Patent ID: 6254730
Filing Date: 2001-07-03
Classification: D21F,Y10T

Abstract:
An impact angle changing shower for spraying a fluid upon a moving belt surface while the belt travels at a pre-determined substantially constant belt velocity, the shower comprising:nozzle means, journaled for rotation about an axis transverse to the belt direction, and in communication with a source of pressurised fluid, for directing a fluid stream at a selected nozzle velocity and nozzle angle relative to a plane, wherein the plane is normal to the belt and intersects said axis transverse to the belt direction, the nozzle velocity comprising a belt velocity vector component parallel to the belt direction and an impact velocity vector at an impact angle defined relative to said normal transverse plane; androtary actuating means for selectively rotating the nozzle means about said axis between:a belt penetration position wherein the impact angle equals zero and the belt velocity vector component of the nozzle velocity is equal to the pre-determined substantially constant belt velocity; anda belt surface chiselling position wherein the impact angle is greater than zero and less than 90 degrees.