High burst zipper assembly for large reclosable packages
AssigneeIllinois Tool Works Inc.
InventorsDavid J. Anzini, Rusty Koenigkramer, Steven Ausnit
Life of this patent
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Abstract
The present disclosure relates to a high burst slider zipper which allows for bottom filling of reclosable packages, such as large bags, and further provides increased resistance to damage from the dropping or shock loading of the filled package. This is achieved by providing a peel seal or other frangible or separable connection between the zipper profiles, and by sealing a portion of one of the flanges to itself by a hard seal above the peel seal. This causes the external forces on a bag from bottom filling or shock loading to be directed toward the hard seal and further directed so as to cause a shear force against the peel seal, thereby increasing the resistance of the package to external forces.
Claims6
A zipper assembly for a reclosable package, including:
- a first profile with a first flange and a first interlocking element;
- a second profile with a second flange and a second interlocking element;
- a portion connected to the second flange by a hard seal and extending toward the first flange;
- a peel seal formed between the first flange and the portion, wherein the peel seal is more resistant to a shear force than to a peeling force;
- and
- wherein a load on the first and second flanges applies a shear force to the peel seal.
Dependencies are inferred from the claim text.