Opening arrangement on packing containers and a method for the manufacture of the same
CA 1237996 A · Owner: Tetra Pak International Ab · Inventors: Martensson, Kjell; Melle, Hans-Georg; Carlsson, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Opening arrangements for packing containers often comprise a prepunched hole which is covered by a tear-off cover strip. To facilitate the pouring out of liquid contents a so-called pouring rim is frequently present too, that is to say a material strip which forms a projecting rim over which the contents can run. The application of the pouring rim as well as the manufacture of the opening arrangement as a whole are facilitated by joining in advance the pouring rim in a detachable manner to the cover strip whereafter the cover strip and the pouring rim can be applied as a unit.
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
- Granted June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 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.