Patent ID: 8215839

Claim:
A closure device for a reclosable plastic bag comprising first and second interlocking fastening strips arranged to be interlocked over a predetermined length, wherein the first fastening strip including a first interlocking member and a third interlocking member and further including a first flexible wing adjacent the first interlocking member and extending from the first fastening strip beyond the height of the first interlocking member and a third wing adjacent the third interlocking member and extending below the height of the third interlocking member; the second fastening strip including a second interlocking member for mating with the first interlocking member and a fourth interlocking member for mating with the third interlocking member, the second fastening strip further including a second flexible wing adjacent the second interlocking member and extending from the second fastening strip beyond the height of the second interlocking member and a fourth wing adjacent the fourth interlocking member and extending below the height of the fourth interlocking member; whereby the first wing engages with the second wing when the first and second fastening strips interlock, the third interlocking member interlocks with the fourth interlocking member before the first interlocking member interlocks with the second interlocking member, and the third wing does not engage with the fourth wing when the first and second fastening strips interlock.