D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 5/02 (2006.01) D21C 7/12 (2006.01)
Patent
CA 2110190
Abstract of the Invention An on-line automated control system for use in drainage and retention chemical programs used in tissue, paper and board mills is disclosed. Utilizing strategically placed sensors in the wet end of a paper machine, the fiber charge and turbidity, prior to the headbox as well as in the white water loop, are constantly measured. Based on these readings, the addition of a chemical coagulant and a chemical drainage and retention aid are controlled via a computer system.
Gossage Robert V.
Ketolainen Pekka T. K.
St. John Michael R.
Tyree Rufus G.
Nalco Chemical Company
Smart & Biggar
LandOfFree
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