Method and apparatus for automated stripping of zinc sheets from aluminum cathode base plates
CA 2178776 C · Owner: Falconbridge Limited · Inventors: Dagg, John W.; Deluca, David A.; Girard, Gaston A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns a method and an apparatus for automated stripping of electrodeposited zinc sheets from aluminum cathode base plates. This is achieved using a stripping mechanism that has a single pivotable stripping arm assembly linearly movable on the side of a rack of cathodes suspended vertically in parallel alignment with one another. The single stripping arm assembly is automatically moved and positioned in alignment with each cathode and then pivoted so that the knives mounted at the end of the stripping arm assembly wedge between the cathode base plate and the zinc sheets on each side of the cathode and then proceed to peel or strip the zinc sheets from the cathode base …
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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 11, 1996 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2018.
- 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.