Patent ID: 6886623

Claim:
A method for casting metal strip using a casting roll, a metal delivery system to deliver molten metal onto the casting surface of the casting roll and a roll brushing apparatus to clean the casting roll surface, the method comprising the steps of: rotating a main brush mounted to extend across the casting surface of the casting roll to tangentially engage-the peripheral longitudinal casting roll surface of the casting roll; rotating an elongate rotary sweeper brush mounted to extend across the casting surface of the casting roll to tangentially engage the casting roll surface of the casting roll in advance of the position of the main brush relative to the casting surface of the casting roll; driving the rotation of the sweeper brush in a direction opposite to the surface movement of the casting roll; moving the sweeper brush independently of the main brush into engagement with the casting roll surface of the casting roll near the beginning and end of each casting run and to disengage from the casting roll during normal casting operation; and moving-the main brush into engagement with the casting roll surface at least during normal casting operation.