A method and an apparatus for recycling different components in a multiple layer material
CA 2258968 A1 · Owner: Cellwood Machinery Ab · Inventors: Betz, Gunter; Kurtz, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of recovering the different components of multiple layer materials for instance consisting of pieces (20) of paper plastic and aluminium foil, comprises delivering the material to the infeed zone (4) of a refiner or disperser (2) that includes mutually opposing discs (5; 6) which include material engagement surfaces or material engagement elements (5a; 6a) and which rotate relative to one another. The gap between the discs (5; 6) is adjusted so that the material present therebetween will be subjected to shear forces that result in rapid mutual separation of the various layers of material. Separated pieces (20'; 20'') of the various layers are pumped in the form of a …
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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 June 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2019.
- 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
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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.