| 摘要 |
A blank for a container lid having at least one layer of corrugated material to which liner material is attached on both sides of the corrugated material. The blank has a central panel. There are side panels attached to each side of the central panel by score lines. Each of the side panels is substantially the same length as the central panel side to which it is attached. The central panel has an annular area conterminous with the score lines attaching the side panels. The annular area is crushed, the liners and corrugated material being crushed together.
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