The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2023
Filed:
Apr. 19, 2021
Applicant:
Ivoclar Vivadent Ag, Schaan, LI;
Inventor:
Hendrik John, Buchs, CH;
Assignee:
Ivoclar Vivadent AG, Schaan, LI;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 64/124 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01); B29C 64/264 (2017.01); B29C 64/245 (2017.01); B29C 64/393 (2017.01);
U.S. Cl.
CPC ...
B29C 64/124 (2017.08); B29C 64/245 (2017.08); B29C 64/264 (2017.08); B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12);
Abstract
The present invention relates to a building platform () for building up a workpiece () in layers or continuously by stereolithography, comprising: a rear illumination device (-) for illuminating a layer (-n) from a rear side; a photosensor () for detecting a light intensity of a light from a front illumination device (-) through the layer (-n) and/or a material and/or a deflecting mirror; and a control device () for activating the rear illumination device (-) when the detected light intensity of the front illumination device (-) is above a predetermined threshold.