Solid imaging apparatus having a semi-permeable film

U.S. Patent Number: 5391072

Abstract: An apparatus for fabricating integral three-dimensional objects from successive layers of photoformable compositions by exposing the layers of the composition through a semi-permeable film that allows creation of release coatings on the side of the film facing the composition.

Inventors: Lawton; John A. (Landenberg, PA), Adams; Jerome T. (Newark, DE)

Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)

Application Number: 07/829,243

Issued: 1995-02-21

Expired: 2007-02-21

Classes: 425/174.4 ; 264/401

Field of search: 425/174.4,174 264/22,308 118/620 427/53.1,55,54.1 430/270

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