Method of determining a volumetric percentage of air in a fiber

Details Method of determining a volumetric percentage of air in a fiber Method of determining a volumetric percentage of air in a fiber

1998-04-16

1999-04-06

Silverman, Stanley S.

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

162 49, 73 191, 73 1901, D21F 1100, G01F 500

Patent

active

058913076

ABSTRACT:
In a paper-making machine, a method of determining a volumetric percentage of air in a fiber suspension for delivery to a headbox. The fiber suspension is transported through a fluid conduit. A sound transmitter and a target receiver are positioned relative to the fluid conduit. A sound is transmitted through the fiber suspension from the sound transmitter to the target receiver. A speed of the transmitted sound from the sound transmitter to the target receiver is established. The volumetric percentage of air in the fiber suspension is determined, dependent upon the established speed of sound.

REFERENCES:
patent: H608 (1989-03-01), Goolsby
patent: 3246516 (1966-04-01), Maropis
patent: 3654072 (1972-04-01), Massa
patent: 5621161 (1997-04-01), Leyse

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