公开(公告)号：US20210197455A1

公开(公告)日：2021-07-01

申请号：US16077752

申请日：2017-07-14

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

Inventor： Shannon Reuben WOODRUFF ,  Ali EMAMJOMEH ,  Yi FENG ,  Erica FUNG ,  Carolin FLEISCHMANN ,  Geoffrey SCHMID

IPC: B29C64/165 ,  B33Y70/00

Abstract: This disclosure relates to a method of 3-D printing comprising: applying a layer of build material onto a print platform, wherein the build material comprises particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group; printing a de-protecting agent at selected locations on the layer of build material; and coalescing particles of the polymer at the printed locations on the layer of build material to form a coalesced polymer layer.

公开(公告)号：US20210370602A1

公开(公告)日：2021-12-02

申请号：US17051133

申请日：2018-10-01

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

Inventor： Emily Ann MIGINNIS ,  Jesiska TANDY ,  Erica FUNG ,  Yow Wei CHENG

IPC: B29C64/314 ,  B29C64/357 ,  B29C64/393 ,  G06T7/00 ,  G06T7/80 ,  B33Y10/00 ,  B33Y50/02

Abstract: According to an example, an apparatus may include a processor and a non-transitory computer readable medium on which is stored machine readable instructions that are to cause the processor to determine an optical property value of a first build material from an image of a sample of the first build material, calculate an age of the first build material from the determined optical property value of the first build material, and based on the calculated age of the first build material, calculate a ratio of a mixture of the first build material and a second build material that results in the mixture achieving a selected feature, the second build material having a different age than the first build material.