Clutch facing and method of manufacture

Claim 1

A FLAT VULCANIZED DISC HAVING HIGH STRENGTH AND WEAR RESISTANT PROPERTIES COMPRISING A COMPOSITE CORRUGATED ASBESTOS PAPER REINFORCING STRIP DISPOSED IN CONVOLUTE FORM WITH THE PAPER AND FILLED CORRUGATED APERTURES EXTENDING THROUGHOUT THE BODY OF THE DISD EDGEWISE TO THE FLAT PLANE SURFACES OF SAID DISC, SAID COMPOSITE PAPER STRIP INCLUDING A FLAT BACKING SHEET AND A CORRUGATED SHEET OF THIN ASBESTOS PAPER ADHERED TOGETHER AS A LAMINATE, A STIFFENING IMPREGNANT FOR THE PAPER SHEETS AND A STRENGTH AND DURABILITY IMPARTING FILLER FOR THE CORRUGATION APERTURES, SAID FILLER COMPRISING COMMINUTED FRICTION MATERIAL EMBEDDED IN A HEAT HARDENED BINDER. THE METHOD OF FORMING AN ANNULAR FRICTION DISC ADAPTED FOR USE AS A CLUTCH FACING WHICH COMPRISES, ASSEMBLING FLAT AND CORRUGATED SHEETS OF HEAT RESISTING ASBESTOS PAPER IMPREGNATED WITH A STIFFENING AND STRENGTH IMPARTING BINDER IN COMPOSITE STRIPS WITH THE CORRUGATIONS EXTENDING TRANSVERSELY THEREOF, SPIRALLY WINDING EACH STRIP IN THE FORM OF A TUBULAR ELEMENT, FORMING A SANDWICH WITH A TRANVERSE SECTION OF ONE OF SAID ELEMENTS AS A CORE BETWEEN FACING SHEET OF HEAT FUSIBLE HARDENABLE BINDER INCORPORATION FRICTION IMPARTING FILLER PARTICLES, SUBJECTING SAID SANDWICH TO HEAT THE FUSE THE BINDER AND COMPRESSING IT IN A DIRECTION FORCING SAID FUSED AND FILLED BINDER INTO THE CORRUGATION PORES, AND HARDENING THE PRODUCT TO FORM A DISC WITH THE PAPER STRIPS AND BINDER FILLED CORRUGATION PORES EXTENDING PERPENDICULARLY TO THE WEARING FACE OF THE CLUTCH FACING AND EXPOSED THERETO.