Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1990-10-30
1993-05-11
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
118407, 118423, 118428, 118429, 118620, 1562735, 1562755, 1563071, 1563796, 250432R, 2504921, 264232, 264308, 264340, 264343, 364476, 365106, 365107, B29C 3508, B29C 4102
Patent
active
052098788
ABSTRACT:
Methods and apparatus for reducing surface discontinuities, resulting from the formation of a three-dimensional object out of a plurality of stacked layers, during layer by layer stereolithographic formation of the three-dimensional object. The discontinuities between layers are reduced by utilizing formation and solidification of thin fill layers near the edges of thicker structural layers or by utilizing surface tension effects to smooth discontinuities between the structural layers by formation of meniscuses of building material and solidifying the meniscuses.
REFERENCES:
patent: 4752498 (1988-06-01), Fudim
Sculpting Parts with Light by Efrem v. Fudim, published Mar. 6, 1986.
Automatic method for fabricating a three-dimensional plastic model with photo-hardening polymer by Hideo Kodama, published Nov. 1981.
A new method of three-dimensional micromachining by Efrem Fudim, published Sep. 1985.
Evans Herbert E.
Freed Ray S.
Jacobs Paul J.
Nguyen Hop D.
Schmidt Kris A.
3-D Systems, Inc.
Tentoni Leo B.
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