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Solid imaging apparatus and method with coating station

  • US 5,626,919 A
  • Filed: 05/18/1992
  • Issued: 05/06/1997
  • Est. Priority Date: 03/01/1990
  • Status: Expired due to Term
First Claim
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1. In an apparatus for fabricating an integral three-dimensional object by selectively exposing successive layers of a liquid photoformable composition to actinic radiation, said apparatus including imaging means for exposing said layers, a vessel for containing a fixed amount of said composition so as to present a free surface at a substantially constant position relative to said imaging means, and a movable platform disposed within said vessel below said free surface, the improvement in said apparatus comprising:

  • a dispenser adapted to be dipped under said free surface and directly transfer part of said composition above said free surface;

    means attached to said dispenser for lowering and raising said dispenser at predetermined positions alongside said platform; and

    layering means for contacting the composition transferred above said free surface and moving over said platform to form a layer of said composition.

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