Patents Assigned to Poly-Lina Ltd.
  • Manufacture of bags
    Patent number: 5890810
    Abstract: An extruded plastics tube is flattened and the lateral side portions (4) are folded to form inwardly extending gussets (2). Each gusseted side portion is then folded about a longitudinal fold line (5) onto the medial portion (3) between the side portions. The resultant layers are heat sealed to form the bottom of the bag.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: April 6, 1999
    Assignee: Poly-Lina Ltd.
    Inventor: Garry Barlow