Patents Assigned to Rutherford Research, Inc.
  • Machine for sealing cups
    Patent number: 4736568
    Abstract: A web of heat-sealable material is advanced in overlying relation with a row of filled cups to a sealing station where both the web and a cup dwell momentarily. During the dwell period, a head at the sealing station advances downwardly and successively tamps a disc-like portion of the web downwardly into the upper end portion of the cup, seals the outer periphery of the disc-like portion to and around the upper lip of the cup and then severs the disc-like portion from the web so as to leave the cup sealed with a flexible membrane.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: April 12, 1988
    Assignee: Rutherford Research, Inc.
    Inventors: Archie W. Shaw, Stephen P. Johnson