Patent ID: 8475762

Claim:
A method of providing an evenly mixed additive enhanced gypsum slurry to a web, comprising: inserting calcined gypsum and water into a mixing chamber of a mixer through at least one inlet of the mixing chamber; agitating the contents of the mixing chamber to form a slurry comprising an aqueous dispersion of the calcined gypsum; passing the slurry from an outlet of the mixer into a slurry dispensing apparatus including a conduit; introducing an additive into the slurry at a point along a length of the conduit in the slurry dispensing apparatus to achieve a flow stream of a slurry/additive mixture through the conduit; changing a direction of the flow stream while not changing a cross section of the flow stream, and thereafter, directing the flow stream through a linear leg of the conduit without changing a cross section of the flow stream or a direction of the flow stream, and thereafter, changing a direction of the flow stream while not changing a cross section of the flow stream, and thereafter expanding a cross section of the flow stream in the conduit while not changing a direction of the flow stream, all prior to the flow steam exiting from an outlet of the conduit.