the following the material coming out of the head box 1 is dewatered on the bottom wire 2 in the same way as in the conventional fourdrinier dewatering section the amount of drainage and the phenomenon of material jumping on the wire vary depending on the angle of the foils as is known therefore the formation of paper is adjusted by altering a combination and arrangement of a plurality of foils with different angles depending on a type of paper and the operation speed of a paper machine in the fourdrinier machine since the upper surface of the material is free the dewatering pressure applied to the material before and after it passes the foils is not high the retention of fines in the dewatering section of the fourdrinier is high compared with a former in which the material is sandwiched between the two wires immediately after coming from the head box and is dewatered by members called 34 shoes 34 which are similar to the foils the angle of a foil and vacuum pressure of the vacuum foil box 5 are adjusted so that the thickness and the consistency of the material may be appropriate for the successive process where the material is sandwiched between the twin wires since the material which is sandwiched between the twin wires is first dewatered upwardly on the circumference of the roll 7 the amount of drainage on the upper side is.