| 摘要 |
An extended nip press for a paper machine for removing water from a wet paper, cardboard or similar fibrous or porous web. The press comprises a rotating press roll and at least one stationary loading shoe as well as a band impermeable to a medium and movable between said press roll and loading shoe. The loading shoe is provided with a sliding surface against which the press roll is pressed through the band for forming an extended press zone. A paper web to be dried is passed through the press zone together with a felt for receiving water. The band is made compressible, and in its surface facing the sliding surface are formed a plurality of separated recesses into which a lubricating medium is sprayed. The band is compressed in the press zone under the action of the pressure force of the press roll, whereby the recesses are flattened and entirely closed, and their volume is reduced so that the lubricating medium is pressed in between the intermediate parts of the recesses and the sliding surface while producing a lubricating layer over the entire sliding surface. The press gap between the sliding surface and the press roll is tapered in a wedge shaped manner towards the outlet side of said sliding surface. |
