Cardboard blank for a gas-tight and liquid-tight folding box

Details Cardboard blank for a gas-tight and liquid-tight folding box Cardboard blank for a gas-tight and liquid-tight folding box

B - Operations, Transporting

65

D

229/16.1

B65D 5/56 (2006.01) B65D 5/06 (2006.01) B65D 65/40 (2006.01)

Patent

CA 1053630

Abstract of the Disclosure A cardboard blank is provided for making up into a gas-tight and liquid-tight box. The blank has a lining of aluminum foil on its inside and a layer of heat sealable synthetic material covering the entire foil-covered surface of the blank. Between the foil and this layer, in the seam areas, and preferably also in the corner areas, additional layers of heat sealable synthetic material are provided. The provision of these additional layers in the areas of maximum stress (corners and seams) enables one to minimize the thick of overall layer.

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