Method of coating metal with vinyl resin

Claim 1

A METHOD OF COATING METAL ARTICLES COMPRISING MIXING WITH VINYL RESIN PARTICLES MOSTLY SMALLER THAN 40 MESH, 50% TO 80% OF WHICH ARE SMALLER THAN 100 MESH AND 35% TO 55% SMALLER THAN 140 MESH, FROM 5 TO 40% OF A LIQUID PLASTICIZER FROM SUCH RESIN AND FROM 1 TO 10% OF A LIQUID STABILIZER FOR SAID RESIN, EACH BASED ON THE WEIGHT OF THE RESIN PATICLES, HEATING THE MIXTURE TO A TEMPERATURE FROM 100 TO 250* F., COOLING THE MIXTURE, THEN ADDING FROM 2 TO 5% OF COHESION-PREVENTIVE PARTICLES LESS THAN 10 MICRONS IN SIZE, BASED ON THE WEIGHT OF THE MIXTURE, MILLING THE RESULTING MIXTURE THEREBY BREAKING UP ANY LUMPS EXISTING THEREIN AND RESTORING IT TO GRANULAR FORM, AND THEN DISCHARGING THE RESULTING GRANULAR MIXTURE IN A GAS STREAM ONTO THE SURFACE OF THE ARTICLES AFTER PREHEATING THEM TO A TEMPERATURE AT WHICH SAID RESIN PARTICLES FUSE AND COALESCE ON STRIKING THE ARTICLES, AND AFTER COATING THE PREHEATED ARTICLES WITH A PRIMER SOLUTION OF SYNTHETIC RESIN IN AN ORGANIC SOLVENT.

Claim 2

A METHOD OF COATING METAL ARTICLES COMPRISING MIXING WITH VINYL RESIN PARTICLES MOSTLY SMALLER THAN 40 MESH, 50% TO 80% OF WHICH ARE SMALLER THAN 100 MESH AND 35% TO 55% SMALLER THAN 140 MESH, FROM 5 TO 40% OF A LIQUID PLASTICIZER FROM SUCH RESIN AND FROM 1 TO 10% OF A LIQUID STABILIZER FOR SAID RESIN, EACH BASED ON THE WEIGHT OF THE RESIN PATICLES, HEATING THE MIXTURE TO A TEMPERATURE FROM 100 TO 250* F., COOLING THE MIXTURE, THEN ADDING FROM 2 TO 5% OF COHESION-PREVENTIVE PARTICLES LESS THAN 10 MICRONS IN SIZE, BASED ON THE WEIGHT OF THE MIXTURE, MILLING THE RESULTING MIXTURE THEREBY BREAKING UP ANY LUMPS EXISTING THEREIN AND RESTORING IT TO GRANULAR FORM, AND THEN DISCHARGING THE RESULTING GRANULAR MIXTURE IN A GAS STREAM ONTO THE SURFACE OF THE ARTICLES AFTER PREHEATING THEM TO A TEMPERATURE AT WHICH SAID RESIN PARTICLES FUSE AND COALESCE ON STRIKING THE ARTICLES, AND AFTER COATING THE PREHEATED ARTICLES WITH A PRIMER SOLUTION OF SYNTHETIC RESIN IN AN ORGANIC SOLVENT.