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US 7,410,453 B2Granted
Method of sealing a zipper with concave bridges or bases using convex sealing bars
AssigneeIllinois Tool Works Inc.
InventorsEric Fenzl, Gregory Crunkleton
Life of this patent
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Abstract
The present invention includes a method and apparatus wherein webless zipper is provided with concave seal bridges. These concave seal bridges are complementary in shape to convex sealing bars. This captures or positions the seal bridges of the zipper profiles resulting in improved alignment of the profiles and improved performance of the manufacturing apparatus.
Claims20
A method of sealing zipper profiles to a web, including the steps of:
- providing a zipper including first and second profiles, the first and second profiles including respective first and second interlocking elements and first and second concave bridges;
- providing web material;
- providing first and second convex sealing bars which urge the web material against the concave bridges;
- and
- sealing the first and second concave bridges to the web material by the convex sealing bars.
2 more elements
A method of sealing zipper profiles to a web, including the steps of:
- providing a zipper including first and second profiles, the first and second profiles including respective first and second interlocking elements and first and second concave bases;
- providing web material;
- providing first and second convex sealing bars which urge the web material against the concave bases;
- and
- sealing the first and second concave bases to the web material by the convex sealing bars.
2 more elements
Dependencies are inferred from the claim text.