Method of high speed coating

Claim 1

IN A METHOD OF PROVIDING A METAL SURFACE WITH A PROTECTIVE COATING COMPRISING THE STEPS OF: MOVING SAID SURFACE ALONG A PREDETERMINED PATH, APPLYING TO SAID SURFACES BY MEANS OF FORWARD ROLLER COATING A LIQUID COATING COMPRISING A FILM FORMING SYNTHETIC RESIN, PASSING THE THUS COATED SURFACE INTO A HEATING ZONE AND PROGRESSIVELY HEATING SAID COATING FROM THE METAL SURFACE OUTWARDLY TO A TEMPERATURE BETWEEN 500 AND 800*F. AT A RATE OF AT LEAST 200*F. PER SECOND TO AT LEAST INITIATE SOLIDIFICATION OF SAID RESIN, PASSING IN THE HEATED COATING INTO A TEMPERATURE HOLDING ZONE WHEREIN HEATING OF SAID COATING CONTINUES AT A RATE NOT IN EXCESS OF THE RATE OF HEAT LOSS FROM SAID COATING TO CONTINUE THE HEAT TREATING OF SAID RESIN AT A TEMPERATURE NOT HIGHER THAN THAT ATTAINED IN SAID HEATING ZONE, AND SUBJECTING SAID RESIN TO THE OPERATION OF A COOLING MEDIUM TO RAPIDLY TERMINATE THE HEAT TREATING THEREOF; THE IMPROVEMENT COMPRISING MAINTAINING SAID COATING IN A MOBILE LIQUID STTATTE FOR FROM 2 TO 10 SECONDS PRIOR TO HEATING TO PERMIT SAID COATING TO FLOW OUT INTO A SMOOTH EVEN FILM ON SAID SURFACE.