Plastic and nonmetallic article shaping or treating: processes – Stereolithographic shaping from liquid precursor
Patent
1995-03-13
1997-07-29
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Stereolithographic shaping from liquid precursor
118100, 118120, 118423, 118429, 118500, 118620, 118712, 1562728, 1562735, 1562755, 1563071, 1563796, 156538, 250432R, 2504921, 264308, 4251744, 427356, 427358, 427510, 427512, 427553, 427554, 427555, B29C 3508, B29C 4102
Patent
active
056519346
ABSTRACT:
Apparatus and method for stereolithographically forming a three-dimensional object includes a vessel for holding a building material and a smoothing member for forming a uniform coating over a previously formed layer of the object. The smoothing member has a plurality of blades. The smoothing member is swept over a previously formed layer of the object, in at least two directions. Different clearances between the lower surface of the smoothing member and the upper surface of the previously formed layer are used to provide a uniform coating for a subsequent layer over the previously formed layer. The sweeping velocity of the smoothing member can be varied. Retractable needles are attached to the smoothing member for adjusting a blade gap between a lower surface of the smoothing member and the surface of the building material.
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Almquist Thomas A.
Cohen Adam L.
Hull Charles W.
Jacobs Paul F.
Lewis Charles W.
3-D Systems, Inc.
Smalley Dennis R.
Tentoni Leo B.
Vradenburgh Anna M.
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