Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1992-05-06
1993-11-02
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
73293, 73305, 73319, 733225, 118423, 118429, 118620, 118712, 156 64, 1562735, 1562755, 1563071, 156378, 1563796, 250432R, 2504921, 250577, 264 401, 264 402, 264 404, 264308, 340619, 340623, 340624, 365106, 365107, 425135, 425140, 425147, 4251744, 427 8, 427512, 427553, 427554, B29C 3508, B29C 4102
Patent
active
052581462
ABSTRACT:
Improved apparatus and methods for forming a layer of material over a surface of a previously-formed cross-section of a three-dimensional object in anticipation of forming a next cross-section of the object out of the layer. A volume of material, including at least some excess material, is placed over the surface, and the excess material is swept off by placing the excess material in the predetermined path of a sweeping member, the path being substantially in a plane spaced from a working surface of material. The member may be directed to sweep the excess material away through a successive number of sweeps, which may vary for each cross-section, at least a velocity which may vary for each sweep. Additionally, the clearance between the member and the surface of the previous cross-section may vary for each sweep. A "winged" member is also provided, comprising two legs extending from a base, and a "Trident" embodiment is also provided, comprising three legs extending from a base.
REFERENCES:
patent: 2682887 (1954-07-01), Getz
patent: 4575330 (1986-03-01), Hull
Almquist Thomas A.
Cohen Adam L.
Jacobs Paul F.
Lewis Charles W.
Lewis Mark A.
3-D Systems, Inc.
Tentoni Leo B.
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