A method of and an apparatus for transferring a fast running ready-dried fibrous web, especially a tissue web, from one device and along a predetermined run to a subsequent device
CA 2229275 C · Owner: Valmet-Karlstad Ab · Inventors: Svanqvist, Tord O.S.; Ortemo, B. Lennart H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To accomplish a web transfer, which in reliability is comparable to the one obtained with a closed draw, in any operating environment but especially , where it is desirable to transfer a fast running tissue web (4) from the drying section of a tissue machine, e.g. a yankee dryer (2) to a reel-up , (3), a web support device (10) extends across the width of the web (4) and along a predetermined run of the web (4) from the yankee dryer (2) to the reelup (3). The web support device has a support surface (11) formed by a series of plate member assemblies (23) having means for creating a flow of air in the direction of the web run. Between the web (4) and the support surface (11) the flow …
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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 September 10, 1996 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 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.
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.