Method of using a web cutting device
CA 2174986 C · Owner: Valmet Corporation · Inventors: Mannio, Aaron
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A web cutting device and method for cutting a web in which a an actuator acts upon a cutter blade so as to produce the cutting stroke. The actuator includes several cylinders placed inside a container or alternatively a number of cylinders placed individually in a plurality of containers. Each of the cylinders includes a piston and a piston rod, the piston rods being attached to the cutter blade with a certain spacing along the length of the cutter blade in a direction transverse to the running direction of the web.
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 April 25, 1996 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2018.
- 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.