Drainage foil element having two wire bearing portions

摘要

A drainage foil providing improved fines retention and drainage stability when used in cooperation with the forming wire of a machine that forms a mat or web from a wet slurry. The foil has two wire-contacting surfaces a fixed distance apart with a suction-forming section and a drainage section between them. Forces effective on the foil during use are balanced so as to minimize torque around the foil mounting means.