公开(公告)号：WO2019022740A1

公开(公告)日：2019-01-31

申请号：PCT/US2017/044093

申请日：2017-07-27

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

Inventor： LAWS, Alexander David ,  BOUCHER, Peter ,  KOEPL, Devin ,  KANG, Samantha ,  OPPENHEIMER, Charles Hugh ,  ROMAN, Justin M.

IPC: B29C64/307 ,  B29C64/20 ,  B29C64/141 ,  B33Y30/00 ,  B33Y40/00

Abstract: According to one aspect there is provided a build material processing apparatus for a 3D printing system. The system comprises a sieve to sieve build material, the sieve to receive a flow of build material, a vibrator mechanism to vibrate the sieve at a resonant frequency. A controller is provided to determine displacement characteristics of the sieve, determine, based on the displacement characteristics, a fill state of the sieve, and control a flow of build material to the sieve based on the determined fill state.

公开(公告)号：EP3658356A1

公开(公告)日：2020-06-03

申请号：EP17919498.0

申请日：2017-07-27

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

Inventor： LAWS, Alexander David ,  BOUCHER, Peter ,  KOEPL, Devin ,  KANG, Samantha ,  OPPENHEIMER, Charles Hugh ,  ROMAN, Justin M.

IPC: B29C64/307 ,  B29C64/20 ,  B29C64/141 ,  B33Y30/00 ,  B33Y40/00