Controlled vertical axis unwinding method for rolls of web material
CA 2671377 C · Owner: Mcneil, Kevin Benson · Inventors: Mcneil, Kevin Benson; Byrne, Thomas Timothy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for unwinding a vertically oriented roll of web material is disclosed. The roll comprises a lower surface an upper surface and a circumferential surface. The apparatus comprises: at least one drive element adapted to rotate the vertically oriented roll a sensor adapted to measure a tension of the web and a controller adapted to adjust a speed of the web according to the tension of the web. The method comprises steps of rotating the roll determining a desired web tension, and adjusting the speed of the roll according to the desired web tension.
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 October 23, 2003 and granted February 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2025.
- 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.