Plastic article or earthenware shaping or treating: apparatus – Means applying electrical or wave energy directly to work – Radiated energy
Patent
1990-02-15
1991-12-10
Housel, James C.
Plastic article or earthenware shaping or treating: apparatus
Means applying electrical or wave energy directly to work
Radiated energy
118603, 118620, 118693, 1562728, 264 22, 425217, B29C 3508, B29C 6700, G03C 908
Patent
active
050713370
ABSTRACT:
A solid three-dimensional article is formed from a liquid medium by initially coating a layer of the liquid medium on an apertured support plate. An initial cross-section or profile of the article then is formed by solidifying the liquid medium, or at least a portion thereof, on the support plate. An expandable member at a bottom of a container for holding a supply of the liquid medium, then is expanded an incremental amount to raise the level of the liquid medium in the container upward through the apertured support plate to a level above the support plate so as to form a meniscus around the solidified cross-section or profile of the article. The solidified cross-section or profile of the article then is coated with an additional layer of the liquid medium, causing the meniscus to break and the just-added liquid medium layer and the previous liquid medium to merge, whereupon the additional layer is essentially immediately solidified to form another cross-section or profile of the article. The expandable member then is again expanded an incremental amount to again raise the level of the liquid medium in the container upward to define a meniscus around the second solidified cross-section or profile of the article. The foregoing sequence of operation then is repeated until the article has been completely formed.
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Heller Timmy B.
Hill Ray M.
Saggal Abdalla F.
Housel James C.
Quadrax Corporation
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