VARIABLE HYDRAULIC PULSE DRAINAGE CYLINDER FORMER

摘要

A cylinder former (10) having a variable hydraulic pulse whilst drainage, fo r use in papermaking comprising a drainage means comprising a cylinder mould (12) and a contoured member (34) adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through the fibe r suspension forming on the cylinder mould so as to improve sheet formation. A baffle (39) is provided in the discharge portion of the former to prevent stock build-up therein.