Device for sealing and perforating a thermoplastic film
CA 1291309 C · Owner: Soubrier, Pierre · Inventors: Susini, Etienne; Soubrier, Pierre
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 device for the sealing and perforating of a thermoplastic film folded back on itself, driven step by step, and comprising a support movable in a direction perpendicular to the film and heating means carried by the movable support. The heating means comprising two electrical sealing strips conductors of electricity. spaced from each other. Each one of the strip conductor include a part which becomes heated by the passage of an electric current. The device includes perforation means located between the sealing strips pursuant to the invention the sealing strips include a nonheating part the length of which is at least equal to the heating part and placed downstream …
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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
- Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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.