Leak-proof closure for cardboard container

A reclosure device adapted for installation on a cardboard container having side walls and end walls connected to form a rectangle in cross-section, said side walls being held together along upper edges of the container and said end walls being held together along upper edges of the container and said end walls being folded between and attached to said side walls, said reclosure device comprising:

• an elongated track member having spaced apart side portions adapted for attachment to said upper edges of said container side walls, said spaced apart side portions of said track member each having an outer surface with a guide means extending along said outer surface for substantially the full width of said carton side walls, said track member including a web portion interconnecting said side portions for approximately one half of its length;
• an elongated slider member mounted on and parallel to said guide means, said slider member having opposed jaw portions along its length with edge means which are in contact with and slidable relative to said guide means;
• and
• stop means at opposite ends of said guide means for retaining said slider member on said track member.