An arrangement in a dryer for a fibre web
CA 2114469 C · Owner: Valmet Corporation · Inventors: Lehtinen, Jukka; Ilomaki, Jari; Rautakorpi, Paavo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement in a dryer for a fibre web for sealing bands (5a, 5b) that move between a chamber (3) containing pressurized vapour and a chamber (1) containing pressurized water and transport a web (7) arid a felt (8) between them, and also for sealing the edges of the chambers (1, 3). The arrangement comprises a closed recovery chamber (16) into which the edges of the bands (5a, 5b) extend and in which the vapour escaping from the vapour chamber (3) from between the band (5a) and the seals (9, 10) and the water escaping from the water chamber (1) from between the band (5b) and the seals (12, 13) gather, whereby the vapour and water can be discharged from the recovery chamber (16) such …
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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 28, 1994 and granted January 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.