Triple wall fold construction and forming process and mechanism
CA 2030408 C · Owner: Keech, Roderick George · Inventors: Flynn, John William; Keech, Roderick George; Smith, James Franklin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved triple wall corrugated paper board fold construction is provided which is formed by joining a single wall sheet with a nonadhered band of the medium to a contiguous liner of another one of the single wall sheets, slitting and removing a portion of the nonadhered band along a narrow bending area and, removing the slit strip to leave a bending groove formed with one or more score lines in the material underlying the groove, as the board continuously moves along a path of travel.
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 November 21, 1990 and granted September 24, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2012.
- 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.