Process for preparing carbon fibers

Claim 1

THE METHOD OF PREPARING CARBON FIBER FABRICS HAVING HIGH STRENGTH AND RESISTANCE TO EROSION WHICH INCLUDES THE STEPS OF WASHING A RAYON FABRIC IN A DETERGENT SOLUTION TO REMOVE FINISH MATERIALS TO BELOW ABOUT 0.25% ETHER EXTRACTABLES, RINSING THE WASHED FABRIC FREE OF FINISH MATERIALS AND THE DETERGENT SOLUTION, DRYING THE FABRIC, WINDING THE FABRIC INTO A SKEIN, HEATING THE FABRIC SKEIN IN A CLOSED ATOMSPHERE IN SUCCESSIVE STEPS, EACH STEP LASTING IN EXCESS OF ABOUT TWELVE HOURS AND BEING ABOUT 20*F. TO 50* F. HIGHER THAN THE PREVIOUS STEP, THE TEMPERATURE STARTING AT ABOUT 360*F. AND BEING RAISED UP TO ABOUT 700*F., TO DRIVE OFF EXCESS WATER AND TO FIRST FORM INTERMEDIATE LEVOGLUCOSAN PRODUCTS AND FINALLY CARBONACEOUS CHARS AND VOLATILE TARS, THE CARBONACEOUS CHARS CONSTITUTING NONGRAPHITIC CARBON FIBERS, COOLING THE CARBON FIBER FABRIC THUS FORMED TO BELOW ABOUT 300*F., FLASH FIRING THE CARBON FIBER FABRIC BY FEEDING THE FABRIC THROUGH AN APPROXIMATELY 2200*F. ENVIRONMENT FOR AN EXPOSURE TIME OF ABOUT TEN SECONDS, COOLING THE FLASH FIRED FABRIC BY QUENCHING IN WATER SUBSTANTIALLY IMMEDIATELY AFTER EXPOSURE TO THE HIGH TEMPERATURE ENVIRONMENT, AND DRYING THE FABRIC.

Claim 2

THE METHOD OF PREPARING CARBON FIBER FABRICS HAVING HIGH STRENGTH AND RESISTANCE TO EROSION WHICH INCLUDES THE STEPS OF WASHING A RAYON FABRIC IN A DETERGENT SOLUTION TO REMOVE FINISH MATERIALS TO BELOW ABOUT 0.25% ETHER EXTRACTABLES, RINSING THE WASHED FABRIC FREE OF FINISH MATERIALS AND THE DETERGENT SOLUTION, DRYING THE FABRIC, WINDING THE FABRIC INTO A SKEIN, HEATING THE FABRIC SKEIN IN A CLOSED ATOMSPHERE IN SUCCESSIVE STEPS, EACH STEP LASTING IN EXCESS OF ABOUT TWELVE HOURS AND BEING ABOUT 20*F. TO 50* F. HIGHER THAN THE PREVIOUS STEP, THE TEMPERATURE STARTING AT ABOUT 360*F. AND BEING RAISED UP TO ABOUT 700*F., TO DRIVE OFF EXCESS WATER AND TO FIRST FORM INTERMEDIATE LEVOGLUCOSAN PRODUCTS AND FINALLY CARBONACEOUS CHARS AND VOLATILE TARS, THE CARBONACEOUS CHARS CONSTITUTING NONGRAPHITIC CARBON FIBERS, COOLING THE CARBON FIBER FABRIC THUS FORMED TO BELOW ABOUT 300*F., FLASH FIRING THE CARBON FIBER FABRIC BY FEEDING THE FABRIC THROUGH AN APPROXIMATELY 2200*F. ENVIRONMENT FOR AN EXPOSURE TIME OF ABOUT TEN SECONDS, COOLING THE FLASH FIRED FABRIC BY QUENCHING IN WATER SUBSTANTIALLY IMMEDIATELY AFTER EXPOSURE TO THE HIGH TEMPERATURE ENVIRONMENT, AND DRYING THE FABRIC.