Patents Assigned to Vin-Tex Sealers Inc.
  • Method for sealing plastic sheets
    Patent number: 4135957
    Abstract: A method and apparatus are disclosed for sealing flexible plastic sheets together. The method is performed by use of a die wherein a pair of longitudinal grooves are provided at the edge of the sealing area. The die is connected to a source of radio frequency energy and the sheets are placed between the die faces to effect the seal. Due to the provision of the grooves the sealing is effected without the extrusion of material into the space between the sheets thereby to produce a stronger and more satisfactory bond.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: January 23, 1979
    Assignee: Vin-Tex Sealers Inc.
    Inventor: Ronald L. Voller