Patent ID: 6402492
Filing Date: 2002-06-11
Classification: D04H

Abstract:
An apparatus for producing a spun-bond web comprising:means including a spinneret for producing a descending curtain of thermoplastic synthetic resin filaments; an endless fluid-permeable belt having an upper pass located below said spinneret for collecting said filaments and forming a spun-bond web therefrom; a suction device below said upper pass of said belt having an elongated inlet extending transversely to said upper pass of said belt and below said upper pass for drawing air through said upper pass of said belt and said filaments downwardly onto said upper pass of said belt, said inlet having a pair of opposite longitudinal edges; and a respective baffle flap pivotally mounted at each of the longitudinal edges and extending from the respective longitudinal edge substantially to the upper pass of the belt over an entire length of said inlet and swingable to vary the draw of air through said belt.