Patents by Inventor Richard Russell Perdue

Richard Russell Perdue 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).

  • Patent number: 3950919
    Abstract: The invention disclosed is directed to a new improved apparatus for vacuum skin packaging an article between two flexible web layers. The apparatus includes two molds, each having an inner wall defining a generally concave open cavity and terminating to a lip about the cavity opening, means for receiving and releasing web layers in wall-conforming shape, means for releasably receiving outer portions of the web layers adjacent the lips, means for registering the molds to provide a partially enclosed third cavity, and means for reducing pressure substantially throughout the third cavity by removing gaseous composition therefrom through a passageway means provided by portions of the lips which are spaced apart when the molds are in packaging register. Also disclosed is a process for vacuum skin packaging. If desired, the process may be performed using the apparatus.
    Type: Grant
    Filed: August 22, 1974
    Date of Patent: April 20, 1976
    Assignee: W. R. Grace & Co.
    Inventor: Richard Russell Perdue