Headbox and manifold system for producing a multi-ply paper web

A headbox and manifold system in a paper machine having a rapport structure and a plurality of mixing systems for generating stock suspension flows of differing concentrations for producing a multi-ply paper comprising:

• a manifold for each ply of the multi-ply paper, each of said manifolds having distribution conduit arranged transverse to the paper machine direction for conveying one of said stock suspension flows, said manifolds affixed to the paper machine support structure;
• each of said manifolds having a plurality of equal length flexible lines providing fluid communication between each respective distribution conduit and a pivotable head box wherein said flexible lines permit relative movement between said headbox and said respectively manifolds without the use of compensators;
• said headbox supported by the paper machine support structure;
• a slice nozzle extending across an entire width of the multi-ply paper;
• said slice nozzle attached to and in fluid communication with said headbox, said plurality of stock suspension flows discharged by said slice nozzle;
• a turbulence generator for each of said plies located between said manifolds and said slice nozzle;
• and
• at least one second conduit for introducing a fluid into one of said stock suspension flows before said respective turbulence generator whereby said concentration of said stock suspension flow can be adjusted.