Patents by Inventor Edmund Drozkowski

Edmund Drozkowski 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).

  • Application head for applying an interrupted bead of material
    Patent number: 6024299
    Abstract: A device to apply liquid adhesive, especially hot-melt adhesive, to a length of material with the adhesive being interrupted includes an application head which has a control element with a pass-through channel and a rotatingly drivable control slide. The pass-through channel is connected to a supply channel for molten hot-melt adhesive at its entry end and to a nozzle aperture for the molten adhesive at its exit end. The control slide, in the course of a 360 degree rotation, opens and closes the pass-through channel at least once.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: February 15, 2000
    Assignee: Rudolf von Bargen
    Inventor: Edmund Drozkowski