a composite endless belt for use in printers , imaging devices and the like comprises a nonwoven , porous , open pore thermoplastic substrate having one or more electrically conductive elastomeric coatings thereon . the substrate , which comprises a combination of short fibers and fibrids or a randomly laid continuous fiber , is formed into an endless loop and the overlapping ends thereof are welded together ultrasonically . the belt is very thin , the combined thickness of the substrate and coating or coatings being less than about 0 . 015 inches .