Method of and apparatus for production of three dimensional objects by stereolithography
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United States of America Patent
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Aug 17, 1993
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app pub date -
Feb 21, 1992
filing date -
Aug 8, 1984
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Abstract
A stereolithographic system for automatically generating three-dimensional objects on a layer by layer basis by alternately forming layers of medium over previously formed layers of the object and selectively solidifying successive layers of medium at a surface of a body of the medium whereby the object is formed from a plurality of solidified and adhered layers. The surface of the body of medium is maintained at a desired working surface, for example by detecting its level and relatively adjusting it and the working surface so that they coincide.
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