Patents by Inventor Ray S. Freed

Ray S. Freed has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Surface resolution in three-dimensional objects by inclusion of thin fill layers
    Patent number: 5209878
    Abstract: Methods and apparatus for reducing surface discontinuities, resulting from the formation of a three-dimensional object out of a plurality of stacked layers, during layer by layer stereolithographic formation of the three-dimensional object. The discontinuities between layers are reduced by utilizing formation and solidification of thin fill layers near the edges of thicker structural layers or by utilizing surface tension effects to smooth discontinuities between the structural layers by formation of meniscuses of building material and solidifying the meniscuses.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: May 11, 1993
    Assignee: 3D Systems, Inc.
    Inventors: Dennis R. Smalley, Hop D. Nguyen, Kris A. Schmidt, Herbert E. Evans, Ray S. Freed, Paul J. Jacobs