Process and device for making a corrugated sheet for containers
CA 2283774 A1 · Owner: Harrison, Wayne John · Inventors: Harrison, Wayne John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of forming a laminated material comprising the steps of corrugating a paper sheet (1) and applying a liner , (4) to one or both sides of the corrugated sheet wherein the liner is a pre-, made laminate of a paper backing and plastic film which is metallised on one side and corona treated on the other side. A laminating apparatus for use in the above method is also described herein which includes a means for feeding , out a paper sheet and a liner to a set of corrugating rollers (6) the liner , being a pre-formed laminate of paper and plastics film and means for uniting , the paper sheet and liner immediately subsequently to the corrugation of the …
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
- Filed March 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2020.
- 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.