Flexible bags – Lifting or suspending element – Including reinforcement or stress distribution means...
Patent
1987-01-22
1989-04-18
Weaver, Sue A.
Flexible bags
Lifting or suspending element
Including reinforcement or stress distribution means...
383 20, 383 22, 383 24, 383117, B65D 3302, B65D 3310, B65D 3314, B65D 8822
Patent
active
048221791
ABSTRACT:
Semi-bulk transport bags having wide lifting members, each lifting member formed from a plural layer folded strip of plain fabric woven from flat ribbon tape, of the same type as used for the bodies of the bags; these relatively stiff lifting members are anchored at the tops of the bags, and are positioned to distribute lifting stresses across wide segments of the side panels. One construction uses four lifting loop members, one at each corner of a rectangular bag; the edges of the ends of each loop are overlapped and tacked into the bag corner by the corner seams that join the side panels of the bags, without folding the side panels over the lifting members, materially reducing manufacturing costs. In another construction, using only two lifting members, the ends of each lifting member are anchored into wide vertical hems on just two side panels of a rectangular bag, allowing use of a lighter weight plain fabric material for the other two side panels without sacrifice of bag strength. In yet another construction using four lifting members, the opposite ends of each lifting member are attached to top portions of the side panels of the bag body but spaced from each other; variations include a rectangular bag and a generally circular bag. Each lifting member is formed with a single twist to stiffen the lifting member and to equalize load stress when the bag is lifted.
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Bulk Lift International Incorporated
Weaver Sue A.
LandOfFree
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