Patents by Inventor Hans-Dieter Wittern

Hans-Dieter Wittern 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).

  • Closure tie for tubes of film material for enclosing food, a method of forming the tie and apparatus for carrying out this method
    Patent number: 4364511
    Abstract: A tube of film material for enclosing food has a closure tie with a suspension loop, the enclosure tie including the knot lying in a recess in the pleated tip of the film material. The recess in which the tie is located is formed by softening the tube by heating, for example, with warm air, infrared radiation, ultrasonic means, by previously heating the tie filament, or by treating the film material with solvents or softening agents. Apparatus is disclosed for carrying out the process.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: December 21, 1982
    Assignee: Naturin-Werk Becker & Co.
    Inventors: Hans-Dieter Wittern, Fred Geyer