Y10/00 ,  B29C64/124 ,  B33Y30/00

Abstract: In an example implementation, a method of printing a multi-structured three-dimensional (3D) object includes forming a layer of sinterable material. The method includes processing a first portion of the sinterable material using first set of processing parameters and processing a second portion of the sinterable material using a second set of processing parameters. The processed first and second portions form, respectively, parts of a first and second structure of a multi-structured 3D object.

公开(公告)号：US20160221836A1

公开(公告)日：2016-08-04

申请号：US14908009

申请日：2013-09-27

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

Inventor： Yan Zhao ,  Howard S. Tom ,  Hou T. Ng

IPC: C01G23/053 ,  C09D11/322 ,  C09D17/00

CPC classification number: C01G23/053 ,  C01G23/0532 ,  C01P2004/01 ,  C01P2004/34 ,  C01P2004/62 ,  C01P2006/11 ,  C08K2003/2241 ,  C09C1/00 ,  C09C1/3676 ,  C09D5/028 ,  C09D7/61 ,  C09D11/023 ,  C09D11/102 ,  C09D11/322 ,  C09D17/00 ,  C09D17/008

Abstract: A white pigment dispersion includes 10 to 60 wt % of low effective density TiO2, 1 to 40 wt % of a latex, and the balance a dispersing medium. Inks using the low effective density TiO2 and methods for preparing the low effective density TiO2 are also disclosed.

Abstract translation: 白色颜料分散体包含10至60重量％的低有效密度TiO 2，1至40重量％的胶乳，余量为分散介质。 还公开了使用低有效密度TiO 2的油墨和用于制备低有效密度TiO 2的方法。

公开(公告)号：US11383432B2

公开(公告)日：2022-07-12

申请号：US17031526

申请日：2020-09-24

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/153 ,  B33Y30/00 ,  B33Y10/00 ,  B29C64/165 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/291 ,  B22F10/20 ,  B22F10/30 ,  B22F10/36 ,  B22F10/14 ,  B22F10/38 ,  B22F10/28 ,  B22F10/366 ,  B22F10/10 ,  B29C64/124

Abstract: In an example implementation, a method of printing a multi-structured three-dimensional (3D) object includes forming a layer of sinterable material. The method includes processing a first portion of the sinterable material using a first set of processing parameters and processing a second portion of the sinterable material using a second set of processing parameters. The processed first and second portions form, respectively, parts of a first and second structure of a multi-structured 3D object.