Abstract: A zipper strip for a reclosable bag or package includes a male interlocking profile and a female interlocking profile. The male interlocking profile includes a male interlocking member and a male web coextruded therewith. In like manner, the female interlocking profile includes a female interlocking member and a female web. The male interlocking member snappingly engages into the female interlocking member to join the profiles to one another. One of the male and female webs is wider than the other in at least one of two directions from the male and female interlocking members, the greater width being represented by at least one flange extending widthwise beyond the other web. The zipper strip is designed to be attached to thermoplastic sheet material by sealing the at least one flange thereto without sealing the male and female webs to each other. Methods for securing the zipper strip to thermoplastic sheet material, and for making packages on a horizontal form-fill-and-seal machine, are also disclosed.

Abstract: A reclosable plastic bag (10a, 10b) having a front wall (12) and a rear wall (14), opposed sides (16, 18) and an open top end (24) has a zipper (22) extending across the front and rear walls (12, 14) from side to side at the bag top. The zipper (22) includes first and second profiles (17, 19) having mating interlocking portions (26, 28). A camber inducing member (30, 32) is provided at the bag top on at least one of the profiles (17, 19) or the front and rear walls (12, 14) to urge the top end of the front wall (12) away from the top end of the rear wall (14) when the mating interlocking portions are disengaged from one another.

Abstract: A reclosable plastic bag (10a, 10b) having a front wall (12) and a rear wall (14), opposed sides (16, 18) and an open top end (24) has a zipper (22) extending across the front and rear walls (12, 14) from side to side at the bag top. The zipper (22) includes first and second profiles (17, 19) having mating interlocking portions (26, 28). A camber inducing member (30, 32) is provided at the bag top on at least one of the profiles (17, 19) or the front and rear walls (12, 14) to urge the top end of the front wall (12) away from the top end of the rear wall (14) when the mating interlocking portions are disengaged from one another.

Abstract: A zipper strip for a reclosable bag or package includes a male interlocking profile and a female interlocking profile. The male interlocking profile includes a male interlocking member and a male web coextruded therewith. In like manner, the female interlocking profile includes a female interlocking member and a female web. The male interlocking member snappingly engages into the female interlocking member to join the profiles to one another. One of the male and female webs is wider than the other in at least one of two directions from the male and female interlocking members, the greater width being represented by at least one flange extending widthwise beyond the other web. The zipper strip is designed to be attached to thermoplastic sheet material by sealing the at least one flange thereto without sealing the male and female webs to each other. Methods for securing the zipper strip to thermoplastic sheet material, and for making packages on a horizontal form-fill-and-seal machine, are also disclosed.