Dunnage material and process
CA 2348181 A1 · Owner: Wehrmann, Rick S. · Inventors: Lerner, Bernard; Wehrmann, Rick S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of and apparatus for forming dunnage are disclosed. A chain of interconnected plastic pouches are fed along a path of travel to a fill, and seal station. The pouches are sequentially opened as each pouch is positioned in the fill station. Each pouch is opened by directing a flow of air, through a pouch fill opening to separate a face from a back of each such pouch and continuing the flow of air through each such opening to inflate each opened pouch. Steps are taken to control the volume of air in an inflated pouch. Each such inflated pouch is then sealed to create hermetically closed and inflated dunnage units. Novel web and dunnage units are also disclosed.
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 May 18, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 18, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2023.
- 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.