Process for the thermomechanical treatment of a fleece web of thermoplastic synthetic resin and an apparatus for carrying out the process
CA 2191364 C · Owner: Reifenhauser Gmbh & Co. Maschinenfabrik · Inventors: Schulz, Herbert; Kunze, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the thermomechanical treatment of a fleece web which is comprised of filaments and/or fibers of a thermoplastic synthetic resin in a continuous process. The fleece web is moved during the thermal treatment continuously and with uniform speed. The fleece web passes initially a thermal treatment station and in this is traversed by a gas stream of predetermined gas flow velocity and gas flow temperature and is heated to a preheating temperature. The preheated fleece web is subjected to mechanical treatment. The gas flow temperature and the gas flow velocity on the one hand and the treatment stretch of the fleece web in the thermal treatment station on the other are so selected …
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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 July 20, 1996 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.