초록 ▼

The invention is a shipping container blank whereby all surfaces and edges are sealed by an overlying a plastic film material. A container subsequently made from the blank is rendered highly water resistant. The film material is applied to both sides of the blank and severed from the supply source.

The invention is a shipping container blank whereby all surfaces and edges are sealed by an overlying a plastic film material. A container subsequently made from the blank is rendered highly water resistant. The film material is applied to both sides of the blank and severed from the supply source. The covered blank is then heated above the softening point of the film. The film becomes bonded to the surfaces of the blank and sags around the edges and into any openings so that the film on the two sides of the blank come into contact and are sealed to each other. The edges and any slits and cutouts are then trimmed, as by a die cutter, while preserving the seals along the edges. Containers made by the process can generally be recycled, in contrast to wax or resin impregnated corrugated board.

대표청구항 ▼

1. A moisture resistant corrugated shipping container blank which comprises a corrugated paper shipping container blank completely encapsulated within a thermoplastic film, said blank having slits for forming the blank into a container and cutouts providing ventilation for the container contents, th

1. A moisture resistant corrugated shipping container blank which comprises a corrugated paper shipping container blank completely encapsulated within a thermoplastic film, said blank having slits for forming the blank into a container and cutouts providing ventilation for the container contents, the plastic film completely enclosing all exposed edges of the blank and the edges of the slits and cutouts in order to prevent moisture entry, the slits and cutouts being open with the seals around their edges remaining intact.