Method for producing, filling and sealing bags
CA 2070718 A1 · Owner: Windmoller & Holscher · Inventors: Tetenborg, Konrad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing bags from a tubular film of thermoplastic synthetic resin, preferably including side folds is described. The method includes the step of forming a closed end, and then severing the closed portion from the web to provide an open-ended bag (which can then be filled and sealed by conventional methods). In making the closed end two parallel, spaced apart transverse welds are formed in sequence, using the, same welding tool. This provides a bag with an integrated gripper or handle. A hole, or holes, may be incorporated in the space between the parallel welds.
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 June 8, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2014.
- 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.