Patent · US Expired

Process for measuring the state of charge of suspensions and for controlling the addition of auxiliary agents to the suspensions

US4294656A · kind A · utility

9Cited by

1References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Ulrich Beck · Bornheim, DE
Ekhard Rohloff · Goldkronach, DE

Key dates

Filing date	Apr 1, 1980
Grant date	Oct 13, 1981
Priority date	—
Expiry date	Apr 1, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG05D21/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

When a suspension is exposed to a field of ultrasound, a voltage can be tapped from two electrodes whose distance apart is an odd multiple of half ultrasonic wavelengths, and this voltage can be used as a controlling factor for the addition of, preferably, retention and flocculating agents to the suspension. The process is particularly suitable for fibre suspensions for the purpose of monitoring the starting process in paper machines and for rapid operating control.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.