公开(公告)号：US20230285964A1

公开(公告)日：2023-09-14

申请号：US17691214

申请日：2022-03-10

Applicant: Hewlett-Packard Development Company L.P.

Inventor： David OLSEN ,  Si-lam J. CHOY ,  Paul Mark HAINES ,  Justin M. ROMAN

IPC: B01L3/00

CPC classification number: B01L3/502746 ,  B01L2300/048 ,  B01L2400/0605 ,  B01L2400/0622 ,  B01L2400/082 ,  B01L2400/0487

Abstract: A metered volume microfluidic device can include fluid flow microfluidics. The fluid flow microfluidics can include an inflow channel, a metered volume chamber positioned to receive working fluid from the inflow channel, a metered volume outflow channel positioned to receive and direct a metered volume of the working fluid when discharged from the metered volume chamber, and a capillary check valve. The capillary check valve can allow excess working fluid to exit the metered volume chamber when filling the metered volume chamber via the inflow channel. The capillary check valve can also prevent excess working fluid that has passed there through from being reintroduced into the metered volume chamber when the working fluid is discharged into the metered volume outflow channel.

公开(公告)号：US20210206092A1

公开(公告)日：2021-07-08

申请号：US16075632

申请日：2017-04-24

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

Inventor： Michael DUDA ,  Justin M. ROMAN ,  Joel V. PICKARD

IPC: B29C64/35 ,  B33Y40/20 ,  B33Y30/00 ,  B22F10/68 ,  B28B11/22 ,  B08B7/02

Abstract: A three-dimensional (3D) printer and method of additive manufacture are disclosed. The method includes building a three-dimensional (3D) object via a 3D printing process. After the 3D printing process, the 3D object is contained within a cake comprising the 3D object and partially fused excess build material. The method further includes vibrating the cake to loosen the excess build material. The frequency of the vibration is swept across a predetermined range of frequencies over a predetermined sweep interval.

公开(公告)号：US20210197471A1

公开(公告)日：2021-07-01

申请号：US16077057

申请日：2017-07-28

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

Inventor： Wesley R. SCHALK ,  Kris M. ENGLISH ,  Justin M. ROMAN ,  Kevin E. SWIER ,  David R. OTIS, Jr.

IPC: B29C64/321 ,  B29C64/259 ,  B29C64/357 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00

Abstract: A 3D printer and method include a cartridge receiver to hold a material cartridge that accepts build material into the material cartridge from the 3D printer and makes build material available from the material cartridge. A first conveying system of the 3D printer transports build material for the 3D printing. A second conveying system of the 3D printer facilitates recovery of excess build material from the 3D printing.