Patent ID: 6910805

Claim:
A package comprising: first and second walls; and a flexible zipper comprising first and second zipper parts that are mutually engageable to close said zipper and disengageable to open said zipper, said first zipper part comprising a first profiled closure element and a first flange having a first length, and said second zipper part comprising a second profiled closure element that is interlockable with said first closure element and a second flange having a second length greater than said first length, wherein a longitudinal portion of said first flange is joined to said first wall at a first seal, a first longitudinal portion of said second flange is joined to said first wall at a second seal, a second longitudinal portion of said second flange is joined to said second wall at a third seal, and a third longitudinal portion of said second flange is joined to said second wall at a fourth seal, said second seal being below said first seal, and said third seal being below said fourth seal, said second flange comprising a web of thermoplastic material having first and second sides, said second through fourth seals being on said first side of said second flange.