Patents Assigned to Zip-Pak, Inc.
  • Apparatus and method for making Z-folded zippered film
    Patent number: 5047002
    Abstract: A method and apparatus for producing rolls of thermoplastic film stock wherein zipper elements are interlocked for structural support while the web is open, resembling a "Z" in cross-section, and ready for use on container and packaging machines.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: September 10, 1991
    Assignee: Zip-Pak, Inc.
    Inventors: Larry M. Zieke, James C. Pawloski
  • Sealing jaw for heat sealable film with zippered section
    Patent number: 5021117
    Abstract: A mechanism and method for seaming and joining overlaid sheets such as to form seams on adjacent bags by applying heated pressure sealing jaws to opposite sides of the overlaid sheets with the pressure being applied decreasingly inwardly away from the edges of the seam and cutting the seaming areas between them to separate the seamed portions so as to form edges of adjacent bags with the bags preferably having rib and groove upper fasteners extending outwardly to the edge of the seam.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: June 4, 1991
    Assignee: Zip-Pak, Inc.
    Inventor: Hugo Boeckmann
  • Snowmobile hood
    Patent number: D342220
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: December 14, 1993
    Assignee: Zip-Pak, Inc.
    Inventor: Miklos D. Hornai