Method and apparatus for forming bags
CA 2101403 A1 · Owner: Pope, Mike · Inventors: Woods, John Glyn; Pope, Mike; Rhodes, Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a welding tool for welding and cutting a tear seal edge into multiple plies of plastic film. The welding tool includes a base and a knife edge on the base. A cross section of the knife edge has three surfaces for engaging the multiple plies of plastic film. The three surfaces at the cross section are a planar cutting surface a planar welding, surface, and a planar separating surface. The planar cutting surface presses into the multiple ply plastic film in a coplanar engagement with the multiple ply plastic film. The planar welding surface is located on a first side of the planar cutting surface. The planar welding surface fuses the multiple plies of plastic film to …
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 July 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2015.
- 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.