Reliable pulp consistency measurement using line loss technique
CA 1337998 C · Owner: Nykanen, Tuomo S. · Inventors: Sherman, Michael I.; Nykanen, Tuomo S.; Phillips, Joseph R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The consistency of a medium consistency (e.g. about 6-18 percent) paper pulp (e.g. Kraft pulp) may be accurately determined by determining the pipe line friction drop. The pulp is deaerated with a fluidizing pump, and pumped into a conduit. A pair of spaced pressure taps are provided in the conduit and they are operatively connected to a differential pressure transmitter, such as one having a piezoresistive sensor. The transmitter may be calibrated to correspond to a desired consistency or the temperature and flow rate of the pulp may be measured and from this, utilizing the Bodenheimer equation, the consistency may be calculated. The method and apparatus are much more effective in …
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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 January 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 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.