Method and device for plastic lamination of metal strip by means of direct extrusion
CA 2235903 A1 · Owner: Rasselstein Gmbh · Inventors: Sauer, Reiner; Picker, Eberhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this method for plastic lamination of a metal strip by means of direct extrusion, in which the metal strip is moved in its longitudinal direction, and is heated; by means of a sheet die, a film of molten thermoplastic, plastic material is deposited directly onto one side of the moving metal strip, this plastic film is pressed onto the metal strip, while being led through a gap between two rollers, by which the roller adjacent to the plastic film (laminator roller) is maintained below the melting temperature of the plastic material; if necessary the other side of the metal strip may be coated with a plastic film in similar fashion. While laminating a steel strip the latter is heated to …
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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 27, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2020.
- 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.