Composite filament

Claim 1

AN IMPROVED UNITARY SPUN COMPOSITE FILAMENT ESPECIALLY ADAPTED FOR USE IN YARNS FROM WHICH FABRICS ARE TO BE PREPARED AND WHICH FABRICS ARE LATER TREATED UNDER PREDETERMINED CONDITIONS TO CRIMP AND SEPARATE THE FILAMENT INTO ITS LOWER DENIER COMPONENT FILAMENTS TO CHANGE THE FABRIC PROPERTIES TO CLOSELY RESEMBLE NATURAL SILK, SAID FILAMENT COMPRISING A FIRST CONTINUOUS LONGITUDINALLY EXTENDING COMPONENT OF SUBSTANTIALLY CONSTANT TRANSVERSE CROSS SECTION, SAID FIRST COMPONENT HAVING ITS EXTERNAL SURFACE COMPRISED GENERALLY OF, FOR ANY SHORT LONGITUDINAL PORTION, A DEEP CONVEXLY CURVED CYLINDRICAL SURFACE AND A SHALLOW CONCAVELY CURVED CYLINDRICAL SURFACE GENERALLY POSITIONED TO INTERSECT THE CONVEXLY CURVED SURFACE OR EXTENSIONS THEREOF ALONG TWO PARALLEL LINES SUCH THAT TWO LONGITUDINALLY EXTENDING SHARP EDGES ARE FORMED ON AND ALONG SAID FIRST COMPONENT, SAID FIRST COMPONENT FORMED OF ONE SYNTHETIC POLYMERIC COMPOSITION, SAID FILAMENT FURTHER COMPRISING A SECOND DISTINCT CONTINUOUS LONGITUDINALLY EXTENDING COMPONENT ADHERENT TO AND ALONG SAID FIRST COMPONENT, SAID SECOND COMPONENT OF SUBSTANTIALLY CONSTANT TRANSVERSE CROSS SECTION OF ANOTHER SYNTHETIC POLYMERIC COMPOSITION, SAID COMPONENTS CLOSELY FITTED TOGETHER ALONG AT LEAST ONE CONTACTING SURFACE TO FORM THE COMPOSITE FILAMENT HAVING A SUBSTANTIALLY SMOOTHLY ROUNDED TRANSVERSE CROSS-SECTIONAL CONTOUR FOR EASE OF PROCESSING, SAID COMPONENTS READILY SEPARABLE UNDER SAID PREDETERMINED CONDITIONS ALONG SAID CONTACTING SURFACE INTO SEPARATE INDEPENDENT COMPONENT FILAMENTS.