Patents by Inventor Alan L. Rentmeester

Alan L. Rentmeester 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).

  • Rotary film sealing and severing head for thermoplastics
    Patent number: 4909016
    Abstract: A rotary film sealing and severing device for use with thermoplastic film for forming packages. The device includes a rotating anvil assembly and a counter-rotating film cutting assembly having a heated sealing and cutting knife. First and second liquid cooled clamping bars on either side of the knife hold the layers of film together while the film is being sealed and cut. Cooling the clamping bars prevents the film from adhering to the clamps and causes the layers of film to quickly fuse together and allows high speed operation by preventing separation of layers of film due to slow cooling.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: March 20, 1990
    Assignee: FMC Corporation
    Inventors: Alan L. Rentmeester, John M. Pamperin
  • Rotary film sealing and severing head for thermoplastics
    Patent number: 4840009
    Abstract: A rotary film sealing and severing device for use with thermoplastic film for forming packages. The device includes a rotating anvil assembly and a counter-rotating film cutting assembly having a heated sealing and cutting knife. First and second liquid cooled clamping bars on either side of the knife hold the layers of film together while the film is being sealed and cut. Cooling the clamping bars prevents the film from adhering to the clamps and causes the layers of film to quickly fuse together and allows high speed operation by preventing separation of layers of film due to slow cooling.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: June 20, 1989
    Assignee: FMC Corporation
    Inventors: Alan L. Rentmeester, John M. Pamperin