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Abstract

Device for the determination of the amount of substance or the density of fiber structures, which utilizes the elastic properties of the fiber material. By means of a sphere which is positioned in a conical opening in a duct through which the fibers pass and which presses on the fibers with a part of its surface, a nozzle is throttled, so that the pressure on the nozzle represents a measure for the force on the sphere. This pressure is in a definite relationship to the fiber pressure on the sphere and can be measured with a pressure measuring device and transformed into an electrical signal by means of a normal commercially-available converter. A small groove in the wall of the duct behind the sphere avoids the attachment of fibers between the sphere and the opening.

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First Claim