Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1990-10-30
1993-03-09
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
118429, 118620, 118713, 156 64, 1562733, 1562735, 1562755, 1563071, 156378, 1563796, 2504921, 264 401, 264308, 364476, 365106, 365107, 425135, 4251744, 427 531, 427 541, 4273935, B29C 3508, B29C 4102, B29C 4152
Patent
active
051924692
ABSTRACT:
A method and apparatus for making an object by stereolithography from layers of a medium solidifiable upon exposure to synergistic stimulation by selecting an area element of a first layer of medium. The depth of the medium within the object underlying the area element is determined and compared to the depth to the minimum solidification depth of the medium. The area element is exposed to solidifying synergistic stimulation only if the depth of the medium equals or exceeds the minimum solidification depth. A next layer is created over the first layer without exposing the first layer to solidifying synergistic stimulation, if the depth is less than the minimum solidification depth. The layers may have a thickness selected such that the minimum solidification depth is a integer multiple of the layer thickness.
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Japanese Patent Publication 2-95830, Y. Nakamura et al., "Method of Formation of Three-Dimensional Configurations", Published Apr. 6, 1990; Japanese and English translation, pp. 176 and 177.
JP 2-95831, A. Kuribayashi et al., "Method of Formation of Three-Dimensional Configurations and Its Apparatus", Published Apr. 6, 1990; Japanese and English translation; p. 179, Claims 1, p. 183.
"A Photopolymerization Method of Preparing Three-dimensional Terrain Models", C. Claus et al., Published in Photographic Science and Engineering, vol. 5, No. 4, Jul.-Aug. 1961, pp. 211-215.
"A New Method of Three-Dimensional Micromachining", E. Fudim, Published in Mechanical Engineering, Sep. 1985, pp. 54-59.
"Sculpting with Light", E. Fudim, published in Machine Design, Mar. 6, 1985, pp. 102-106.
Smalley Dennis R.
Vorgitch Thomas J.
3-D Systems, Inc.
Tentoni Leo B.
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