Zellweger Luwa Ag

Uster Technologies Ag

Rolf Joss

Reto Gehrig

Phillipp Ott

Peter Schilling

Hanspeter Wepfer

Norbert Ziganek

Beat Keller

Bernhard Hitlebrand

Felix Brunner

Beat Emch

Paul Geiter

Rafael Storz

Fabian PFÄFFLI

Philipp Scherler

A measuring circuit used for the capacitive examination of a moving elongated textile test material such as card sliver, roving, yarn or woven fabric, having a measuring capacitor for accommodating the test material, and a component with a capacitance which can be changed by an electric control signal. The measuring circuit can thus be balanced in a simple, rapid, cost-effective and especially automatic way.

Capacitive measuring circuit

Capacitive measuring circuit for yarn inspection

The invention relates to a device for measuring properties of a longitudinally moved test material in a measuring cell. In order to provide a device which is easier to adapt to the requirements of a customer and to the special conditions of a production machine for longitudinally moved test material, the measuring cell ( ) is connected to a processor ( ), which is associated exclusively with the measuring cell.

Device for measuring properties of a longitudinally moved specimen such as yarn

The invention relates to a method and a device for determining proportions of solid matter in a test material. In order to reliably and easily determine proportions of solid matter in a test material, even in the case of transparent matter or matter of a similar color to the test material, the test material is exposed to an electric field and dielectric properties of the field are determined with the test material present. Two electrical quantities are determined from the dielectric properties and combined, resulting in a characteristic value which is independent of the mass of the test material. The characteristic value is compared with a previously determined characteristic value for the matter in question and the proportion of solid matter is determined therefrom.

Method and device for determining proportions of solid matter in a test material

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Horgen, Switzerland

Rolf Joss