| 摘要 |
A blow box used in the drying section of a papermaking machine and a method for sealing a pocket provided with a blow box, and a blow nozzle. The blow box (10) is arranged to eject air away from the space (38) between the supporting fabric (16) and the blow box and/or maintain an underpressure zone in this space. In the interface between the desired underpressure zone and the area remaining outside, the blow box is provided with a sealing element (46), such as a blow nozzle, protruding towards the wire to a certain distance "d" seen from the wire, for forming a seal between the underpressure zone and the area remaining outside the underpressure zone. The sealing element is connected to the blow box so that the element may be moved away from the wire to a distance "D" by a push and/or by an actuator, the distance "D" being longer than the distance "d". |
