Nozzle arrangement in a blow box of a paper machine
CA 2016679 C · Owner: Eivola, Ilkka · Inventors: Eivola, Ilkka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nozzle arrangement in a blow box of a paper machine comprising one or several nozzles (22a 22b) placed in connection, with the blow box (20) or pipe through which nozzles a blowing of, air can be applied to a moving member in a paper machine placed in their proximity, such as a wire, drying cylinder guide roll, felt, or the equivalent. The blow box (20) and its nozzles (20a 20b) are, at a certain operational safety distance (C) from the moving member. In connection with the nozzle slots of the nozzles (22a 22b) or, nozzle, a respective nozzle flap (24a 24b) pivotable around a, respective transverse hinge shaft (P) is hinged. The nozzle flaps (24a, 24b) respectively guide the blowing of …
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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 May 14, 1990 and granted June 29, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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
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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.