Patent ID: 6263937
Filing Date: 2001-07-24
Classification: B29C,H05K

Abstract:
An apparatus for producing structurally-improved resin-impregnated fiber substrate for printed circuit boards and reinforced plastic composites, said device comprisinga cylinder having first and second opposed end portions and defining a central axis;means for supplying a plurality of yarn ends to said cylinder;a collar adjacent said first end portion of said cylinder having an inner circumferential surface an outer circumferential surface an upper rim, and a lower rim, said collar having an inside diameter substantially equivalent to the outside diameter of said cylinder;a plurality of dents formed in said collar and spaced apart substantially in parallel relationship to one another about said inner surface of said collar;means for guiding the plurality of yarn ends longitudinally along said surface of said cylinder from said first end portion to said second end portion in their substantially parallel spaced relationship to one another;means for winding other yarns around said cylinder transversely to and in close overlying relationship with the longitudinally-guided yarns;means for applying a liquid resin to the longitudinal yarns while the yarns are on said cylinder and while maintaining the parallel spaced relationship of the longitudinal yarns on said cylinder; andmeans for separating, sections of a substrate formed by partially curing, the longitudinal and transverse yarns as the substrate advances along the outer surface of said cylinder;wherein said lower rim of said collar defines a bushing for directing the yarn ends from said yarn supply to said inner circumferential surface of said collar in an upward direction;wherein said plurality of dents are positioned such that the yarn ends are guided from said yarn supply to the surface of said first end portion of said cylinder while maintaining the parallel spaced relationship of the yarn ends to one another.