Method and system for detecting plate clashing in disc refiners
CA 1105604 A · Owner: Price (Nfld.) Pulp & Paper Limited · Inventors: Butler, Donald J.; Rogers, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for the detection of plate clashing in disc refiners are provided herein. The signal from either an acoustic or vibration monitor is processed through a filter which isolates those distinct predetermined frequencies at which a significant increase in signal level is known to occur during a clash or are generated in association with imminent or actual plate clashing, the distinct frequencies being related to the clash and to the characteristics of the discs of the refiner. The signal level of the filtered data is compared with a threshold level at which protective action must be taken. Protection can be automatically initiated by the plate clash detection system, e.g. by …
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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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.