Wet end, method for the production of a fibrous material web and use of wet end
CA 2247085 A1 · Owner: Kraft, Wilfried · Inventors: Meschenmoser, Andreas; Mayer, Wolfgang; Mohrhardt, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a wet end (10) of a paper or board machine and a method for the production of a fibrous web. The wet end section (10) has a twin-wire section (US), into which two wires (16 18) are guided approximately , parallel to each other and into which a fibrous material suspension (27) is introduced. The twin-wire section (US) is looped around a roller (22). At the roller (22), means (30, 32, 38) are provided for immobilizing the fibrous material suspension in the twin-wire section (US) and forming of the fibrous web. In addition, the wet end has means (32 34, 36; 34, 36, 66) for the , further draining of the fibrous web. The roller (22) is a combined forming 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 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2019.
- 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.