define a twin wire zone and an inlet or forming gap between the wires a pulp suspension layer or a pulp suspension jet is fed into the inlet or forming gap through a discharge duct of a headbox the former also includes as a combination a first forming suction roll arranged proximate the forming gap in a loop of one of the wires and a second forming suction roll arranged inside the loop of the wire opposite to the wire inside whose loop the first forming roll is arranged the forming suction rolls have suction zones over which the twin wire zone is curved on certain sectors in the suction zones the vacuum levels are arranged adjustable independently from one another and possibly relative to one another so as to minimize the unequalsidedness of the web after the second forming suction roll there is a pressure pulsation unit in the twin wire zone application_number US 51879395 A description referring to the accompanying drawings wherein the same reference numerals refer to the same or similar elements the paper machine formers shown in fig1 4 comprise a lower forming wire 10 which is guided in a loop by guide rolls 11 11b 11c a second forming suction roll 14 and a breast roll 11a fig1 and 4 or by guide rolls 11 11b 11c and a first forming suction roll 12 fig2 and 3 the formers comprise an upper forming wire 20 which is guided in a loop by guide rolls 21 and a first forming roll 22 fig1 and 4 or by guide rolls 21 a breast roll 21a and a second forming roll 24 fig2 and 3 a pulp suspension jet j is fed into a forming.