Method of producing heavy coatings by continuous galvanizing

Claim 1

A METHOD OF PRODUCING HEAVY GALVANIZED COATINGS ON FERROUS STRIP STOCK IN A CONTINUOUS PROCESS COMPRISING: (A) PROVIDING A ROUGH SURFACE UPON THE STRIP, (B) PASSING THE STRIP AT A TEMPERATURE BETWEEN, 350*F. AND 820*F. CONTINUOUSLY INTO A MOLTEN GALVANIZING BATH HELD AT A TEMPERATURE OF NOT GREATER THAN 840*F., (C) PASSING THE STRIP THROUGH THE MOLTEN BATH AT A RATE OF NOT LESS THAN 100 FEET PER MINUTE, (D) PASSING THE STRIP IN AN UPWARD DIRECTION FROM THE MOLTEN BATH BETWEEN EXIT ROLLS, (E) SAID ROLLS BEING PARTIALY SUBMERGED TO DEPTH OVER THE ROLL AXES IN THE COATING BATH, (F) SAID ROLLS BEING SUFFICIENTLY CLOSE TO THE COATED STRIP TO SMOOTH THE COATING WITHOUT EXERTING A WIPING ACTION THEREON, (G) OPERATING THE EXIT ROLLS IN THE SAME DIRECTION AS THE STRIP AT A PERIPHERAL SPEED AT LEAST 10% GREATER THAN THE SPEED OF THE STRIP, AND (H) QUENCHING THE STRIP BY UPWARDLY DIRECTED GAS BLASTS LOCATED ABOVE THE SURFACE OF THE BATH.

Claim 2

A METHOD OF PRODUCING HEAVY GALVANIZED COATINGS ON FERROUS STRIP STOCK IN A CONTINUOUS PROCESS COMPRISING: (A) PROVIDING A ROUGH SURFACE UPON THE STRIP, (B) PASSING THE STRIP AT A TEMPERATURE BETWEEN, 350*F. AND 820*F. CONTINUOUSLY INTO A MOLTEN GALVANIZING BATH HELD AT A TEMPERATURE OF NOT GREATER THAN 840*F., (C) PASSING THE STRIP THROUGH THE MOLTEN BATH AT A RATE OF NOT LESS THAN 100 FEET PER MINUTE, (D) PASSING THE STRIP IN AN UPWARD DIRECTION FROM THE MOLTEN BATH BETWEEN EXIT ROLLS, (E) SAID ROLLS BEING PARTIALY SUBMERGED TO DEPTH OVER THE ROLL AXES IN THE COATING BATH, (F) SAID ROLLS BEING SUFFICIENTLY CLOSE TO THE COATED STRIP TO SMOOTH THE COATING WITHOUT EXERTING A WIPING ACTION THEREON, (G) OPERATING THE EXIT ROLLS IN THE SAME DIRECTION AS THE STRIP AT A PERIPHERAL SPEED AT LEAST 10% GREATER THAN THE SPEED OF THE STRIP, AND (H) QUENCHING THE STRIP BY UPWARDLY DIRECTED GAS BLASTS LOCATED ABOVE THE SURFACE OF THE BATH.