Patent ID: 6109066
Filing Date: 2000-08-29
Classification: D02J,G01N

Abstract:
Device for manufacturing a composite yarn formed by the composition of continuous glass filaments and continuous filaments of a thermoplastic organic substance, comprising;at least one bushing which is fed with glass, the lower face of said bushing being provided with a multiplicity of orifices from which a multiplicity of glass filaments may be drawn;a coating device positioned to coat glass filaments from said bushing;at least one extrusion head capable of being fed with a molten thermoplastic organic substance, the lower face of said extrusion head being provided with a multiplicity of orifices from which a multiplicity of organic filaments may be drawn, said head being associated with a drawing device comprising at least two drums and a venturi device which projects organic filaments from the extrusion head into a sheet formed by the glass filaments to form a composite yarn;a composite yarn forming device;an optical yarn detecting device arranged between the drawing device and the venturi device; anda circuit which controls the speed of rotation of at least one of the drums based on information from said yarn detecting device.