can be seen in fig1 white water 8 is located within headbox chamber 4 such that an air pad 6 is also located within headbox chamber 4 in this manner as the pulp is being translated along conduit 12 to venturi manifold 22 white water 8 is also being introduced into venturi manifold 22 after the introduction of pulp into venturi manifold 22 in particular in the area of venturi section 28 the pulp and white water are mixed by venturi 28 such that a homogeneous mixture of the pulp and white water is achieved as can be seen in fig2 the venturi manifold 22 has a plurality of venturis spaced transversely across the headbox chamber 4 likwise the pulp conduit 12 is a plurality of pulp conduits spaced transversely across the headbox chamber 4 with a respective pulp conduit located adjacent to a respective venturi after the pulp and the white water are mixed in the venturi manifold 22 this mixture is translated to adjustable slice 24 after the pulp and white water mixtures leave adjustable slice 24 the mixture is placed upon breast roll 26 in order to began the formation of a paper or paperboard web not shown it is to be understood that pulp flow regulating valve 14 and white water flow regulating valve 20 are used to control the flow of pulp and white water to.