Method to improve the formation of a paper or paperboard web by pre-pressing in a twin-wire former

An apparatus for improving the structure of a paper web in a forming section of a paper making machine comprising:

• a pair of endless first fabrics supported so that a surface of one of said first fabrics travels proximate a surface of the other of said first fabrics along a portion of the length of said first fabrics;
• a head box positioned to eject a suspension of paper pulp therefrom between said first fabrics so that the ejected paper pulp starts to form a web between said first fabrics;
• a pair of endless second fabrics supported so that a surface of one of said second fabrics travels proximate a surface of the other of said second fabrics along a portion of the length of said second fabrics, said pair of second fabrics positioned to receive the paper web from said pair of first fabrics;
• and
• at least one pressure nip positioned to press the web between said second fabrics by passing said pair of second fabrics and the web sandwiched therebetween through said at least one pressure nip, the web being pressed such that water in the web is partially removed from the web, said at least one pressure nip being formed by a pair of rollers.