Patents by Inventor Hans-Achim Kunkel

Hans-Achim Kunkel 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).

  • Absorbent body of nonwoven material and a method for the production thereof
    Patent number: 4902559
    Abstract: Disclosed is an absorbent body of nonwoven material formed of randomly distributed thermoplastic endless filaments which contain embedded hydrophilic or oleophilic staple fibers and in some cases swelling particles. Also disclosed is a one-step process for the production of the absorbent body.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: February 20, 1990
    Assignee: Firma Carl Freudenberg
    Inventors: Helmut Eschwey, Lothar Hackler, Ludwig Hartmann, Michael Kauschke, Bernhard Klein, Thomas Kumpel, Hans-Achim Kunkel, Torsten Nahe, Ivo Ruzek
  • Apparatus for adhering thermally-softenable plastic particles into a plastic body
    Patent number: 4689004
    Abstract: Apparatus for adhering thermally-softenable particles to one another to form a plastic body has a molding tool reciprocable in a chamber for double piston action on a heated gas in the chamber. The molding tool defines a mold with opposite, gas-permeable walls in the directions of the reciprocation for receiving the particles. The double piston action of the reciprocation of the molding tool then forces the heated gas through the mold and particles therein to thermally soften the particles for adhering into the body.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: August 25, 1987
    Assignee: Firma Carl Freudenberg
    Inventor: Hans-Achim Kunkel
  • Interior lining for motor vehicles
    Patent number: 4432580
    Abstract: An interior lining for a motor vehicle is made from a foam layer of a cross-linked, closed-cell-foamed polypropylene laminated to a deep-drawable polyolefin sheet or a non-woven or woven fabric or laminated to both. The volumetric weight of the foam layer is 30 to 200 kg per cubic m. and provides dimensional and shape stability to the lining up to temperatures of about 120.degree. C.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: February 21, 1984
    Assignee: Firma Carl Freudenberg
    Inventors: Ernst Lohmar, Hans-Achim Kunkel