Method for debarking in a drum, and separation of bark from a log flow
CA 2454635 A1 · Owner: Metso Paper, Inc. · Inventors: Tohkala, Antti
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a continuously operating drum debarking method for processing logs. The logs to be debarked are fed into a debarking drum (4') having no bark discharge openings in the shell. The logs together with the bark loosened therefrom are discharged to a downstream bark separating system. Therein the , logs are subjected mutual movements resulting in the removal of bark from about the logs. The thus separated bark pieces are further discharged onto a conveyor system located under the separating equipment.
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 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2025.
- 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.