Patents by Inventor John M. DeFriese

John M. DeFriese 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).

  • Infinite universal sealing assembly
    Patent number: 6027596
    Abstract: An infinite heat sealing assembly preferably for heat sealing a thermoplastic heat-shrinkable plastic film, has a heat sealing assembly for cutting and sealing a seam in a film or layers of film without regard to the length of the seam. The heat sealing assembly includes a heated blade and a plurality of belt conveyors for conveying the film with a desired tracking through the assembly. An adjustable angle blade and slotted film support ramp result in improved sealing of heavier gauge films by increasing the dwell time of the film on the heated blade.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: February 22, 2000
    Inventors: John M. DeFriese, David Gassel
  • Infinite universal sealing assembly
    Patent number: 5603801
    Abstract: An infinite heat sealing assembly preferably for heat sealing a thermoplastic heat-shrinkable plastic film, has a heat sealing assembly for cutting and sealing a seam in a film or layers of film without regard to the length of the seam. The heat sealing assembly includes a heated blade and a plurality of belt conveyors for conveying the film with a desired tracking through the assembly. An adjustable angle blade and slotted film support ramp result in improved sealing of heavier gauge films by increasing the dwell time of the film on the heated blade.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: February 18, 1997
    Inventors: John M. DeFriese, David Gassel