Patents Assigned to Siegwerk Druckfarben GmbH & Co. KG
  • Patent number: 6949290
    Abstract: A method of manufacturing an imprinted effect in a plastic film, characterized by the following steps: (a) applying a hardenable mixture of lacquer and solvent subject to volumetric shrinkage in liquid form to a localized area of the plastic film, whereby the plastic film surface is for all practical purposes made insoluble by the solvent; (b) drying the lacquer-solvent material; (c) hardening the lacquer to a lacquer-laminate layer that is completely bound to a localized area of the surface; and (d) allowing the lacquer-laminate layer to shrink, with a simultaneous tightening of the laminated plastic film below the lacquer-laminate layer without formation of wrinkles.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: September 27, 2005
    Assignee: Siegwerk Druckfarben GmbH & Co. KG
    Inventors: Lothar Schaeffeler, Wolfgang Mauer
  • Patent number: 5496879
    Abstract: A solid or amorphous printing ink, especially a gravure printing ink, is fused to become printable in a fluidized condition. The ink is fixed on imprint material by solidification by heat extraction or cooling. The ink includes a binder-material having at least two component groups with each having at least one member, of which members of the first component group have the property to act as solvent for the members of the second group of components. The members of the first component group are solid state crystalline materials. The materials are solid at ambient temperature with a relatively low melting point. The members of the second component group are in a vitreous solid or amorphous condition at ambient temperature. These materials, especially polymers, are soluble in the molten first component group.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: March 5, 1996
    Assignee: Siegwerk Druckfarben GmbH & Co. KG
    Inventors: Rudolf Griebel, Karl A. Kocherscheid, Klaus Stammen