| 摘要 |
<p>The invention concerns a shoe (10) in an extended-nip press. The shoe is fitted to be placed in a nip (N) between a back-up roll (K1) and a belt-mantle roll (K2) inside the belt mantle (S). The shoe is pressed by means of an actuator, preferably a cylinder device, towards the back-up roll (K1), while the web (W) / felt or the felts (H1,H2) is/are placed between the back-up roll (K1) and the belt mantle (S). The shoe (10) comprises at least one chamber (12', 12''...) provided for hydraulic fluid, into which chamber the fluid is passed from a duct (15/15', 15'',15'''...). The shoe (10) comprises a first curved face (11), whose curve radius (R1) is substantially equal to the curve form of the back-up roll (K1). The shoe (10) comprises a second face (12), which forms the bottom of the chamber (12',12''...) provided for hydraulic fluid and which second face (12) joins said first face (11) and has been made with a larger curve radius (R2) than the first face (11). According to the invention, at the joint (C) between the first face (11) and the second face (12), the tangents (t1,t2) of the faces (11 and 12) are substantially the same. <IMAGE></p> |
