Patents by Inventor Klaus Lund

Klaus Lund 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).

  • Flexible, multi-layer film having elevated stiffness, dimensional stability and flex crack resistance
    Patent number: 6270882
    Abstract: The present invention relates to a heat sealable, unoriented multi-layer film consisting of a sequence of layers (I) comprising one or more plies on the outer side of the film, a sequence of layers (II) also comprising at least one ply, denoted the heat sealable layer, on the other outer side of the film, optionally together with a coupling sequence of layers (III), also of one or more plies, between the sequences of layers (I) and (II), wherein the multi-layer film is characterized in that the sequence of layers (I) contains at least one layer (i) of a linear alternating copolymer (1) of carbon monoxide and at least one ethylenically unsaturated olefin, optionally together with one or more layers (ii) containing polyamide, characterised in that the ratio between the thicknesses of the sequence of layers (I) and the total multi-layer film is no greater than 0.6 and no less than 0.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: August 7, 2001
    Assignee: Wolff Walsrode AG
    Inventors: Holger Eggers, Klaus Lund, Rainer Brandt, Bernd Sperlich
  • Metal-free barrier-layer films
    Patent number: 5230948
    Abstract: The invention relates to composite films having a particularly good barrier effect against gases and water vapor without a metal layer, for example of aluminum, having to be present.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: July 27, 1993
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Holger Preiss, Richarda Bochow, Klaus Lund
  • Composite films free from metal layers
    Patent number: 5145731
    Abstract: The composite film contains individual layers of polyvinyl alcohol, a polyolefin, an ethylene/vinyl alcohol and a polyolefin in that order and is comparable in its barrier properties to water vapor and gas with composite films containing metal layers without having any of their disadvantages.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: September 8, 1992
    Assignee: Wolff Walsrode AG
    Inventors: Klaus Lund, Holger Preiss