Unwoven papermaker's felt

Claim 1

A NEW ARTICLE OF MANUFACTURE COMPRISING A PAPERMAKER''S FELT OF ENDLESS BELT-LIKE FORMATION FOR USE IN PAPERMAKING MACHINERY FOR SUPPORTING, TRANSPORTING, AND DRAINING WET PAPERMAKING FIBRE MATERIAL COMPRISING A FOUNDATION LAYER HAVING A NON-WOVEN FIBROUS POROUS STRUCTURE CONSISTING OF A THREAD SHEET ASSEMBLE MADE UP OF A MULTIPLICITY OF HELICALLY-ARRANGED CONTINUOUS THREAD LENGTHS, THE CONVOLUTIONS OF WHICH ARE DISPOSED WIDTHWISE OF THE FELT AND THE LINEAR RUNS OF WHICH EXTEND LONGITUDINALLY THEREOF IN A GENERAL PREDETERMINED SPACED PARALLEL RELATIONSHIP TO ONE ANOTHER SO AS TO FORM DEFINITE LIQUID DRAINAGE PASSAGES BETWEEN THEM FOR RAPID DRAINING OF LIQUID THROUGH THE FELT FROM THE OUTER SIDE OF THE INNER SIDE THEREOF, SAID HELICALLY DISPOSED THREAD LENGTHS EACH BEING OF A COMPOSITE YARN STRUCTURE AND CONSISTING OF A CENTRAL CORE STRAND MADE UP OF A PLURALITY OF FINE SYNTHETIC TEXTILE FILAMENT YARNS AROUND THE EXTERIOR OR WHICH LONGITUDINALLY EXTENDS A SINGLE HELICALLY-WRAPPED STAPLE FIBER YARN LENGTH OF ANY OF THE USUAL TESTILE FIBRIC YARN MATERIALS, AN INTERMEDIATE LAYER IN THE FORM OF A THIN FLAT TEMPORARY BINDER SHEET AND COMPOSED OF A WATER-SOLUBLE VINYL PLASTIC FILM MATERIAL SUPERPOSED UPON THE ENVELOPING SAID FOUNDATION THREAD SHEET, SAID BINDER SHEET BEING ADHERENTLY SECURED TO THE THREADS OF SAID FOUNDATION LAYER BY A COATING OF A SUITABLE WATER-SOLUBLE ADHESIVE MATERIAL AND SAID VINYL PLASTIC BINDER SHEET AND ITS WATER-SOLUBLE COATING MATERIAL FUTHER BEING CAPABLE OF SUSEQUENT REMOVAL EASILY FROM THE FINAL MANUFACTURED FELT PRODUCT WHEN THE LATTER IS READIED FOR USE WITH WEB PAPERMAKING MATERIAL, AND AN OUTER COVERING BODY OF UNWOVEN FIBROUS MATERIAL SUPERPOSED UPON AND CO-EXTENSIVE WITH SAID BINDER SHEET LAYER, SAID FIBROUS COVERING BODY BEING INTEGRALLY UNITED WITH THE THREADS OF SAID FOUNDATION LAYER BY HAVING CONSIDERABLE FIBERS NEEDLED IN A DEPTHWISE DIRRECTION THROUGH BOTH SAID BINDER SHEET AND SAID THREAD SHEET LAYERS AND INTERLOCKED WITHIN THE THREADS OF THE LATTER AND ALSO WITH THE RESPECTIVE HELICAL YARNS CARRIED BY SUCH THREADS, THE OUTER FACE OF SAID FIBROUS BODY SERVING AS THE ACTIVE SUPPORTING SURFACE OF SAID FELT FOR DRAINING AND TRANSPORTING WET PAPERMAKING FIBRE MATERIAL IN A PAPERMAKING MACHINE.