| 摘要 |
An article of insulation and its method of manufacture, in which a planar sheet member has a plurality of score lines (24-24) made in the exterior surface thereof, and is then folded along the score lines (24-24) and then sealed to form an enclosed, airtight volume. Positioned between the upper and lower portions (12,14) of the sheet member are a plurality of thin, flexible, resilient, spaced interior elements (36-36). The combination is deformed to form corrugated surfaces and then expanded so that the upper and lower portions are spaced apart and the interior elements are again substantially flat. The space between the upper and lower elements is evacuated.
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