A press with extended press zone in a paper machine
CA 2032785 C · Owner: Metso Oyj · Inventors: Kinnunen, Jukka; Lehtonen, Jarmo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A press with extended press zone in a paper machine, comprising a rotating press roll (1) a, press shoe (2), and a slide band (7) sliding along the surface of the press shoe, a web (6) being passed between felts (4, 5) through the press, where it is pressed between the roll (1) and the slide band (7). The press shoe (2) designed to operate hydrodynamically, has a surface provided with a pocket area (d) formed by one or more pockets of small average thickness. If required pressurized lubricant can be introduced to the pocket area to achieve the desired press effect and speed.
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 December 20, 1990 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.