Method for manufacturing of packaging-container blanks
CA 1064663 A · Owner: Pekema Oy · Inventors: Stolpe, Erik; Honkanen, Arto; Laiho, Erkki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of manufacturing packaging-container blanks is disclosed which method includes forming a substantially continuous sheet of blanks which sheet comprises a substrate and a coaling material attached to said substrate. The coating material at the edges of the blanks of said sheet either extends beyond the substrate or is unattached to the substrate adjacent the edge or, both. The sheet of blanks is manufactured by extruding a molten thermoplastic coating material onto the substrate between two revolving cylindrical rolls. The substrate and the coating material are joined in such a manner that at spaced selected, intervals, elongated zones are provided where they are unattached to each …
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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 October 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 23, 1996.
- 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.