Uster Technologies Ag

Uster Technologies,

Gabriela Peters

Christine Meixner

Sandra Edalat-Pour

According to the method for characterizing fancy yarn, at least one characteristic of the fancy yarn is scanned along the longitudinal direction of the fancy yarn. Values of the scanning are evaluated and the results of the evaluation are outputted. The results of the evaluation are the fancy yarn parameters such as base yarn mass, base yarn diameter, slub distance, mass increase (&#x394;M) of a slub, slub diameter increase, slub diameter, slub length (L) and/or slub total mass. At least one result of the evaluation is outputted in the form of a graphic representation, for example as a scatter diagram. Such a graphic representation provides a clear representation of the measurement results. The occurring data is reduced and may be divided up into different categories.

Characterization of fancy yarn

According to the method for characterizing fancy yarn, at least one characteristic of the fancy yarn is scanned along the longitudinal direction of the fancy yarn. Values of the scanning are evaluated and the results of the evaluation are outputted. The results of the evaluation are the fancy yarn parameters such as base yarn mass, base yarn diameter, stub distance, mass increase (&#x394;M) of a stub, slub diameter increase, stub diameter, slub length (L) and/or slub total mass. At least one result of the evaluation is outputted in the form of a graphic representation, for example as a scatter diagram. Such a graphic representation provides a clear representation of the measurement results. The occurring data is reduced and may be divided up into different categories.

According to the method for characterizing fancy yarn, at least one characteristic of the fancy yarn is scanned along the longitudinal direction of the fancy yarn. Values of the scanning are evaluated and the results of the evaluation are outputted. The results of the evaluation are the fancy yarn parameters such as base yarn mass, base yarn diameter, slub distance, mass increase of a slub, slub diameter increase, slub diameter, slub length and/or slub total mass. On evaluation, a measurement curve is produced from the values of the scanning, and an area (A(x)) between the measurement curve and a previously determined base yarn mass is computed. A permanent increase in the course of the area (A(x)) is used as a criterion for the presence of a slub. Slubs may be differentiated from yarn imperfections in a reliable manner by way of the area (A(x)).

According to the method for characterizing fancy yarn, at least one characteristic of the fancy yarn is scanned along the longitudinal direction of the fancy yarn. Values of the scanning are evaluated and the results of the evaluation are outputted. The results of the evaluation are the fancy yarn parameters such as base yarn mass, base yarn diameter, slub distance, mass increase (&#x394;M) of a slub, slub diameter increase, slub diameter, slub length (L) and/or slub total mass. The evaluation includes a smoothing or idealization of the scanning values, e.g. an idealization of the webs (') as horizontal stretches and of the slubs (&#x2032;) as trapeziums. the idealized course of the curve may be subtracted from the original course of the curve in order to obtain information on the slubs on the one hand, and on the virtual base yarn on the other hand. The occurring data quantity may be reduced by specifying parameters of the idealized course of the curve.

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Fehraltorf, Switzerland

Gabriela Peters