Method and wire group in a dryer section provided with a single-wire draw
CA 2097436 C · Owner: Valmet Paper Machinery Inc. · Inventors: Kuhasalo, Antti
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 and a wire group in a drying section provided with single-wire draw in a paper machine or paper finishing machine. A paper web to be dried is passed on support of a drying wire alternatingly over heated cylinder faces of drying cylinders and over leading rolls or other equivalent drying cylinders. The paper web is pressed into direct contact against the heated cylinder face of the drying cylinders and on the, leading rolls, the paper web is placed on the outside face of the drying-wire loop at a side of the outside curve. In the invention the difference in speed of the paper web which the paper web would have during operation of the drying section on the …
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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 June 1, 1993 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2015.
- 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.