Patent ID: 7018680

Claim:
A method of coated paper manufacturing involving dry coating a surface of a continuous web of paper or paperboard, the method comprising the steps of: moving the continuous paper or paperboard web having a first surface defining a first side and a second surface defining a second side, between a first electrode at a first potential located on the first side and spaced from the first surface and a second electrode at a second opposite potential, located on the second side and spaced from the second surface; spraying a dry coating powder of 10.1–99.5 wt-% (dry weight) of inorganic material and 0.5–89.9 wt-% (dry weight) of a polymeric binder material on to the first surface of the paper or paperboard web to form a first coated surface, and on to the second surface of the paper or paperboard web to form a second coated surface, forming both the first and the second coated surfaces essentially simultaneously by utilizing the difference in the electric potential between the first potential and the second opposite potential; and finishing the first coated surface and the second surface by conveying the coated paper or paperboard web through a nip formed between two heated members.