Manufacture of wood-fiber hardboard

Claim 1

A METHOD OF MAKING HEAT-CONSOLIDATED WOOD-FIBER HARDBOARD COMPRISING THE STEPS OF FRAGMENTIZING RAW WOOD, SUBJECTING SAID FRAGMENTIZED WOOD IN A PRESSURETIGHT CONTAINER TO A HIGH TEMPERATURE-PRESSURE CONVERSION IN AN AQUEOUS LIQUOR FORMED BY A PLURALITY OF PRIOR CONVERSIONS AND ONLY SUFFICIENT MAKE-UP WATER TO MAINTAIN THE CHIPS FREELY DISPERSED THEREIN, SAID CONVERSION COMPRISING THE STEPS OF A RAPID RISE IN TEMPERATURE TO FROM 190* TO 250* C., MAINTAINING SAID HIGH TEMPERATURE AND THE SUPER-ATMOSPHERIC PRESSURE PRODUCED THEREBY FOR A PERIOD OF FROM 5 TO 30 MINUTES, THEREAFTER RAPIDLY SEPARATING SAID WOOD FROM SAID LIQUOR, REDUCING SAID WOOD SUBSTANTIALLY TO FIBERS, FORMING A MAT THEREFROM AND CONSOLIDATING SAID MAT BY SUITABLE HEAT AND PRESSURE.