| 摘要 |
Press section of a paper machine, in particular for printing paper qualities whose grammage is in the range of 40...80 g/m<2>. The press section comprises a pick-up roll (13), on whose suction zone (13a) the web (W) is detached at the pick-up point (P) from the forming wire (10) and is passed on the pick-up felt (15) into the first press nip in the press section, in which nip said pick-up felt (15) acts as a press fabric. After the first press nip the web (W) is transferred as a closed or open draw onto the drying wire (50) of the drying section, which nip is a roll nip. The press section is preceded by a wire nip (No, Npo) which dewaters the web (W) substantially and is formed between a press roll (11) placed inside the loop of the forming wire (10) and a hollow-faced (60') press roll (60) or a hose roll (20) which is provided with an extended-nip zone and which operates opposite to said press roll (11), and through which wire nip (No, Npo) a relatively open press fabric (61) is passed. <IMAGE>
|
