End wall closure for bulk material transport bag
AssigneeBulk Lift International Incorporated
InventorPeter J. Nattrass
Life of this patent
Estimating the term…
Abstract
A flat reusable fill/discharge closure for the end wall (bottom or top) of a cloth bag for transporting bulk materials comprises a flexible tube folded back into itself to form a long inner fill/discharge tube and a short outer closure tube having a length less than the radius of an opening in the bag end wall; the tube fold is sewn into the periphery of the end wall opening of the bag with the closure and fill/discharge tubes projecting outwardly. A flat closure is effected by tying the fill/discharge tube closed, stuffing it into the bag interior, and then closing the closure tube by a drawstring mounted in its outer end.
Claims5
In a bag for transporting bulk materials, of the kind comprising an end wall joined to a plurality of side walls, all formed of strong, flexible material, and having a plurality of lifting loops mounted on the upper edges of the sidewalls, an improved reusable fill/discharge closure comprising:
- an opening of diameter D in the end wall;
- a fill/discharge tube of strong, flexible material having a diameter at least slightly larger than D and having a length L1;
- a closure tube of strong, flexible material having a diameter at least slightly larger than D and having a length L2 no greater than D/2, with L1>L2;
- the fill/discharge tube and the closure tube each having one end secured to the periphery of the outlet opening in the end wall of the bag with the fill/discharge tube disposed inwardly of the closure tube and both projecting outwardly of the end wall of the bag;
- a drawstring disposed in a peripheral pocket in the outer end of the closure tube;
- and tie means for releasably closing the outer end of the fill/discharge tube;
- whereby the closed fill/discharge tube can be stuffed into the interior of the bag through the end wall opening and the drawstring tightened to form a flat openable closure for the end wall opening.
In a bag for transporting bulk materials, of the kind comprising an end wall joined to a plurality of side walls, all formed of strong, flexible material, and having a plurality of lifting loops mounted on the upper edges of the sidewalls, an improved reusable fill/discharge closure comprising:
- an opening of diameter D in the end wall;
- an elongated tube of strong, flexible material having a diameter at least slightly larger than D, folded back into itself to form an inner fill/discharge tube having a length L1 and an outer closure tube having a length L2, with L2 no greater than D/2 and L1>L2;
- the fold end of the tube being secured to the periphery of the opening in the end wall of the bag with the closure tube and the fill/discharge tube projecting outwardly of the end wall of the bag;
- a drawstring disposed in a peripheral pocket in the outer end of the closure tube;
- and tie means for releasably closing the outer end of the fill/discharge tube;
- whereby the closed fill/discharge tube can be stuffed into the interior of the bag through the end wall opening and the drawstring tightened to form a flat openable closure for the end wall opening.
Dependencies are inferred from the claim text.