Patents Assigned to Packaging Corp. of America
  • Packaging tab
    Patent number: 5518133
    Abstract: A cover for a packaging arrangement, comprising a side flange having an undercut disposed therein for releasably engaging a base of said packaging arrangement; and a non-planar shaped tab having a first edge connected to said side flange along the length of said first edge and having a second edge connected to said side flange only at the terminating points of said second edge, said undercut extending in a continuous, unbroken manner in the vicinity of said tab.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: May 21, 1996
    Assignee: Packaging Corp. of America
    Inventors: Thomas J. Hayes, Stephen A. Smith