By Work Engaging Applicator Patents (Class 493/277)
  • Patent number: 5713824
    Abstract: A method is provided of manufacturing an easy-open container. A bodywall layer strip is positioned on a wider liner layer strip to define first and second edge portions on the side of the wider liner layer which extends transversely beyond the bodywall layer side edges. These layers are fed to a mandrel and the first liner layer edge portion is folded-over onto an outside surface of the bodywall layer and a high strength bond is formed therebetween. The resulting layers are spirally wound on the mandrel to form a continuous tube having a spiral seam with the bodywall layer side edges forming a butt joint and with each of the first and second liner layer edge portions extending through the butt joint and out of the spiral seam. The second liner layer edge portion is positioned on the first folded-over liner layer edge portion and a low strength bond is formed therebetween. A flexible label layer is spirally wound onto the tube on the mandrel with its longitudinal edges in overlapped relationship.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: February 3, 1998
    Assignee: Sonoco Products Company
    Inventors: Michael T. Drummond, Calvin G. Hill, Richard M. Lowman, Jr., William C. Suski, Rodney W. Roberts, James W. Lowry