Method and device in the drying section of a coating machine or equivalent
CA 2012615 C · Owner: Heikkila, Pertti · Inventors: Heikkila, Pertti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for use in web drying apparatus such as a drying, section of a coating or paper machine which includes drying cylinders against the outer mantles of which a web to be dried is pressed in direct contact, and wherein the web is carried from one drying cylinder to the next supported on a wire which passes from a drying cylinder over an intermediate leading cylinder where the web is carried on the outer side of the wire out of direct contact with an outer mantle of the leading cylinder and then to the next, drying cylinder, comprises the steps of maintaining a negative pressure in a pocket space defined between a pair of successive drying cylinders and the web-supporting wire for …
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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 March 20, 1990 and granted February 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2012.
- 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.