公开(公告)号：US20210197468A1

公开(公告)日：2021-07-01

申请号：US16075219

申请日：2017-04-20

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

Inventor： Kenneth WILLIAMS ,  Brent EWALD

IPC: B29C64/314 ,  B29C64/295 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  H05B3/22 ,  H05B3/00

Abstract: In some examples, preheat three-dimensional (3D) printer build material can include a heating plate of a 3D printer to preheat build material from below the build material, where the heating plate is located adjacent to a build platform of the 3D printer, and a heater-spreader carriage of the 3D printer to preheat the build material from above the build material and spread the preheated build material from the heating plate to the build platform.