Patent ID: 6372091
Filing Date: 2002-04-16
Classification: D21F

Abstract:
Apparatus for the formation of a paper web from stock in a papermaking machine, the apparatus having at least two looped forming wire having inner and outer surfaces for travel in the direction of paper web formation, comprising:a headbox, forming a jet of stock for depositing stock onto the outer surfaces of the two forming wires to travel in a machine direction downstream thereon; a forming shoe means mounted in the apparatus within one of said two forming wires, the forming shoe means comprising at least one forming shoe having a leading edge and a face surface for engaging the said one forming wire, and over which said jet impinges, wherein, the at least one forming shoe has a multiplicity of grooves formed in the face surface which do not extend to the leading edge, and do not extend through the shoe, the grooves being positioned at an angle of 2 to about 20 degrees to the machine direction, as they extend to a trailing edge of the shoe, and the depth of the grooves gradually increasing from the point at which they start to the trailing edge, the face surface of the shoe along which the one wire travels having a convex curvature as the shoe extends in the machine direction.