Apparatus for Building a Three-Dimensional Article and a Method for Building a Three-Dimensional Article
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United States of America Patent
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Issued Date -
Oct 2, 2008
app pub date -
Sep 19, 2006
filing date -
Sep 20, 2005
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Abandoned
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Abstract
The invention provides an apparatus for building a three-dimensional article in sequential cross-sectional layers, which apparatus comprises: a powder delivery system comprising one or more reservoirs for delivering a powder and a powder spreading system; a printing system for delivering a liquid; a build chamber comprising a outer wall, an inner wall and a build platform which is movable along the inner wall of the build chamber; and a powder recovery system; wherein the building chamber comprises a space defined by the upper portion between the inner wall and the outer wall of the building chamber and this space is in communication with the powder recovery system and/or the build platform is capable of releasing unused powder (directly) from the build chamber in a downward direction into the powder recovery system. The invention further provides a method building a three-dimensional article wherein use is made of said apparatus.
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