Patents by Inventor Roland E. Groethe

Roland E. Groethe 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 manufacturing shear blades for shearing hot glass
    Patent number: 4515002
    Abstract: A method of making a shear blade for shearing gobs of hot glass without noticeable shear marks. The method comprises heating a blade of tool steel to a minimum of about 400.degree. F. (for 0.08-inch thick tool steel), stamping the desired outline shape of the heated blank by one set of dies and following by forming the blade in its final shape at such temperature by a second set of dies. The method involves heating thicker shapes at higher temperatures.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: May 7, 1985
    Inventor: Roland E. Groethe