Patents by Inventor Robert R. Fraas

Robert R. Fraas 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).

  • Semi-rigid sheet separation device and method
    Patent number: 4703925
    Abstract: A method and apparatus for ensuring sheet separation of a single sheet workpiece from a stack of workpiece sheets which consists of a lifting assembly having at least three spaced sets of sheet workpiece holding suction members with at least a poriton of one set being reciprocatable in a vertical movement to cause flexure of a sheet being raised by the lifting device to cause separation of an underlying sheet which may have adhered to the sheet being lifted.
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: November 3, 1987
    Assignee: Strippit/Di-Acro-Houdaille, Inc.
    Inventors: Ross R. Jelinek, Robert R. Fraas, Richard M. Stein, Lewis G. James