Patents Assigned to Ahlstrom Lystil SA
  • Use of an air permeable paper sheet as support element for a stack of fabrics
    Patent number: 6699353
    Abstract: The invention concerns an air permeable paper sheet as support element for a layer of fabrics (mat) on a production line in particular during the cutting phase. The invention is characterized in that said sheet has in its thickness pores or fine perforations distributed over the whole surface thereof, said sheet having a bulkiness or hand more than 2.5 cm3/g, enabling it to allow air to pass through by the suction effect produced from beneath its lower surface.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: March 2, 2004
    Assignee: Ahlstrom Lystil SA
    Inventors: Christophe Guillaumot, Didier Bigot