Patents by Inventor Heiko E. Schenck

Heiko E. Schenck 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).

  • Publication number: 20180264787
    Abstract: Disclosed is a multilayer biaxially oriented sheet- or tube-type food casing or food packaging film comprising in order from outside to inside an outside surface layer preferably comprising polyester; a gas barrier layer preferably comprising ethylene vinyl alcohol copolymer positioned so that at least 60% of the total film thickness is to the inside of the gas barrier layer with respect to a package prepared from the film; an optionally shrinkable forming layer comprising polyolefins or ethylene copolymers; and an inside surface layer comprising polyethylene homopolymer or an ethylene alkyl (meth)acrylic acid copolymer or ionomer thereof. The casing or film can be produced by a blown film process and biaxially oriented by a triple-bubble process or by cast film process and biaxially oriented by a tenter frame process.
    Type: Application
    Filed: September 29, 2015
    Publication date: September 20, 2018
    Inventors: Karlheinz Hausmann, Yves M. Trouilhet, Camille Olry, Heiko E. Schenck
  • Patent number: 8202590
    Abstract: Heat shrinkable oriented multilayer films are disclosed that comprise a structural layer, a heat sealing layer and a gas barrier layer. The structural layer comprises a polymer selected from the group consisting of copolymers of ethylene and a C3 to C8,-ethylenically unsaturated carboxylic acid, ionomers of the copolymers, polyesters, and blends thereof. The heat sealing layer comprises a polymer selected from the group consisting of ethylene vinyl acetate copolymers, ethylene alkyl acrylate copolymers, ethylene alkyl methacrylate copolymers, polyethylene, and blends thereof. The barrier layer, which is positioned between the structural and heat sealing layer, comprises at least one ethylene vinyl alcohol copolymer that has from about 2 to about 8 mol % 1,2-glycol structural units incorporated in the copolymer backbone chain. The films are particularly suitable for use in manufacture of shrinkbags.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: June 19, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, Heiko E. Schenck
  • Publication number: 20090029081
    Abstract: Heat shrinkable oriented multilayer films are disclosed that comprise a structural layer, a heat sealing layer and a gas barrier layer. The structural layer comprises a polymer selected from the group consisting of copolymers of ethylene and a C3 to C8, -ethylenically unsaturated carboxylic acid, ionomers of the copolymers, polyesters, and blends thereof. The heat sealing layer comprises a polymer selected from the group consisting of ethylene vinyl acetate copolymers, ethylene alkyl acrylate copolymers, ethylene alkyl methacrylate copolymers, polyethylene, and blends thereof. The barrier layer, which is positioned between the structural and heat sealing layer, comprises at least one ethylene vinyl alcohol copolymer that has from about 2 to about 8 mol % 1,2-glycol structural units incorporated in the copolymer backbone chain. The films are particularly suitable for use in manufacture of shrinkbags.
    Type: Application
    Filed: July 23, 2007
    Publication date: January 29, 2009
    Inventors: I-Hwa Lee, Heiko E. Schenck
  • Publication number: 20090029080
    Abstract: A process for preparing a multilayer biaxially oriented polyester film is provided wherein at least one layer comprises a blend of a poly(trimethylene terephthalate) resin and an additional polyester resin. Such films are particularly adapted for use in manufacture of packaging films.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 29, 2009
    Inventors: Donna Lynn Visioli, Heiko E. Schenck
  • Patent number: 6764753
    Abstract: Smokable films, in particular tubular films, comprising i) an aliphatic polyamide and ii) a block copolyetherester elastomer are provided. A process for manufacturing these films is also provided. The films of the invention show excellent water vapor permeability at high temperatures and barrier properties at room temperature. They are suitable for preparation of tubular casings, in particular smoked foodstuff casings.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: July 20, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Heiko E. Schenck, Dagmar Laue, Yannick Albertone
  • Publication number: 20030055181
    Abstract: Smokable films, in particular tubular films, comprising i) an aliphatic polyamide and ii) a block copolyetherester elastomer are provided. A process for manufacturing these films is also provided. The films of the invention show excellent water vapor permeability at high temperatures and barrier properties at room temperature. They are suitable for preparation of tubular casings, in particular smoked foodstuff casings.
    Type: Application
    Filed: April 10, 2002
    Publication date: March 20, 2003
    Inventors: Heiko E. Schenck, Dagmar Laue, Yannick Albertone
  • Patent number: 5912084
    Abstract: A seal layer formed from a thermoplastic polymer blend comprising (a) a non-polar, non-ionomeric polyolefin, and (b) a polar ethylene copolymer having carbon monoxide functionality, and its use to adhere adjacent thermoplastic films together to form a package. Since the bonding strength of the thermoplastic films to one another and to the seal layer is greater than the internal cohesion strength of the seal layer itself, the seal layer provides for an easy open package.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: June 15, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Karlheinz Hausmann, Hans Dieter Flieger, Heiko E. Schenck, David R. Sparrow