Application of zipper lengths to a web
CA 2694087 C · Owner: Illinois Tool Works Inc. · Inventors: Leighton, Murray Edward Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus comprises a rotary turret 18 having circumferentially spaced grooves 30a 30b, 30c for receiving pre-cut lengths of zipper 58 consisting of first and second interengageable profile strips. Sliders 46 for engaging and re-engaging the profiles are mounted on the zipper lengths by a rotary slider applicator 42. A web 12 of plastics material is fed beneath the turret 18 and receives the zipper lengths which are secured to the web by a heated sealing bar 60. The web with zippers attached is fed to a form-fill-seal machine 20 on which the web is formed into individual bags which are filled and separated from one another.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 22, 2005 and granted January 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.