Apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation

An apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation, wherein an air stream transports fibre flocks through the fibre transporting duct, comprising:

• a fibre transporting duct;
• a waste duct operatively connected with the fibre transporting duct at a branching point thereof;
• deflecting means for the fibre flocks;
• means for pivotably mounting said deflecting means at the branching point of the fibre transporting duct;
• a drive mechanism for activating said deflecting means;
• a metal detector arranged upstream of the branching point with respect to the direction of movement of the fibre flocks through the fibre transporting duct and surrounding at least a portion of the fibre transporting duct;
• means defining a power source for operating said drive mechanism;
• control means for operatively communicating said power source with said drive mechanism for selectively activating said deflecting means;
• said metal detector being operatively connected with said control means for activating said deflecting means in response to the passage of a metallic object through said portion of the fibre transporting duct at least partially surrounded by said metal detector, in order to shift within a short time the deflecting means from an idle position, where the fibre transporting duct is open and the waste duct is maintained closed, into a working position, in which the fibre transporting duct is closed and the waste duct is maintained open.