A method and a machine for making packaging bags using a flexible film, and a packaging bag obtained thereby
CA 2210774 C · Owner: Bois, Henri · Inventors: Bois, Henri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of automatically forming, filling, and closing reclosable packaging bags based on a film (1) of flexible material e.g. a thermoplastic material, provided with added-on strips (110, 112) and in particular complementary male and female slideway closure strips, the method comprising the steps consisting in: providing a feed of flexible film (1); providing a feed of strips (110 112); and, fixing the strips (110, 112) on the film (1) by heat sealing; characterized by the fact that: the step of feeding strips consists in providing a tape (100) of flexible material carrying the complementary strips (110 112); and the step of fixing consists in heat sealing …
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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 July 17, 1997 and granted June 26, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2019.
- 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
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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.