W. Schalfhorst Ag & Co.

Lothar Boekels

A method of avoiding constant pattern windings when winding yarn packages by driving traversing yarn guides in accordance with a periodic disruption function, wherein the magnitude of the slope of the periodic disruption function in the vicinity of the extreme points of the function is greater in comparison than the magnitude of the slope of a corresponding sine function having the same amplitude and period. Moreover, the magnitude of the slope of the periodic disruption function changes at least once between a zero crossover and an extreme point, whereafter, until the vicinity of the extreme point is reached, the magnitude of the slope of the periodic disruption function is less than the magnitude of the slope of the corresponding sine function having the same amplitude and period. Preferably, the amplitude and period of the periodic disruption function of the present invention is also randomly varied periodically. Moreover, in a polygonal periodic disruption function of the present invention, the salient points per half period of the polygonal function are preferably randomly changed periodically.

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Monchengladbach, Germany

Lothar Boekels