1. Wet end

The wet section is made up of two elements:

• the headbox where a jet of dough is formed at a controlled and identical speed across the entire width of the sheet;

• the sheet-forming unit (flat table, twin-wire machine, former), consisting of one or two continuously rotating wires that receive the jet of pulp from the headbox. The fibers are gradually deposited and form the fibrous mat. The free water contained in the jet drips first by gravity through these cloths, then by vacuum through the various dripping devices described in paragraph 1.2 ...