Method of and an arrangement for passing a fibre web from a wire through a press section
CA 2006317 C · Owner: Valmet Paper Machinery, Inc. · Inventors: Stenvall, Jouko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an arrangement for passing a fibre web (25) from a wire (3) of a former (1) through a press section (2) comprising at least three nips (N1 N2, N3). The method comprises transferring the web (25) from the wire (3) onto a first press felt (7) and passing it through the nips (N1, N2, N3) so that it is all the time from the separating point of the web (25) and the wire (3) at least up to the third nip (N3) supported on both sides and in contact with at least one felt (7, 13, 18) acting as a support element. The arrangement comprises press rolls (6 8, 12, 15, 16) forming at least three nips (N1 N2, N3), and at least one press felt (7 9, 13, 18) for each, nip (N1, N2, N3), and …
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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 December 21, 1989 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.