Patent ID: 7942577

Claim:
A flexible bag comprising at least one sheet of flexible sheet material assembled to form a semi-enclosed container having an opening defined by a periphery, said opening defining an opening plane, said bag having a drawtape closure for sealing said opening to convert said semi-enclosed container to a closed container, an upper region adjacent to said drawtape closure and a lower region below said upper region, wherein the sheet material of said drawtape closure exhibits an elastic-like behavior along at least one axis, the sheet material of said drawtape closure comprising: at least a first region and a second region, said first region and said second region being comprised of the same material composition and each having an untensioned projected pathlength, said first region undergoing a substantially molecular-level deformation and said second region initially undergoing a substantially geometric deformation when said sheet material is subjected to an applied elongation in a direction substantially parallel to said axis in response to an externally-applied force upon the sheet material of said drawtape closure, wherein said first region and said second region are visually distinct from one another, and wherein said sheet material includes a plurality of first regions and a plurality of second regions comprised of the same material composition, a portion of said first regions extending in a first direction while the remainder of said first regions extend in a direction perpendicular to said first direction to intersect one another, said first regions forming a boundary completely surrounding said second regions.