Method and apparatus for influencing the thickness and gloss and/or smoothness in the treatment of fiber material webs
CA 2125107 C · Owner: Sulzer-Escher Wyss Gmbh · Inventors: Schneid, Josef; Stotz, Wolf Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is described for influencing the thickness and gloss and/or smoothness in the treatment of fiber material webs in at least one press gap formed by rolls wherein at, least one adjustable deflection roll is used and a plurality of correction sections is provided over the press gap length which can be influenced in differential manner with respect to temperature and/or pressure, wherein for the decoupling, of the two correction procedures the pressing force changes threatening in the correction sections of the relevant press gap through local changes in diameter of the relevant roll resulting from changes of the surface temperature are at least substantially prevented by means of …
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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 June 3, 1994 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 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
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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.