公开(公告)号：WO2019027431A1

公开(公告)日：2019-02-07

申请号：PCT/US2017/044739

申请日：2017-07-31

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

Inventor： WANG, Niicholas ,  CROCKETT, Michael ,  WINTERS, William ,  BARNES, Arthur H. ,  SCHALK, Wesley R. ,  ROMAN, Justin M.

IPC: B29C64/307 ,  B29C64/357 ,  B29C64/30 ,  B33Y40/00

Abstract: The technology described herein includes a spreader that creates scattered incidental particles in a build chamber when spreading build material is applied in the build platform. One or more vacuum sources create negative pressure zones in one or more receptacles to collect the incidental particles in the build chamber during printing process and thus minimize the scattering of the incidental particles.