Patents by Inventor Marc Kerger

Marc Kerger 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).

  • Device for the coextrusion of thermoplastics
    Patent number: 4657497
    Abstract: A device for avoiding flow disturbances and stagnation during the production of hollow or solid multilayer elongate structures.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: April 14, 1987
    Assignee: SOLVAY & Cie (Societe Anonyme)
    Inventors: Claude Dehennau, Marc Kerger, Leon Dubuisson
  • Feed block for a flat coextrusion die
    Patent number: 4652225
    Abstract: The block comprises a central channel (2) which feeds a first molten plastic, and at least one secondary channel (5, 10) which feeds a different molten plastic and connects to the central channel (2) upstream of the die, the central channel (2) in the connection zone, being equipped with a flat portion (11) which alters the cross-section of the channel, the said flat portion (11) being mounted in a removable piece (12) coaxial with the central channel and arranged in a guide tube (13) which intersects the central channel (2) and runs through the feed block (1), the said block being equipped with means (20), (21) for gradually withdrawing the removable piece (12) via the guide tube (13) and for replacing it by another removable piece (18) equipped with an identical or different flat portion (19).The block is particularly suitable for feeding a flat die which delivers films, sheets or composite panels.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: March 24, 1987
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Claude Dehennau, Marc Kerger