Paper coater apparatus and process

Gravure coating apparatus for applying coating material to a first side of a traveling continuous web to produce a smooth uniform coated surface on said web first side, comprising:

• a. means for continuously advancing said web over a transfer applicator roller;
• b. a gravure roll defining an engraved surface pattern engaging a resilient transfer roller, said resilient transfer applicator roller being of a width sufficient to contact the entire width of said continuous web, said transfer applicator roll being positioned for applying a coating to the entire width of the first side of said continuous web while said continuous web is formed as an arc over said transfer applicator roll;
• c. means for providing said coating material to said gravure roll;
• d. means for controlling the amount of coating material on said gravure roll prior to transfer of said coating material from said gravure roll to said transfer roll surface, said transfer applicator roll;
• and
• e. a kiss roller assembly mounted adjacent said transfer applicator roll, said kiss roll assembly comprising a mounting plate, two rollers mounted on said mounting plate and drive means to reciprocate said kiss roller assembly toward and away from said transfer applicator roll holding said web against said transfer applicator roll.

Gravure coating apparatus for applying coating material to a first side of a traveling continuous web to produce a smooth uniform coated surface on said web first side, comprising:

• a. means for continuously advancing said web in extended generally linear disposition;
• b. an impregnator apparatus, said impregnator apparatus apply a preselected amount of hydrogenated triglyceride to a corrugated paperboard to impregnate said corrugated paperboard;
• c. a gravure roll having an engraved surface pattern positioned for applying said coating to a resilient transfer roll, said coated transfer roll applying said coating to the first side of said continuous web while said continuous web is engaging said transfer roll;
• d. means for providing coating material to said gravure roll from a doctor blade assembly;
• e. means for controlling the amount of coating material on said gravure roll and said transfer roll prior to transfer of said coating material from said gravure roll to said transfer roll;
• and
• f. means for adjustably varying the speed of rotation of said gravure roll to produce a relative velocity difference between said web and said transfer roll, the rotational velocity of said gravure roll at the surface of said transfer roll being faster than the running velocity of said web to control the smoothness of coating applied to said web.