Press felt for paper making and a method of manufacturing such a felt
CA 1204316 A · Owner: Tamfelt Oy Ab · Inventors: Lundstrom, Kristian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A press felt for conveying a paper web through a press section of a paper machine and comprising a support fabric (1) formed of a yarn structure and a fibre bat layer (2) formed of fibres and needled to the support fabric at least on one side thereof. The support fabric and the fibre bat layer are filled with a filling material (3) from one surface of the felt to the other so that the felt has an air permeability of less than 0.5 m3 of air/m2 of felt per minute under an air pressure of 100 Pa. The fibre fineness of the fibre bat is preferably at least 6 den. The felt formed by the fibre bat layer and the support fabric is preferably filled from the surface facing the paper with a rubber or …
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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
- Granted May 13, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 2003.
- 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.