公开(公告)号：US20210023785A1

公开(公告)日：2021-01-28

申请号：US16607739

申请日：2018-04-06

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

Inventor： Luke Sosnowski ,  Justin M. Roman ,  David R. Otis, JR. ,  Terry Lambright

IPC: B29C64/255 ,  B29C64/364 ,  B29C64/314

Abstract: Techniques for controlling moisture content of build material in a three-dimensional printer are provided. The system includes a vessel to supply the build material into a build material conveying system. The vessel includes an air inlet to receive a flow of air to fluidize the build material. The system also includes an air conditioner to control the humidity of the air and provide a controlled level of moisture content to the build material.

公开(公告)号：US20180186150A1

公开(公告)日：2018-07-05

申请号：US15896292

申请日：2018-02-14

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

Inventor： Jeffrey A. Nielsen ,  Craig Olbrich ,  Richard W. Seaver ,  David R. Otis, JR.

IPC: B41J2/14 ,  B41J2/16

CPC classification number: B41J2/1404 ,  B41J2/14 ,  B41J2/14201 ,  B41J2/16 ,  B41J2/1603 ,  B41J2/1607 ,  B41J2/1626 ,  B41J2/1631 ,  B41J2/1639 ,  B41J2/1645 ,  B41J2202/11

Abstract: An inkjet material dispenser system includes a printhead member. According to one exemplary embodiment, the printhead member includes at least one drop ejector including an insulating stack layer and a top orifice surface defining an orifice, wherein a ratio of a diameter of the orifice to a height of the insulating stack layer (O/L ratio) is at least 1.0.

公开(公告)号：US20210283846A1

公开(公告)日：2021-09-16

申请号：US16608853

申请日：2017-12-21

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

Inventor： David R. Otis, JR. ,  Steve Ringwald ,  Kevin E. Swier

IPC: B29C64/357 ,  B29C64/255 ,  B29C64/393 ,  B29C64/329 ,  B22F12/52 ,  B22F12/90 ,  B22F10/73 ,  B22F10/85 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

Abstract: A build device and a method of operating the build device are disclosed. In a method provided, a build material is directed to an intermediate vessel from a conveying line. The build material is separated from an air stream and dropped into the intermediate vessel. The intermediate vessel is emptied between a first build operation and a second build operation.

公开(公告)号：US20210276260A1

公开(公告)日：2021-09-09

申请号：US16608854

申请日：2017-11-30

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

Inventor： David R. Otis, JR. ,  Kevin E. Swier ,  Adam Peter Franks

IPC: B29C64/336 ,  B29C64/153 ,  B29C64/357 ,  B33Y10/00 ,  B33Y30/00

Abstract: A varying a composition of build material used for a three dimensional (3D) part formed by a 3D printer are disclosed. In a system provided, a number of vessels for build material are included, wherein each vessel includes a feeder coupled to a conveying system. The conveying system conveys and blends build material from the vessels. A controller is configured to adjust a composition of the build material by adjusting an amount of material added from each of the vessels by controlling the feeder on each of the vessels.

公开(公告)号：US20200269512A1

公开(公告)日：2020-08-27

申请号：US16608852

申请日：2017-10-20

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

Inventor： Terry Lambright ,  David R. Otis, JR.

IPC: B29C64/393 ,  B29C64/321 ,  B29C64/153 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: According to examples, an apparatus may include a controller to identify a property of particulate material contained in a container and to determine, based upon the identified property of the particulate material, a parameter of a supply of gas fed into a conditioning assembly to condition the particulate material contained in the container. The controller may further control a mechanism to supply the gas at the determined parameter into the conditioning assembly.

公开(公告)号：US20200238617A1

公开(公告)日：2020-07-30

申请号：US16608912

申请日：2017-10-20

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

Inventor： Terry Lambright ,  David R. Otis, JR. ,  Kelly B. Smith

IPC: B29C64/255 ,  B33Y30/00 ,  B01F13/02 ,  B29C64/153 ,  B22F3/105

Abstract: According to examples, an apparatus may include a hopper having side walls, a bed positioned within the side walls, and a porous membrane supported above the bed. The porous membrane may have a plurality of pores having sizes that are between about 5 microns and about 15 microns and having a density of about 10 and about 30 percent of a material forming the porous membrane. A space between the bed and the porous membrane is to be pressurized with a gas and the gas is to flow through the porous membrane to fluidize particulate material provided on the porous membrane. The apparatus may also include a drain opening extending through the porous membrane and a drain aperture extending through the bed.

公开(公告)号：US20200016902A1

公开(公告)日：2020-01-16

申请号：US16580979

申请日：2019-09-24

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

Inventor： Kevin E. Swier ,  David R. Otis, JR.

IPC: B41J2/19 ,  B41J2/175

Abstract: In some examples, a method includes applying a negative pressure to a gas-filled volume through a vent. While a pressure in the volume decreases, the method draws a gas out through the vent and moves a liquid into the volume. The volume is filled with the liquid so that one side of the vent is covered with the liquid and the pressure in the volume increases up to a specified point.