Blow box for the drying section of a papermaking machine, method for sealing a pocket with a blow box in the drying section of a papermaking machine, and arrangement in a papermaking machine
US6247247A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/046
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
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 is arranged to eject air away from the space between a wire and the blow box and/or maintain an underpressure zone in this space. In the interface between the desired underpressure zone and an outside volume, the blow box is provided with a sealing element, 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 greater than the distance "d".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.