Patents Assigned to Veit Dennert KG Baustoffbetriebe
  • Apparatus for insulating building blocks
    Patent number: 4295810
    Abstract: A building block having at least one chamber therein which is filled with a foamed plastic material consisting of particles interconnected at their surfaces to form gas-permeable interstices. The block is formed by filling the chamber with a loose fill of the foamed plastic material and then fusing the particles to each other by blowing hot gas through an injection lance inserted in the fill.
    Type: Grant
    Filed: June 5, 1979
    Date of Patent: October 20, 1981
    Assignee: Veit Dennert KG Baustoffbetriebe
    Inventors: Heinz Dennert, Hans V. Dennert