Method of making foil bags
CA 2679229 C · Owner: Kujat, Marcus (Deceased) · Inventors: Stoppelmann, Detlef; Kujat, Marcus (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing film bags which have side folds which are introduced in a V-shape and are recessed from the upper edge and a resealable closure in a top-side opening having the following method steps: a) at least one first flat film strip (3) is produced which comprises stamped-out portions (5) in edge regions; b) side folds (6) are formed by folding the edge regions in a C-shape wherein the stamped-out portions (5) delimit in each case the upper end of the side folds (6); c) resealable closure strips (7) are attached to the film strips (3) transversely with respect to the web direction and the upper edge of the side folds (6) is closed; d) a flat film is …
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 September 9, 2006 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2026.
- 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.