Method and apparatus for coating paper board and paper
CA 2288113 A1 · Owner: Kuni, Stefan · Inventors: Paloviita, Petri; Renvall, Stig; Leino, Mika
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for coating a paper or a paper board web (5) comprising spreading coating mix having a solids content of 55 to 75 % on the surface of the web (5) with a nozzle applicator (3 9), levelling and metering , the spread coating mix on the surface of the web by a doctor element (7) capable of producing a high hydrodynamic force on the contacting layer between the doctor element (7) and the web (5) the doctor element (7) being located , downstream of the applicator (3 9) so that the dwell time between the spreading of the coating mix to the metering is 72-2400 ms. The web speed is preferably 100-1000 m/s. A good smoothness and coverage is achieved by this method due to …
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 May 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2020.
- 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.