Patent ID: 6699424
Filing Date: 2004-03-02
Classification: B29C,B33Y

Abstract:
A method of forming a three-dimensional object part having multiple border exposures in layerwise fashion by selectively solidifying a photocurable build material comprising:(a) solidifying a main part area of the three-dimensional object part in a first curable layer build material to form a first cured layer; (b) delaying for a desired period of time after solidifying the main part area; (c) solidifying borders surrounding the main part area in the first cured layer in multiple boundary drawings from areas closest to the main part area to areas furthest from the main part area to permit the build material to fill shrunken areas to reduce surface anomalies and preserve border integrity and flatness; and (d) repeating steps a-c in a second layer of curable build material overlying at least a portion of the first cured layer of build material to form a three-dimensional object part.