Method and device for ensuring the run of the web in the multi-cylinder dryer of a papermachine
CA 2118307 C · Owner: Eskelinen, Pekka · Inventors: Eskelinen, Pekka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The multi-cylinder dryer of a papermachine comprises a first tier of cylinders wherein, a web (W) travels supported by a first dryer wire (k1) on the cylinders (1) of the tier of cylinders as well as a second tier of cylinders, wherein the web (W) travels supported by a second dryer wire (k2) on the cylinders (2) of the tier of cylinders. Upon passing around its wire guide roll (h1;h2), each dryer wire (k1,k2) forms a loop having at least one section (c - d), along which said wire (k1;k2) is free from the run of the web (W) and which in the wire traveling direction is immediately upstream of a point (d), at which the wire is received on the guide roll (h1;h2). Along a wire section (a - d) …
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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 February 19, 1993 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2015.
- 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.