Programmable refiner controller with horsepower-days per ton sca

Details Programmable refiner controller with horsepower-days per ton sca Programmable refiner controller with horsepower-days per ton sca

1982-04-21

1985-02-05

Thomas, James D.

Boots, shoes, and leggings

162254, 162263, 241 36, 241 37, G06F 1546, B02C 714, D21F 104

Patent

active

044981376

ABSTRACT:
A programmable refiner controller which is an improvement over the system described in U.S. Pat. No. 4,184,204 and allows the appropriate ratio to be selected for calculating the correct values of factors P1 and P2 to obtain the proper controller gain while maintaining the transfer function for the consistency range utilized. The maximum energy per ton limit can be established to protect the refining system for over-refining or possibly breaking the disk elements inside the refiner. The controller-ratio or remote set point resolution can be increased in the instrument set point. The invention provides the operator with a control tuned so that the dial on the remote set point module indicates not only the ratio and arbitrary net horsepower days per ton, but the exact energy used per ton of material paper stock.

REFERENCES:
patent: 3490689 (1970-01-01), Hart et al.
patent: 3604645 (1971-09-01), Keyes
patent: 3604646 (1971-09-01), Keyes et al.
patent: 3620915 (1971-11-01), Keyes et al.
patent: 3630836 (1971-12-01), Bietry et al.
patent: 3654075 (1972-04-01), Keyes et al.
patent: 4184204 (1980-01-01), Flohr

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