Continuously operating drum-type press drier
CA 2053452 C · Owner: Saalasti, Teijo · Inventors: Saalasti, Teijo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is to provide a continuously operating drum-type press drier, especially for bark desiccation. The drier comprises an inclined rotating drum (1) provided with perforations (2) and a cylinder (3) which is fitted therein and forms with the drum, in the lower part thereof, a clamp cheek. The bark mass fed into the drum, at the front end thereof is, subjected several times to compression while the drum is rotating, before being, discharged through the rear end of the drum. To enhance the dewatering the cylinder (3), according to the invention is also provided, with perforations (4) at the front end thereof, while the rear end of the cylinder is unperforated. The …
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 October 15, 1991 and granted July 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2013.
- 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.