Process for the production of a can by wall ironing
CA 2322801 A1 · Owner: Corus Staal B.V. · Inventors: Ras, Hendrik Bastiaan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the production of a can comprising a base and a tubular body from sheet metal which is coated on at least one side with a layer of plastic in , which process, firstly, a round disc is produced from the sheet metal which , disc is then deep-drawn into a cup which is coated at least on the outside with the layer of plastic, after which this cup is formed into a can by wall ironing, the wall ironing taking place in a single stroke by moving the cup successively through a plurality of wall-ironing rings in which process an , optionally metal-coated steel sheet is used as the sheet metal and in which , process the entry angle for each of the successive at least three wall-ironing …
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 February 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2021.
- 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.