Patent ID: 7517407

Claim:
A paper coating device, comprising: a backing roll for continuously transferring paper web; a nozzle for injecting coating color to the paper web, the nozzle being disposed adjacent to a lower end of the backing roll; a coating blade for applying and metering the coating color onto the paper web in an evenly distributed manner; a profile tube configuring the profile of the coating blade; a means for cooling down the coating blade, the cooling means being installed to a void space between a reverse surface of the coating blade and the profile tube; and a coolant circulating system for forcibly circulating coolant through the cooling means, wherein the means for cooling consists of two pipes located at an upper part and a lower part of the reverse surface of the coating blade, respectively, and a plurality of spray nozzles installed on the pipes, the spray nozzles being spaced at regular intervals with each other, wherein the spray nozzles directly inject the coolant against the reverse surface of the coating blade.