Apparatus for drying a fibre web
CA 2129263 A1 · Owner: Valmet Paperikoneet Oy · Inventors: Haavisto, Seppo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drying apparatus for drying a fibre web (5) between two air-tight bands (1, 2) moving in the same direction One band (1) is heated by hot steam and the other band (2) is cooled by water and the fibre web (5) is passed through a drying zone formed by the bands (1, 2) with at least one felt or wire (3, 4) so that the fibre web (5) 16 in contact with the surface of the heated band, and the felt or wire (3, 4) is between the fibre web (5) and the cooled band (2). In the invention the drying zone and the water chamber (14) cooling the lower band (2) are in communication with each other for controlling the pressure difference between them by a simple connection, such as a pipe (25) opening at a …
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 August 1, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 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.