Method of and apparatus for manufacturing tabs for easy-open can end
CA 2252646 A1 · Owner: Schubert, James R. · Inventors: Schubert, John F.; Cook, Steven T.; Schubert, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus are provided for manufacturing a tab (1) for use with an easy-open can end, which tab is free from any exposed protrusion or cut edge thereon that would otherwise contact a finger or a lip of the user without an increase in the number of manufacturing steps. A tab (1) attached , to a carrier strip by a joint is formed in a tab forming process, and the tab is severed from the strip in a joint severing process wherein the joint is cut off close to the tab nose (10) to separate the tab from the strip. The tab with a protrusion (19) which has a cut edge remaining on the tab nose (10), is lowered while being held against horizontal movement. The protrusion is …
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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 January 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 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.