| 摘要 |
A package comprising a container provided at its open top with a flange having portions of concave-convex configurations, a lid provided at the edge with a flange having portions of convex-concave configuration elastically interengaged with the concave-convex portion of the flange at the top of the container so as to mechanically lock the lid to the container and said lid being reinforced by a relatively stiff cover board die-cut to fit into the concave side of the flange at the edge of the lid and wherein portions of the flanges are united by sealing and a method of making the same.
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