Patents by Inventor Robert E. Hirt

Robert E. Hirt 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: 4819409
    Abstract: A method and apparatus are provided for packaging products between first and second plastic components sealed by using a hot melt adhesive applied by a dispensing applicator in one of several serially arranged stations of a packaging operation. The first plastic component is supported for indexing movement on a transport and moved under a hot melt applicator which is continuously driven in a predetermined path of travel which traverses the entire periphery of the product-loaded first plastic component. The first plastic component is stopped under the applicator for a predetermined dwell time during which the applicator dispenses the hot melt adhesive, then advanced to a position where the second plastic component is applied to form a filled package which is the evacuated and sealed. Apparatus is provided for preventing dripping or stringing of the hot melt adhesives.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: April 11, 1989
    Assignee: Mahaffy & Harder Engineering Co.
    Inventors: Reid A. Mahaffy, George W. Anderson, Eugene Garson, John A. Giordano, Robert E. Hirt, Milan R. Ostrow