Method of and apparatus for production of three-dimensional objects by stereolithography with reduced curl
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United States of America Patent
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Apr 14, 1992
Issued Date -
N/A
app pub date -
Apr 17, 1989
filing date -
Apr 18, 1988
priority date (Note) -
Expired
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Abstract
An improved sterolithography system for generating a three-dimensional object from object defining information, the information defining the object being structurally specified to reduce curl, stress and distortion in the ultimately formed object is described. A stereolithographic distortion known as curl is reduced by the system, and several techniques to eliminate or reduce curl are utilized by the system, including dashed line, bent line, secondary structure, rivets, and multi-pass techniques.
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