Extended nip-press
CA 2011603 C · Owner: Valmet Paper Machinery Inc. · Inventors: Laapotti, Jorma
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extended-nip press for dewatering of a paper or board web, comprising a counter-member (10), which forms an extended press zone (S) together with a press-glide shoe (33) and a glide belt (40) running around the shoe. Through said zone (S) at least one, dewatering fabric (50) and the web (W) from which water is removed and which is supported by said fabric are passed. The glide belt (40) is passed over a leading and tensioning member (43; 70) and the, closed loop of the glide belt (40) is guided around its leading and tensioning member (43; 70) so that, between said leading and tensioning member (43; 70) and the glide shoe (33) and its possible guide parts (33a, 33b), if any, the glide …
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 March 6, 1990 and granted November 29, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2012.
- 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.