公开(公告)号：US20210197470A1

公开(公告)日：2021-07-01

申请号：US16076122

申请日：2017-07-25

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

Inventor： Brent EWALD ,  John GEILE ,  Tristan DUDIK ,  Michael RODE

IPC: B29C64/321 ,  B33Y30/00 ,  B33Y40/00 ,  B22F12/52

Abstract: In order to have ensure a proper dosing of a 3D printing system, it is disclosed a feeding mechanism for feeding build material to a surface that comprises: a receptacle to receive build material; and an outlet of the build material having a substantially quadrilateral opening with a first dimension and a second dimension orthogonal to one another; the outlet further comprising a third dimension orthogonal to the first dimension and the second dimension defining the height of the outlet, and the feeding mechanism being to selectively feed build material from the receptacle through the outlet onto a surface as the feeding mechanism moves along a travel direction over the surface, being such travel direction parallel to the first dimension of the outlet, the feeding mechanism further comprising an actuator to modify the magnitude of at least one of the second dimension or the third dimension outlet.

公开(公告)号：US20210178689A1

公开(公告)日：2021-06-17

申请号：US16074404

申请日：2016-09-22

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

Inventor： Brent EWALD ,  Michael RODE

IPC: B29C64/329 ,  B33Y40/00 ,  B29C64/343 ,  G01F11/24

Abstract: In one example, a device to dispense a powder includes a hopper, an outlet from the hopper, a dispenser to dispense powdered build powder from the hopper through the outlet, and an agitator movable at the outlet intermittently at the urging of the dispenser.