Device for producing extrusion-coated laminates
CA 2084913 A1 · Owner: Christel, Andreas · Inventors: Christel, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes a device and a process for producing extrusion-coated laminates. The extrusion device contains an extruder nozzle with nozzle lip a, cooling roller and a contact roller wherein the cooling, roller and the contact roller form a roller gap and the extruder nozzle is directed towards the roller gap. A melt of thermoplastic plastics, which enters the roller gap while forming a coating film and is joined to a substrate film in the roller gap, emerges from the nozzle lip. A device for improving the adhesion of the coating film to the substrate is thus disposed in the region between the extruder nozzle and the roller gap at a slight distance from the film. The device is a …
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 December 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2014.
- 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.