Sealing nozzle arranged in a blow box used in the drying section of a paper machine
US6317999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/042
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sealing nozzle is positioned in a blow box used in the drying section of a paper machine. The blow box is mounted on that side of the supporting fabric, which is away from the web at the opening gap between the supporting fabric and the cylinder and at a distance "D" from the supporting fabric. A passage is formed between the blow box and the supporting fabric, the passage having a negative pressure region having a border with a region outside the negative pressure region. The sealing nozzle is positioned in a wall of the blow box facing the passage at a distance "d" from the supporting fabric. The sealing nozzle includes: a pivotal sealing member mounted at the border, and a transverse support element, the sealing member pivotal about the transverse support element; and a separate nozzle part having at least one nozzle opening (e. g. a substantially transverse slit) and disposed in the negative pressure region in front of the pivotal sealing member, the separate nozzle part positioned so that the at least one nozzle opening blows air along a surface of the sealing member from the negative pressure region to the region outside the negative pressure region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.