End stops for zippers for reclosable packages
AssigneeIllinois Tool Works Inc.
InventorPer Bentsen
Life of this patent
Estimating the term…
Abstract
The end stop is formed on ends of a zipper for a reclosable package or bag by ultrasonically welding the ends of the zipper profiles together so as to form a raised portion. This prevents the slider from being pulled off of the ends of the zipper. Additionally, in the ultrasonic welding step, an indentation is formed into which glue is added thereby forming a lateral protrusion on the side of a zipper profile. This increases the strength of the end stop and increases the slider pull-off force which can be resisted.
Claims20
A zipper for a reclosable package or bag, comprising:
- a first interlocking profile and a second interlocking profile, wherein the first interlocking profile includes an indentation on a side thereof, the indentation being free of passage through the first interlocking profile;
- and
- end stops formed at ends of the zipper by joining respective ends of the first and second interlocking profiles, the end stops further including a protrusion of glue seated in the indentation and extending laterally from the side of the first interlocking profile.
A zipper for a reclosable package or bag, comprising:
- a first interlocking profile and a second interlocking profile, wherein the first interlocking profile includes an ultrasonically-formed indentation on a side thereof;
- and
- end stops formed at ends of the zipper by joining respective ends of the first and second interlocking profiles, the end stops further including a protrusion of glue in the indentation and extending laterally from the side of the first interlocking profile;
- the end stops further including a ultrasonically-formed portion rising above the zipper, the portion formed from material of the zipper;
- and
- the respective ends of the first and second interlocking profiles being joined ultrasonically.
A zipper for a reclosable package or bag, comprising:
- a first interlocking profile and a second interlocking profile, wherein the first interlocking profile includes an indentation on a side thereof;
- end stops formed at ends of the zipper by joining respective ends of the first and second interlocking profiles, the end stops further including a protrusion of glue in the indentation and extending laterally from the side of the first interlocking profile;
- and
- wherein the end stop can withstand a slider pull-off force of at least 20 pounds.
Dependencies are inferred from the claim text.