Patents Assigned to Heartland Chemicals
  • System for opening and emptying containers
    Patent number: 4265584
    Abstract: A system for distributing granular material to the soil incorporates an enclosure for holding a container while a piercing and flap opening blade assembly is rotated through the wall of the container to tear open a flap at the bottom.
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: May 5, 1981
    Assignee: Heartland Chemicals
    Inventors: Michael J. Duwell, Paul B. Specht