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1. (WO2018182791) THREE DIMENSIONAL PRINTING SYSTEM THAT AUTOMATICALLY REMOVES PARTICLES FROM BUILD PLANE

Pub. No.:    WO/2018/182791    International Application No.:    PCT/US2017/060639
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Nov 09 00:59:59 CET 2017
IPC: B29C 64/124
B33Y 30/00
Applicants: 3D SYSTEMS, INC.
Inventors: TANNER, Christopher
ENSLOW, Andrew
WYNNE, Ben
MUELLER, Robert
PINGEL, James
JOHNSON, Martin Alan
Title: THREE DIMENSIONAL PRINTING SYSTEM THAT AUTOMATICALLY REMOVES PARTICLES FROM BUILD PLANE
Abstract:
A three dimensional printing system includes a print engine (6), a fixture (40), and a controller (48). The print engine further includes a vessel (16), a light engine (24), and a movement mechanism (38). The vessel is for containing a photocurable resin and has a lower portion with a transparent sheet defining a lower surface of the vessel. The light engine is configured to project radiation up through the transparent sheet (20) over a lateral build plane (36) which defines a maximum addressable lateral range of the light engine. The fixture has a lower face that faces downwardly. The controller is configured to: (1) position the lower face of the fixture at the build plane, and (2) operate the light engine and movement mechanism to solidify a particle trapping sheet proximate to the transparent sheet and substantially spanning the build plane and to thereby trap particles that are present along the build plane.