Composite board structure and a method of and an apparatus for producing the board structure
AssigneeNissan Motor Co., Ltd.
InventorNorio Kazama
Life of this patent
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Abstract
A composite board structure comprising a corrugated fiberboard and a facing web which is attached to the outer face of a liner of the corrugated fiberboard by means of a layer of a hot melt adhesive material between the liner and the facing web, the liner being formed with perforations and the layer of the hot melt adhesive material having embossed spot portions respectively filling in the perforations in the liner. Such embossed spot portions are formed by building up a partial vacuum in the open spaces between the layer of the hot melt adhesive material and the corrugated paper medium forming part of the corrugated fiberboard.
Claims9
A composite board structure comprising:
- a corrugated fiberboard having at least one liner and at least one corrugated paper medium bonded at the tops of its ridge portions on one side of the paper medium to the inner face of the liner by means of a first layer of a thermoplastic adhesive material, and a facing web securely attached to the outer face of said liner by means of a second layer of a thermoplastic adhesive material, wherein said liner is formed with a plurality of perforations and wherein the second layer of the thermoplastic adhesive material is integral with said first layer of the thermoplastic adhesive material through said perforations and has embossed portions respectively filling in said perforations and coalescing with said first layer of the thermoplastic adhesive material through said perforations.
Dependencies are inferred from the claim text.