Method and apparatus for treating fiber suspension
CA 1318283 C · Owner: Ljokkoi, Risto · Inventors: Ljokkoi, Risto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method and apparatus for treating fiber suspension, for example sorting or grading. The method and apparatus in accordance with the invention is especially suitable for the treatment of fiber suspensions in the pulp and paper industry. The most serious defect in the known apparatuses is that the relative amount of the reject, in other words the material which is unqualified for the finished product adjacent to the, screen surface rises directly in proportion to the distance from the initial or front end of the screen surface since acceptable fraction is discharged through the screen surface but the reject is discharged only after it has traversed the whole …
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
- Granted May 25, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2010.
- 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.