초록 ▼

A resealable package using zipper material and a corresponding method and apparatus are disclosed. In the package, the zipper material beads terminate entirely inboard of the outer periphery of the sealed area. The package is formed by forming a lateral loop in a first one of the webs, positioning t

A resealable package using zipper material and a corresponding method and apparatus are disclosed. In the package, the zipper material beads terminate entirely inboard of the outer periphery of the sealed area. The package is formed by forming a lateral loop in a first one of the webs, positioning the zipper material along the first web crossing the loop substantially at a right angle, cutting the zipper material in the region of the loop, and then straightening the first web, thereby creating a gap between the cut ends of the zipper material, then bonding the second web to the first web to form a package with a sealed area in the gap. In the preferred embodiments of the apparatus, the lateral loop forming means has at least one transversely oriented loop forming bar moveable into and away from corresponding loop forming groove(s) in a table along which one of the webs is advanced. At least one cutter knife above the table is moveable partially into the loop forming groove beneath the guide shoe to cut through the zipper material without cutting through the web material. In one preferred embodiment, the longitudinal distance between loop-forming stations may be varied to accommodate runs of different package sizes.

대표청구항 ▼

A resealable package comprising upper and lower webs defining a product containing area having a periphery between said webs, said webs being continuously sealed to each other around the periphery of the product containing area by a peripheral seal to form a sealed area, and resealable zipper closur

A resealable package comprising upper and lower webs defining a product containing area having a periphery between said webs, said webs being continuously sealed to each other around the periphery of the product containing area by a peripheral seal to form a sealed area, and resealable zipper closure material positioned along one edge of said product containing area, and said one edge having ends said zipper closure material comprising interlocking beads which effect an openable and reclosable seal, in which said zipper closure material terminates short of the ends of said one edge, with the beads positioned within the sealed area and not passing fully therethrough.