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US 7,731,425 B2Granted
Polywoven pinch bottom open mouth bag
AssigneeStandard Multiwall Bag Manufacturing Co.
InventorsPaul Lin, Yuming Pang
Life of this patent
Estimating the term…
Abstract
A pinch bottom open mouth bulk material bag fabricated from polywoven material has closures at one or both ends that are non-sewn and which comprise a strip of tape running in the cross-bag direction. The tape is folded over the respective bag end, which may be modified, and is glued in place to close the end. The closure has no holes or other openings through which contaminants may enter the bag interior.
Claims6
A bulk material bag comprising:
- a polywoven bag body having an open end, said bag body having a longitudinal bag axis and the open end having an end edge transverse to the bag axis, said bag body including opposed lateral side edges defining a bag front panel and a bag rear panel;
- a tape extending transverse to the bag axis and adhered to the bag rear panel so that a portion of the tape extends beyond the end edge to define an exposed portion of said tape, wherein adhesive is applied to said exposed portion, and wherein the bag front panel is slit at each lateral side edge to define a flap and the flap is folded over and adhered to the front panel.
Dependencies are inferred from the claim text.