Slurry delivery conduit of mixer and slurry delivery method

A slurry delivery conduit for a mixer having a mixing area for mixing of a gypsum slurry to be fed onto a continuously conveyed sheet of paper for gypsum board liner, the conduit configuring a curved or L-shape fluid passage to discharge the slurry introduced from the mixing area, onto said sheet through a slurry discharge port, comprising:

• a tube having a center axis extending along a vertical direction, into which the slurry prepared in the mixing area is introduced,
• a rectilinear tube segment, which is in fluid communication with a fluid passage in said tube so that the slurry is introduced from the tube into the rectilinear tube segment,
• a branch part for branching the rectilinear tube segment, and
• a plurality of branch tube segments connected to the rectilinear tube segment through the branch part,
• wherein said rectilinear tube segment extends straightly on a downstream side in a conveying direction of said sheet to configure a rectilinear fluid passage for said slurry;
• wherein adjacent tube wall portions of said branch tube segments join together at said branch part to configure a V-shaped transverse or horizontal cross-section, and the adjacent branch tube segments extend from the branch part on the downstream side in the conveying direction, while diverging toward the downstream side at an angle in a range from 20 degrees to 150 degrees as seen in a plan view;
• and
• wherein said branch part splits an axial or rectilinear current of said slurry flowing out through said rectilinear tube segment and introduces branched streams of the slurry into said branch tube segments respectively, and each of the branch tube segments is provided with said slurry discharge port at a terminal end part of the branch tube segment on the downstream side, so as to discharge the branched stream through the port onto said sheet.