Patents by Inventor Karl J. Kraft

Karl J. Kraft 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).

  • Process for producing fiber-reinforced molded products
    Patent number: 4405752
    Abstract: The instant invention is directed to a process for the production of fiber-reinforced molded products, comprising:(1) mixing at a temperature of from 10.degree. to 50.degree. C.,(a) 7 to 35% by weight of a polyisocyanate having a melting point above 100.degree. C.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: September 20, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Recker, Gerd Reinecke, Albert Awater, Gerhard Grogler, Karl J. Kraft
  • Equipment for the continuous production of foam boards
    Patent number: 4270889
    Abstract: The invention relates to equipment for the continuous production of foam boards, which may be laminated between facings, from a liquid foamable reaction mixture. The apparatus broadly comprises a conveyor, a foam mixture application device located at or near one end of the conveyor and a transverse foam mixture distribution device located downstream of said application device and above said conveyor, the space between said distribution device and said conveyor being adjustable.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: June 2, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Hoffmann, Kurt Krippl, Karl J. Kraft, Gerd Gabrysch, Frank Redmer
  • Equipment for the continuous production of foam boards
    Patent number: 4264291
    Abstract: The invention relates to equipment for the continuous production of foam boards, which may be laminated between facings, from a liquid foamable reaction mixture. The apparatus broadly comprises(i) a conveyor,(ii) an inclined table at one end of said conveyor, the incline of said table sloping downwardly toward said conveyor,(iii) a foam mixture application device located above said downwardly sloping surface, and(iv) a transverse foam mixture distribution device located downstream of said application device and located above said downwardly sloping surface thereby forming a space therewith. When sheets or relatively thin foam boards or sandwich boards are produced, the device used is generally additionally equipped with an upper conveyor. This invention primarily relates to such double conveyors. The liquid reaction mixture must be applied over the entire width in a particularly uniform layer in order to obtain a perfect final product.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: April 28, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Hoffmann, Werner Dietrich, Karl J. Kraft
  • Equipment for the continuous production of foam boards
    Patent number: 4255105
    Abstract: The present invention relates to equipment for the continuous production of foam boards, and particularly rigid foam boards, which may be laminated between facings. The apparatus broadly comprises a conveyor, which at the pouring end is equipped with an inclined table and a transverse distribution device, and a foam mixture application device provided above the table.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: March 10, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erwin Hoffmann, Werner Dietrich, Karl J. Kraft
  • Thermosetting molding compositions containing polyurethane and a fibrous material, and a process for the production of moldings
    Patent number: 4251428
    Abstract: This invention relates to storable, solvent-free, thermosetting polyurethane-based molding compositions containing a fibrous reinforcing material and to the production of fiber-reinforced moldings using these molding compositions.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: February 17, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Recker, Gerd Reinecke, Karl J. Kraft