公开(公告)号：US10850530B2

公开(公告)日：2020-12-01

申请号：US15748714

申请日：2015-10-27

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

Inventor： David Ridgway Otis, Jr. ,  Si-lam Julius Choy ,  Kevin Edward Swier ,  David N. Olsen

IPC: B41J2/19 ,  B41J2/165 ,  B41J2/175

Abstract: In one example, a liquid delivery and gas removal system for a printhead. The system includes a pump to provide a liquid at a positive pressure. The system also includes a filter fluidically coupled to the pump to receive the pressurized liquid at an upstream side, at a first pressure push the liquid through the filter to a downstream side, and at a higher second pressure push gas bubbles in the liquid through the filter to the downstream side. The system further includes a vent having a gas-permeable membrane. A wet side of the membrane is fluidically coupled to the downstream side and to a printhead. A vacuum is applied to a dry side of the membrane.

公开(公告)号：US20230182392A1

公开(公告)日：2023-06-15

申请号：US17926087

申请日：2020-10-24

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

Inventor： Michael Gabriel Monroe ,  Macia Sole Pons ,  Kevin Edward Swier

IPC: B29C64/321 ,  B29C64/214 ,  B29C64/393 ,  B33Y30/00 ,  B33Y40/00

CPC classification number: B29C64/321 ,  B29C64/214 ,  B29C64/393 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/153

Abstract: In one example, a device for dispensing build material powder in an additive manufacturing machine includes a first dispenser including a first scoop rotatable in a first direction to scoop build material powder into the first dispenser, a second dispenser including a second scoop rotatable in a second direction opposite the first direction to scoop build material powder into the second dispenser, and a leveler between the first dispenser and the second dispenser.