| 摘要 |
<p>A zipper tape (10) with a narrow band of untreated surface on the leading edges (20,22) of the flanges that permits the tack sealing of the flanges together by noncontinuous sealing bars (30). This prevents the leading edges (20,22) of the flanges from curling or flipping up thereby reducing the tendency of a leading edge of a zipper (10) from jamming as the web moves over the collar of a form fill and seal (FFS) apparatus. <IMAGE></p> |
