Formation of a clamped wave lid seal structure

摘要

A lid (12) is engaged to a container (48) by the formation of interlocking waves of lid material and container material about the interior rim (16) of the container. An unheated clamp head (26) is used to clamp the lid structure immediately adjacent a heated seal head (20) used to form the interlocking wave structure about the inside rim of the container, which prevents melted portions of the container or lid from flowing to or towards the outside rim (18) of the container.