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1. (WO2017040521) SELECTIVELY ACTIVATED MESH DISCHARGE POWDER RECOATER FOR THREE-DIMENSIONAL PRINTING

Pub. No.:    WO/2017/040521    International Application No.:    PCT/US2016/049484
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Aug 31 01:59:59 CEST 2016
IPC: B23K 26/34
B33Y 30/00
C22C 38/02
Applicants: THE EXONE COMPANY
Inventors: KLEIN, Andrew, P.
VOSS, Lawrence, J.
DUGAN, Anthony, S.
ORNER, Michael, R.
LIZZI, Thomas
Title: SELECTIVELY ACTIVATED MESH DISCHARGE POWDER RECOATER FOR THREE-DIMENSIONAL PRINTING
Abstract:
Recoaters (30) are described which are adapted for use in powder-layer three-dimensional printers (110). The recoaters (30) comprise a mesh discharge device (44) that is adapted to be selectively activated by the application of an agitation, e.g. a vibration. Such mesh discharge devices (44) include a planar mesh (46), i.e. a screen or sieve, which is adapted to support a quantity of powder when the quantity of powder and the mesh (46) are static and to dispense at least a portion of the quantity of powder when at least one of the quantity of powder and the mesh (46) is agitated. Preferably, the mesh (46) is disposed substantially horizontally, but may be disposed at an angle to the horizontal. Also described are powder layer three-dimensional printers (110) comprising such recoaters.