Method of manufacturing powdered metal plates

Claim 1

A METHOD OF MANUFACTURING FRICTION PLATES FROM METALLIC CORES AND BRIQUETTES OF POWDERED MATERIAL WHICH TEND TO CREEP WHEN SUBJECTED TO HIGH TEMPERATURES AND PRESSURES WHICH COMPRISES CONDITIONING AT LEAST ONE SELECTED SURFACE OF EACH CORE TO PROMOTE A BOND WITH SAID POWDERED MATERIAL, POSITIONING BRIQUETTES OF POWEDERED MATERIAL, COMPRISING POWDERED COPPER AND TIN AS THE PRINCIPAL INGREDIENTS AND SILICA, CARBON AND FERROUS MATERIAL, IN CONTACT WITH SAID CONDITIONED SURFACES TO FORM ASSEMBLES, ARRANGING SAID ASSEMBLIES IN STACKS ALTERNATING WITH SEPARATOR MEMBERS COMPRISING THIN SEPARATOR PLATE OF AN ALLOY COMPRISING CHROMIUM ABOUT 11 TO 15% NICKEL ABOUT 70 TO 80%, MANGANESE ABOUT 1% MAXIMUM, SILICON ABOUT .5%, CARBON ABOUT .15% AND THE REMAINDER PRINCIPALLY FERROUS MATERIAL SUBJECTING SAID STACK TO A PRESSURE OF FROM 10 TO 250 POUNDS PER SQUARE INCH AT A TEMPERATURE AROUND 1450* F. AND SIMULTANEOUSLY INHIBITING THE CREEP OF SAID CORES AND CAUSING THE BONDING OF SAID BRIQUETTES TO SAID CORES.