Patent ID: 6585847
Filing Date: 2003-07-01
Classification: B29C,G03F

Abstract:
A plurality of sheets of material for use in forming the three dimensional configuration of an article by exposing portions of each sheet to actinic radiation configured in the shape of an incremental heighth of the article to facilitate a change in the reactivity of the exposed portions of each sheet, stacking successive sheets to form a matrix, segregating the configuration of the article by effecting a change in a physical property of the exposed portions and separating the configuration of the article from the remainder of the matrix, each sheet comprising at least one layer of substantially uniform thickness, the one layer comprising a mixture of a polymer material, the sheets being positionable in a stack with successive sheets of the stack touching one another and with the exposed portions being in registration with the corresponding exposed portions of the preceding sheet, the mixture of polymer material comprising a base resin constituent, a reactive diluent constituent and reaction modifying means responsive to actinic radiation for effecting a change in the chemical reactivity of the polymer material in the exposed portions, in order to provide a subsequent curing of the polymer material which has undergone a change in chemical reactivity and a differential change in a physical property of the polymer material.