Patents by Inventor Murray Edward Bruce Leighton

Murray Edward Bruce Leighton 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).

  • Splicing unit and method of splicing
    Publication number: 20010047845
    Abstract: In the manufacture of plastics bags using reclosable zipper strip (10, 14) with engageable male and female profiles (12, 16), a butt splicing operation is used to speed up the changeover from one reel of zipper strip to another. The trailing end of one strip and the leading end of the next strip are brought together in abutting relationship within a splicing unit, sealing material (22) is overlaid on the end zones of opposite sides of the strips, and this is sealed to the underlying zipper strips, preferably using heat and pressure. The flanges (18) of the zipper strips are held apart by separator plates (20) during the sealing operation.
    Type: Application
    Filed: August 8, 2001
    Publication date: December 6, 2001
    Inventor: Murray Edward Bruce Leighton
  • Splicing unit and method of splicing
    Patent number: 6290795
    Abstract: In the manufacture of plastics bags using reclosable zipper strip (10,14) with engageable male and female profiles (12,16), a butt splicing operation is used to speed up the changeover from one reel of zipper strip to another. The trailing end of one strip and the leading end of the next strip are brought together in abutting relationship within a splicing unit, sealing material (22) is overlaid on the end zones of opposite sides of the strips, and this is sealed to the underlying zipper strips, preferably using heat and pressure. The flanges (18) of the zipper strips are held apart by separator plates (20) during the sealing operation.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: September 18, 2001
    Inventor: Murray Edward Bruce Leighton