| 摘要 |
A method and blank for forming an overwrapped package that is impervious to atmospheric moisture and vapor. The package is formed from a blank having a substratum of relatively stiff package-forming material on the exterior of which is secured a protective sheeting of moisture impervious material that is secured to the substratum by an adhesive of low melting point that is likewise moisture impervious and may be delaminated from the substratum by the application of heat. The method includes the steps of delaminating areas of the blank, folding the substratum of the delaminated area away from the sheeting and then folding the delaminated sheeting against the exterior of an adjacent portion of the blank.
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