Paper-making machine reeling operation
CA 2018289 C · Owner: Van Biesen, Franciscus Adrianus · Inventors: Van Biesen, Franciscus Adrianus; English, Christopher James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A centre-wind assist device is employed to improve the quality of jumbo rolls produced during the reeling operation of a paper-making machine. The device applies torque to the winding reel during initial formation of the roll. The application of torque during initial winding of the roll enables the desired paper roll tightness to be achieved, while excessive levels and tension and nip load are avoided.
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 June 5, 1990 and granted February 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.