Patents Examined by Matt Luby
  • Patent number: 6126584
    Abstract: A method of forming a paper container uses a three ply corrugated material having at least one inner or outer sheet of paper that may be stretched or compressed circumferentially to permit subsequent rolling of the corrugated material about a mandrel. A flattening of the upper and lower edges of the corrugated material permit rolling and seaming operations to be used to assemble the bottom to the cup and to form a lip in the upper edge.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: October 3, 2000
    Inventor: Robert B. Zadravetz