Importance

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Abstract

A collapsible bulk bag with lift straps is formed from a tubular blank of material severed from an elongate web of material and is provided with reinforced upper corners integral with the blank. The blank is severed from the web to provide a central portion which forms four rectilinear side walls and triangular portions preferably adjacent each end of the central portion. The adjacent sides of adjacent triangular portions at the lower end of the central portion are connected together to form a bottom of the bag. Each triangular portion at the upper end of the central portion is folded over and disposed with its base along the upper edge of two adjacent side walls and its apex generally collinear with the juncture of the adjacent side walls. Each of these triangular portions is folded down onto the bag to overlie a portion of the adjacent side walls providing a double layer of material adjacent the upper corners of the bag, where the lift straps are attached to the sidewalls and overlying triangular portions, to increase the load bearing capacity of the attachment of the lift straps to the bag and of the bag.

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First Claim