Method in the drying of a paper web and a dryer section of a paper machine
CA 2133604 A1 · Owner: Yli-Kauppila, Jouko · Inventors: Yli-Kauppila, Jouko; Kerttula, Reima
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
57) Abstract, Method and dryer section in contact drying of a paper web (W). The paper web (W) is dried by means of heated smooth-faced drying cylinders (10 20A,20B) by using a number of successive so called normal groups (R1...RN) with single-wire draw in, which the drying cylinders (10) are placed in the upper row and the reversing suction cylinders (11) in the lower row. After the press section of the paper machine, the paper web (W) is dried initially in a number of successive groups (R1...RN) with single-wire draw by pressing the paper web (W) by means of the drying wire (15) of the cylinder group against the heated faces of the drying cylinders (10) and by, in each group (R1...RN) …
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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 October 4, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 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.