Patents by Inventor Guenter Klafka

Guenter Klafka 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).

  • Interlayer composite structure for laminated glass with controlled bonding between the layers and the process for the production of the interlayer structure
    Patent number: 6649269
    Abstract: A process for the production of multi-ply polyvinyl butyral interlayer having improved separation force whereby multiple plies are combined in a tension controlled process comprising overlaying a layer of polyvinyl butyral sheeting having water drops on its surface with a second layer of polyvinyl butyral sheeting.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: November 18, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Thomas Richard Phillips, Guenter Klafka, Ingo Kueppenbender
  • Interlayer structure for laminated glass
    Patent number: 6451435
    Abstract: The present invention relates to an interlayer product for laminated safety glass whereby multiple layers of interlocking interlayer film having the desired properties of thickness and melt fracture surface pattern are combined to meet a specific functional need. In the present invention, two or more rolls of sheeting comprising polyvinyl butyral as the primary component are simultaneously unwound and rewound together under controlled tension, line speed and temperature so that the edges of the respective layers are aligned and roll formation is normal, the tension on the respective sheets is equal, thickness is maintained and entrapped air is minimized. The resulting product is used to produce laminated safety glass with thick interlayer construction.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: September 17, 2002
    Assignee: E. I. du Pont de Nemours & Co.
    Inventors: Guenter Klafka, Richard Wiemer