Patent ID: 6372092
Filing Date: 2002-04-16
Classification: D21F

Abstract:
A headbox of a paper machine comprising:at least one material suspension supplying system; a headbox nozzle including a first dividing wall having a machine width and a second dividing wall having a machine width; said first and second dividing walls being arranged to form a first path in which a total nozzle-cross-section steadily and continually decreases in a material flow direction and to form a second path, arranged to directly follow said first path, in which a total nozzle cross-section continually increases in the material flow direction; a length L2 of said second flow path is shorter than a length L1 of the first flow path; said first and second walls being farther arranged to form a third path in which a total nozzle cross-section steadily and continually decreases; and said third path being positioned to directly follow said second path, wherein a length L3 of said third path is shorter than the length of L2.