| 摘要 |
A press with extended nip is disclosed for a paper or paperboard machine. In the embodiment disclosed, it comprises a support roll (2) acting as a counter member, and a pressure developing arrangement (5, 4) acting against the surface of the roll (2). The pressure developing arrangement includes a press shoe (5) acting against a water impervious belt (3) which, in turn supports a dewatering felt (6) supporting a paper or paperboard web (1) to be dewatered in the press. The press shoe (5) is operatively associated with a plurality of piston rods ¢21 ) of hydraulic cylinders (17) in the base (16) of the pressure developing arrangement (4, 5). At a downstream end of the press shoe (5), a bearing arrangement (34 - 36) prevents the shoe (5) from displacement in the direction of movement of the web (1) through the press nip, while still allowing its freely floating nature relative to the surface of the support roll (2), thus allowing a high pressure acting at the pressure shoe (5) without the danger of misplacement of the shoe in the direction of advance of the web, which might result in serious damage to the press. |
