PAPER FORMING ACTIVITY CONTROL WITH LIFTING VARIABLE INERTIAL STIMULATION BLADES WITH LIMITED-VENT INDENTED-SURFACES

摘要

A papermaking apparatus such as a Fourdrinier table which includes a long blade (10) and a trail blade (14). In the first aspect of the invention, the long blade includes an upper undulated surface (12) with vents (18) passing from the upper undulated surface (12) to the lower surface of the long blade (10) which is at substantially atmospheric pressure. In the second aspect of the invention, the trail blade (14) includes an elevator-type device (22) for adjusting the vertical position of the trail blade (14). The first and second aspects may be used independently or simultaneously.