초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A method for manufacturing reclosable packages on a horizontal form-fill-and-seal machine, said method comprising the steps of:providing a sheet of thermoplastic sheet material having at regular intervals therealong a length of zipper strip attached transversely across th

[ What is claimed is:] [1.] A method for manufacturing reclosable packages on a horizontal form-fill-and-seal machine, said method comprising the steps of:providing a sheet of thermoplastic sheet material having at regular intervals therealong a length of zipper strip attached transversely across the center thereof and having strips without zipper strip along two lateral edges thereof, said zipper strip having interlocked male and female interlocking profiles, one of said male and female interlocking profiles having a web wider than that of the other on at least one of two lateral sides thereof, the greater width of the wider web being at least one flange running therealong, said one of said male and female interlocking profiles having said wider web being attached to said sheet, and the other of said male and female interlocking profiles not being in contact with said sheet said at least one flange being oriented in a direction of motion of said sheet on said horizontal form-fill-and-seal machine, said at least one flange being sealed to said sheet to attach said interlocked male and female interlocking profiles thereto;providing a product conveyor to deposit a product to be packaged onto said sheet of thermoplastic sheet material;folding said two lateral edges of said sheet of thermoplastic sheet material toward one another and around said product;sealing said two lateral edges of said sheet to one another to form a tube therefrom enclosing said product;sealing said tube transversely to each said length of zipper strip without sealing said webs of said male and female interlocking profiles to each other; andcutting said sealed tube to separate each completed package from the next.