B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 30/08 (2006.01) B65D 30/18 (2006.01) B65D 30/24 (2006.01)
Patent
CA 2372052
The invention relates to a multiwall paper bag that represents an improvement in the field of bags for carrying bulk material, especially particulate or powdered material. The bag has an inner ply of a high performance kraft paper, an intermediate layer or ply of a thin polyethylene secured to the outer surface of the inner ply, and an outer ply of high performance kraft paper that is secured to the intermediate ply. At least one end of the bag is closed during initial formation of the bag. The other end can be left open for filling and subsequent closing, or it can be initially closed and provided with a filling valve. At least the intermediate ply, and preferably the inner ply as well, is microperforated for venting of air during filling. The intermediate ply is secured to the inner ply either by a plurality of longitudinally extending transversely space apart lines of adhesive or the securing adhesive is spread completely over the mating surfaces of the two plies.
Hood Packaging Corporation
Hood Packaging Corporation/emballage Hood Corporation
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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