Web slitter and groover system
CA 2008260 C · Owner: Kozbur, Nestor · Inventors: Shankel, Richard; Kozbur, Nestor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method of making a plurality of wound roll products from a web of sheet material moving along a predetermined path of movement each of said roll, products having first and second spaced concentric circular, grooves each formed in an end face thereof said second, groove being located a distance further from the center of rotation of the roll product than said first groove said, apparatus comprising, in combination: a framework; first and second web cutting assembies; first drive means and second drive means for selectively moving said first and second web cutting assembly transverse to said predetermined path of movement; control means; and means for winding said 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 January 22, 1990 and granted September 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 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.