Method and apparatus for producing lids with tear tabs
CA 1233355 A · Owner: Alcan Ohler G.M.B.H. · Inventors: Stenzel, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a procedure and device for producing square lids with tear tabs at each corner from a web of foil using a cutting device to cut an incision right through to the edge of the foil web, a folding tool to fold the areas of foil on both sides of the cutting plane of the cutting device back on themselves to form the tear tabs, and a cut-off device to cut the foil web into lengths to form the lids. It is the object of the invention to develop a procedure and device of the kind mentioned above in such a way that the lids can be produced with the minimum of design-related and procedural effort without impairing their tear-off characteristics. This goal is achieved by …
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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
- Granted March 1, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 1, 2005.
- 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.