Method and device for drying a coating on a paper web or equivalent
CA 2188702 C · Owner: Valmet Corporation · Inventors: Karlstedt, Bertel; Heikkila, Pertti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for drying a coating on a paper web or equivalent in which the direction of running of the paper web is turned free of contact, by blowings produced by a turning device and the coating on the paper web is dried free of contact by blowings of drying devices placed at both sides of the paper web. The direction of running of the paper web is turned by drying blowings. The exhaust air of the turning device and drying device which is placed at the side of the turning device is removed from direct vicinity of the paper web or equivalent by a common exhaust device. The turning device and drying device are placed under and within a common box construction so that access of the …
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 October 24, 1996 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2018.
- 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.