Patents by Inventor David Michael Angless

David Michael Angless has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Manufacture of bags
    Patent number: 6254520
    Abstract: In the manufacture of bags with handles, an extruded plastics tube is extruded, folded inwardly by a first folding device (21) to form gusseted side portions (4) and flattened. A transverse heat seal is formed by a sealing device (22) and a cutting device (23) removes a central section of the tubing to form handle portions (10). The gusseted side portions (4) are folded in turn onto a medial tubing portion (3) by a second folding device (24) having arcuate folding ramps and a further transverse heat seal and a transverse perforation line are applied to the base of the bag.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: July 3, 2001
    Assignee: Poly-Lina Limited
    Inventor: David Michael Angless