Manufacturing three dimensional surface structure web
CA 2474489 C · Owner: Voith Patent Gmbh · Inventors: Beck, David; Herman, Jeffrey; Scherb, Thomas Thoroe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method for manufacturing a fiber web (12) in particular a web of tissue , or , hygiene material provided with a three dimensional surface structure the , fiber web is , pressed at a dry content of less than 35% in particular less than 30%, and , preferably less than 25% onto an imprinting fabric (14) by a first pressure field and is thereby , pre-imprinted, and in which the fiber web is guided through at east one pressure field , (third pressure field) provided for dewatering and or drying said fiber web. Preferably, the fiber web is once more pressed onto an imprinting fabric by means of a second , pressure field in order to fix strength without destroying the three dimensional …
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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 January 24, 2003 and granted April 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2025.
- 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.