Method and apparatus for sealing a polymer coated paper or board
CA 2552408 C · Owner: Penttilae, Raimo · Inventors: Penttilae, Raimo; Miikki, Nina; Hovikorpi, Jari
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 and an apparatus for jointing members made of plastic-coated paper or board. In accordance with the invention the , sealable members are retained in position with clamps (8) and sealing is performed with a laser sealing means (7) moving along the sealing line a , means (9) for opening the seal point pressing the members apart to continue keeping the seal point open, a laser beam (11) being directed to the open seal point for melting the coating plastic and a means (12) for closing the seal pressing finally the members against each other the plastic jointing the , members when solidified. The method is applicable to lateral sealing of bag or container …
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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 January 12, 2005 and granted October 30, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 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.