Valved sack

Details Valved sack Valved sack

B - Operations, Transporting

65

D

220/4

B65D 30/24 (2006.01)

Patent

CA 1231682

Abstract A sack is constructed from a thermoplastic film of which the side portions are brought into partial overlapping relationship to define a tube section and top and bottom weld seams are applied transversely. A longitudinal weld seam applied within the confines of the region of overlap terminates at a spacing from the top weld seam to define a filling valve passage. The region of overlap contains a longitudinal inner strip of reduced thickness made in one piece with the walls of the sack.

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