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1. (WO2018222405) THREE DIMENSIONAL PRINTING SYSTEM WITH IMPROVED OPTICAL PATH

Pub. No.:    WO/2018/222405    International Application No.:    PCT/US2018/033192
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri May 18 01:59:59 CEST 2018
IPC: B29C 64/124
B29C 64/20
B29C 64/223
Applicants: 3D SYSTEMS, INC.
Inventors: TANNER, Christopher
Title: THREE DIMENSIONAL PRINTING SYSTEM WITH IMPROVED OPTICAL PATH
Abstract:
A three dimensional printing system (2) includes a support plate (10), a resin vessel (20), and one or more mechanical features (152). The support plate includes a ridge surrounding a first central opening. The resin vessel includes a vessel body defining an inner edge surrounding a second central opening and a transparent sheet (55) that closes the central opening to define a lower bound for a body of resin to be contained within the resin vessel. The one or more mechanical features are configured to align and secure the resin vessel relative to the support plate whereby the ridge engages a lower surface of the transparent sheet to tension the transparent sheet and the ridge is laterally recessed inwardly relative to the inner edge of the vessel body.