公开(公告)号：US20210276259A1

公开(公告)日：2021-09-09

申请号：US16607883

申请日：2018-04-07

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

Inventor： Justin M. Roman ,  Luke P. Sosnowski ,  David R. Otis

IPC: B29C64/321 ,  B29C64/314 ,  B29C64/343 ,  B29C64/393 ,  B29C64/153 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y50/02

Abstract: In one example, a pneumatic transport system to transport build material in an additive manufacturing machine includes a conduit, a source of air pressure to pull or push a stream of air through the conduit, a source of build material to introduce a build material into the stream of air, a separator to remove build material from the stream of air, a flow meter downstream from the separator to measure the stream of air flowing through the conduit, and a controller operatively connected to the flow meter and to the source of air pressure and/or the sources of build material to, based on a measurement from the flow meter, adjust a rate of flow of the stream of air in the conduit.

公开(公告)号：US20210362423A1

公开(公告)日：2021-11-25

申请号：US16607755

申请日：2018-07-31

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

Inventor： Justin M Roman ,  David R. Otis ,  John Geile ,  Luke P. Sosnowski

IPC: B29C64/364 ,  B29C64/314 ,  B29C64/321 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y50/02

Abstract: An example of an apparatus is provided. The apparatus includes a build material transport path to transport a build material with air flow. The apparatus includes a humidifying element to receive the air flow and to add moisture to the air flow. The apparatus includes an inlet to introduce ambient air into the build material transport path to decrease moisture content in the air flow. The apparatus includes a valve to connect the humidifying element and the inlet to the build material transport path. The valve is to adjust an amount of ambient air introduced into the build material transport path. The apparatus includes a sensor to detect the moisture content in the air flow and to generate a signal to indicate the moisture content. The apparatus includes a processor to receive the signal to control the valve to maintain a moisture content in the air flow.

公开(公告)号：US20170341410A1

公开(公告)日：2017-11-30

申请号：US15536211

申请日：2015-01-20

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

Inventor： David R. Otis ,  James R. Owen

IPC: B41J2/19 ,  B41J2/175 ,  B01D19/00

Abstract: In one example, a liquid-gas separator includes a composite membrane to pass a gas but not a liquid at a first pressure difference across the membrane and to block the gas passing back through the membrane at a second pressure difference smaller than the first pressure difference.