Press felt structure and method of manufacturing press felt
CA 2429662 A1 · Owner: Rehakka, Heikki · Inventors: Rehakka, Heikki; Hyvonen, Kari; Virtanen, Tauno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of manufacturing a press felt a press felt , and a base fabric. The press felt comprises a base fabric (2) with a batt fibre layer (1) attached on at least the surface facing a paper web. The base fabric is a laminate comprising at least two separate layers (4 to 6; 11 12). , For the base fabric, one or more base fabric modules (14 to 16) are provided which are assembled with a butt seam into a closed loop. According to one preferred embodiment, at least two different connecting portions (22 to 24) of different lengths are provided at the jointing edge of the module from the different layers of the base fabric, which connecting portions are inverted …
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 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2023.
- 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.