Abstract: A bulk container bag of flexible fabric is provided with shape retaining flexible fabric strips at the corners to prevent distortion of the filled bag. Each corner is provided with a plurality of shape retaining rectangular strips anchored at their opposed ends to the adjacent side walls and extending across the corner. The strips are mounted one atop the other and spaced apart sufficiently to enable fill material to flow freely in and out of the corners to have complete filling and packing so that the bags will retain their shape even when stacked. The shape of the strips ensure uniform tensile forces on the walls from top to bottom of the strip.

Abstract: An apparatus and method for cleaning used bulk or cargo bags enables a worker to vacuum clean the entire outside of the bag without climbing up and down. An air supply/fill clamp assembly attaches to the fill opening. It inflates and supports the bag. An air exhaust discharge clamp attaches to the discharge opening to carry away interior residue. A power elevation mechanism raises and lowers the air supply/fill clamp assembly under operator control to thereby position the bag at whatever level is most useful to the operator as the outside is being vacuum cleaned with a vacuum cleaner.

Abstract: Releasable fastening devices are provided in spaced-apart locations on the inner surface of the outer bag and in adjacent locations on the outer surface of the inner liner. The adjacent fastening devices are easily connectable together to maintain the liner in conforming condition relative to the outer bag member during both loading of material into the cargo container and unloading of material from the cargo container. The releasable fastening devices are also easily separable to premit removal of the liner from the outer bag member.

Abstract: Four pairs of lifting panels extend upwardly from and have their lower end portions formed integrally with the upper edges of the side walls of the cargo bag. Each of the four pairs of lifting panels includes a pair of adjacent lifting panels positioned adjacent a corresponding corner of the cargo bag and the upper end portions of the lifting panels are folded inwardly to form multi-plies thereof. The multi-ply upper end portions of adjacent lifting panels are positioned in overlapping relationship and are interconnected to form a lifting loop above each corner of the cargo bag for supporting and moving the cargo bag from one location to another.

Abstract: Four triangular lifting panels are formed integrally with and extend upwardly from the upper edges of the side walls of the cargo bag. Each of the triangular lifting panels includes wide lower ends, inwardly tapering sides, and substantially pointed upper ends with the wide lower ends of the triangular lifting panels being integrally joined with at least one-half of the upper edges of at least two of the side walls on opposed sides of the cargo bag. In one embodiment, pairs of triangular lifting panels are formed integrally with opposed side walls so that the lifting stress is equally distributed to opposed side walls. In another embodiment, the four triangular lifting panels are formed integrally with and centered above the juncture of adjacent side walls so that the lifting stress is equally distributed to all four side walls. Lifting loop means is associated with the lifting panels for supporting and moving the cargo bag from one location to another.