Packing laminate in the form of a web and a method for manufacturing the same
CA 1201024 A · Owner: Tetra Pak International Ab · Inventors: Glans, Jan-Erik; Nilsson, Sven G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A packing laminate in the form of a web with thinned edge zones is manufactured by providing a wide raw material web simultaneous1y with a number of parallel thinned areas. The raw material web is then covered with layers of thermoplastic material, whereupon it is divided into webs of the desired width by means of cuts placed asymmetrically in the said thickness-reduced areas. As a result the finished laminate webs obtain thermoplastic-covered thickness-reduced edge zones of different widths.
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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 February 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2003.
- 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.