Apparatus for controlling the dewatering of a web in a fourdrinier fabric

摘要

Improved apparatus for controlling the dewatering of a web (44, 44') in a Fourdrinier fabric (20, 21) by submerged drainage apparatus in which air does not penetrate through the fiber/aqueous dispersion nor the formed web (44, 44'). The dewatering is accomplished by altering the natural tension of the meniscus of the water to induce enhanced drainage of water from the aqueous dispersion of paper making fibers in the fabric (20, 21) and replacement air for the water draining from the formed web (44, 44') is provided from beneath the lower fabric (20) and, if an upper fabric (21) is employed, from above the upper fabric (21).