Multi-cylinder dryer and twin-wire draw for same as well as web transfer in the gaps between the cylinder groups in said dryer
CA 2004848 A1 · Owner: Autio, Jukka · Inventors: Autio, Jukka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multi-cylinder dryer has upper cylinder (13,14,15,16) and, lower cylinders (10,11,12) over which a paper web (W) to be dried is run in meandering fashion from one cylinder onto the next cylinder The paper web is in direct contact with each drying cylinder within a sector that is larger than 180°, an upper wire (5) and a lower wire (6) are used to press the paper web against faces of the drying cylinders (10,11,12; 13,14,15,16). The wires (6,5) are guided by guide rolls, which are placed in such a way that the paper web (W) is continuously supported by a wire (5,6) as it runs from one cylinder onto the other. The guide roll arrangements consist of fragmentary rolls (21,51), which are …
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 December 7, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2011.
- 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.