公开(公告)号：US20180011475A1

公开(公告)日：2018-01-11

申请号：US15539973

申请日：2015-01-30

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

Inventor： David H. Donovan ,  Jacob T. Wright ,  Erica M. Fung

IPC: G05B19/4099

CPC classification number: G05B19/4099 ,  B22F3/008 ,  B22F2003/1057 ,  B29C64/112 ,  B29C64/386 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  G05B2219/49023 ,  H04N1/405 ,  Y02P10/295

Abstract: Adjustment of a halftoning threshold can, in an example implementation, include assigning a relative energy value, relative to a reference energy value, to a location of a build area and adjusting a halftoning threshold based on the relative energy value.

公开(公告)号：US20190351608A1

公开(公告)日：2019-11-21

申请号：US16526076

申请日：2019-07-30

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

Inventor： Bernardo A. Gutierrez ,  Jacob T. Wright ,  Michael A. Novick

IPC: B29C64/10 ,  B29C64/165 ,  B29C64/386 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00

Abstract: At least one agent distributor may be to selectively deliver coalescing agent onto portions of a layer of build material at a first density and at a second density lower than the first density. A controller may be to control the at least one agent distributor to selectively deliver the coalescing agent at the first and second densities onto respective first and second portions of the layer in respective first and second patterns derived from data representing the three-dimensional object to be generated, so that when energy is applied to the layer the build material may coalesce and solidify to form a slice of the three-dimensional object in accordance with the first pattern. The second portion may be in proximity to a boundary of the first portion. Presence of the coalescing agent in the second portion may be to prevent at least some heat from flowing away from the first portion when the energy is applied.

公开(公告)号：US11097472B2

公开(公告)日：2021-08-24

申请号：US16526076

申请日：2019-07-30

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

Inventor： Bernardo A. Gutierrez ,  Jacob T. Wright ,  Michael A. Novick

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00 ,  B29C64/10

Abstract: At least one agent distributor may be to selectively deliver coalescing agent onto portions of a layer of build material at a first density and at a second density lower than the first density. A controller may be to control the at least one agent distributor to selectively deliver the coalescing agent at the first and second densities onto respective first and second portions of the layer in respective first and second patterns derived from data representing the three-dimensional object to be generated, so that when energy is applied to the layer the build material may coalesce and solidify to form a slice of the three-dimensional object in accordance with the first pattern. The second portion may be in proximity to a boundary of the first portion. Presence of the coalescing agent in the second portion may be to prevent at least some heat from flowing away from the first portion when the energy is applied.

公开(公告)号：US10406744B2

公开(公告)日：2019-09-10

申请号：US15545143

申请日：2015-03-05

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

Inventor： Bernardo A. Gutierrez ,  Jacob T. Wright ,  Michael A. Novick

IPC: B29C64/10 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00 ,  B29C64/386 ,  B29C64/165

Abstract: At least one agent distributor may be to selectively deliver coalescing agent onto portions of a layer of build material at a first density and at a second density lower than the first density. A controller may be to control the at least one agent distributor to selectively deliver the coalescing agent at the first and second densities onto respective first and second portions of the layer in respective first and second patterns derived from data representing the three-dimensional object to be generated, so that when energy is applied to the layer the build material may coalesce and solidify to form a slice of the three-dimensional object in accordance with the first pattern. The second portion may be in proximity to a boundary of the first portion. Presence of the coalescing agent in the second portion may be to prevent at least some heat from flowing away from the first portion when the energy is applied.

公开(公告)号：US20180009157A1

公开(公告)日：2018-01-11

申请号：US15545143

申请日：2015-03-05

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

Inventor： Bernardo A. Gutierrez ,  Jacob T. Wright ,  Michael A. Novick

IPC: B29C64/10 ,  B33Y50/02 ,  B33Y10/00

CPC classification number: B29C64/10 ,  B29C64/165 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: At least one agent distributor may be to selectively deliver coalescing agent onto portions of a layer of build material at a first density and at a second density lower than the first density. A controller may be to control the at least one agent distributor to selectively deliver the coalescing agent at the first and second densities onto respective first and second portions of the layer in respective first and second patterns derived from data representing the three-dimensional object to be generated, so that when energy is applied to the layer the build material may coalesce and solidify to form a slice of the three-dimensional object in accordance with the first pattern. The second portion may be in proximity to a boundary of the first portion. Presence of the coalescing agent in the second portion may be to prevent at least some heat from flowing away from the first portion when the energy is applied.