Press section and permeable belt in a paper machine
CA 2554396 C · Owner: Walkenhaus, Hubert · Inventors: Herman, Jeffrey; Silva, Luiz Carlos; Walkenhaus, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressing arrangement comprising at least one first permeable fabric which is a structured fabric to permit the production of tissue paper in a less , expensive structure and operation costs which provides the same web quality as the TAD process. The pressing arrangement further comprises at least one second permeable fabric, a paper web disposed between the first and second fabrics, a pressure producing element in contact with the at least one first fabric and a support surface of a supporting structure in contact with the , at least one second fabric. A differential pressure is provided between the first fabric and the support surface and acting on the at least one first fabric, …
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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 December 23, 2004 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.