Patent ID: 6996966
Filing Date: 2006-02-14
Classification: D01H

Abstract:
1. A blocking device of the unwinding of threads ( 3 , 4 ) from the feeding bobbins ( 1 , 2 ) of a twisting spindle (F) with coaxially superimposed bobbins inserted on their own hollow pin ( 10 , 11 ), each thread ( 3 , 4 ) unwinding upwards from its bobbin and in the same direction as the other thread, directly entering the hollow pin ( 10 , 11 ) without penetrating, during its run, the space surrounding the other bobbin, characterized in that the blocking device of the unwinding of the thread ( 4 ) of the lower bobbin ( 2 ) comprises a mechanical interceptor ( 48 ) integral with the upper hollow pin ( 10 ), activated with means for activating ( 55 , 71 ) for its descent to enter into the unwinding range of the thread ( 4 ) preventing it from passing into the lower hollow pin ( 11 ).