Heat sealing of carton blanks in constructing or closing cartons
CA 2073228 A1 · Owner: Tetra Laval Holdings & Finance S.A. · Inventors: Mosse, Richard W. E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carton packing machinery for the construction or closing of cartons including a heater for effecting heating in heat sealing operations. The heater comprises a nozzle with jets which direct heated gas on to portions of carton material intended too be sealed together. The jets direct the hot gas obliquely on to the material so that the areas to be heat sealed together can be more precisely defined compared to jets which direct hot gas transversely on to the material.
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 July 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2014.
- 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.