Patent ID: 7540072

Claim:
A zipper including: a first interlocking profile including a first flange; a second interlocking profile including a second flange; the first and second flanges including respective first and second exterior surfaces for sealing to respective first and second package walls, and each of the first and second exterior surfaces including a plurality of spaced apart outwardly protruding ribs for enhancing sealing with the respective first and second package walls; the first and second flanges including respective first and second interior surfaces, the first and second interior surfaces including respective first and second pluralities of inwardly protruding strips, wherein the first plurality of inwardly protruding strips abuts the second plurality of inwardly protruding strips during sealing of the first and second exterior surfaces to the respective first and second package walls and wherein the first and second pluralities of inwardly protruding strips improve resistance to the first and second interior surfaces sealing to each other during sealing of the first and second exterior surfaces to the respective first and second package walls; and wherein the ribs and the strips are formed opposite each other on the first and second flanges.