Method at the manufacture of mechanical pulp
CA 1281571 C · Owner: Hartler, Nils J. Ch · Inventors: Strand, William C.; Hartler, Nils J. Ch
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The refiner process and the properties of the pulp produced are controlled by means of an accelerometer positioned on a refiner disc, which accelerometer measures high-frequency vibrations. The signal from the accelerometer is converted to vibration energy, which is utilized together with one or several other process variables for controlling and adjusting the process.
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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.