Method and apparatus for constructing multiple layer corrugated board containers
CA 1194720 A · Owner: Macmillan Bloedel Limited · Inventors: Gillard, David F.; Yelf, Jack T.
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 is disclosed for forming a multi-layered container of compressible sheet layers such, as corrugated board. The containers are formed in a single operation and avoids the known techniques of folding the layers before laminating in multistep methods. Furthermore the container may be folded without the layers separating. The method of forming a multi-layered container having a plurality of flat sides with corners between adjacent sides comprises winding compressible sheet layers on a forming mandrel. In the process, one edge of a layer is attached adjacent to a corner of a mandrel, a shoe plate applies pressure to the layer against the mandrel as it rotates to …
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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 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2002.
- 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.