Web embossing machine
CA 2003276 C · Owner: Fabio Perini S.P.A. · Inventors: Biagiotti, Guglielmo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The web embossing machine of the present invention has two embossing cylinders brought close to one another for combining two paper webs by the pressure contact between mutually corresponding protrusions on the two cylindrical surfaces. The protrusions are in rows which present a pattern inclined relative to the axes of the respective cylindrical surfaces, i.e. in a helicoidal fashion and relative to a plane passing at right angle through said axes, and thus achieve a subsequent and progressive contact instead of a simultaneous contact throughout the row. The inclination relative to a plane passing at right angle through the cylinder axis avoids repetitive pressure actions on the pressure …
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 November 17, 1989 and granted June 29, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2011.
- 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.