Patents by Inventor Edwin I. Groff

Edwin I. Groff 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).

  • Method of making pretzels of selected spiral pitch
    Patent number: 4288463
    Abstract: A pretzel making method wherein dough is extruded and the extrusion is rotated about an eccentric axis into a spiral configuration for baking.The extruded dough is gravitationally passed to a conveyor belt. The vertical distance that the dough downwardly passes through is varied to change the wound spiral to a selected pitch.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: September 8, 1981
    Inventors: Edwin I. Groff, Edwin T. Groff
  • Oven heating system
    Patent number: 4120646
    Abstract: Heating apparatus for a baking oven or the like wherein product to be heated or baked is conveyed through the oven, and a plurality of heating elements are arranged longitudinally along the path of product movement through the oven, the heating elements each comprising a conductive tube extending transversely across the path of product movement, a burner at one tube end for introducing a combustible mixture therein, and combustion products outlet means at the other tube end for discharge into the oven chamber.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: October 17, 1978
    Inventors: Edwin I. Groff, Edwin Terry Groff