Method and apparatus for measuring the properties of a fiber or

Details Method and apparatus for measuring the properties of a fiber or Method and apparatus for measuring the properties of a fiber or

1997-08-28

2000-02-01

Brock, Michael

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 5304, G01N 1106

Patent

active

060189894

ABSTRACT:
In the measurement of the properties of a fiber or colloid suspension for process control, e.g. in order to control a refiner, it is known that the fiber length is related to the rate at which water can be drained from a sample. In the present invention it is proposed to introduce the sample at a specified flow velocity into a lower section of an empty analyzer vessel that is subdivided by a filter into the lower section and an upper section situated above the filter. The sample is introduced in such a way that during the time it takes to fill the lower section of the analyzer vessel, sedimentation can occur in the sample fluid. Air is withdrawn from the upper section of the analyzer vessel at a specified rate of flow, by means of an exhaust or regulating valve. The rate at which the upper section is filled with filtrate can then be monitored as a measurement parameter. Alternatively or in addition, the filtrate can be sent to a measurement apparatus, in particular a polyelectrolyte measurement device.

REFERENCES:
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patent: 3330151 (1967-07-01), Reinhall
patent: 3368392 (1968-02-01), Miller
patent: 3538749 (1970-11-01), Danforth
patent: 4024754 (1977-05-01), Alfthan
patent: 4389879 (1983-06-01), Bach et al.
patent: 4554051 (1985-11-01), Danforth
patent: 5408185 (1995-04-01), Krah
patent: 5495751 (1996-03-01), Petzold et al.
patent: 5510702 (1996-04-01), Erikson

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