Blowing apparatus in a paper machine or the like
US6574884B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2002 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Jan 17, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/046
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The blowing device comprises a blow box (30) which is arranged at the opening nip (22) between the wire and the cylinder and which is provided with at least two nozzles (36; 44, 46) or the like arranged close to the wire or the like. The first nozzle (36) is arranged at the opening nip (22) between the wire and the cylinder, for blowing air away from the gap (34) between the wire and the blowing device. The second nozzle (44, 46) is arranged at a distance from said opening nip, in the wire travel direction. The air jets discharged from the nozzles maintain a negative pressure in the space between the blowing device and the wire. In the blowing device, at a short distance from the opening nip, there is further arranged a throttling means (50) projecting toward the wire, the throttling means dividing the negative pressure space formed between the first nozzle and the second nozzle into an intensified negative pressure region (34′) bordering to the location of the opening nip and into a second lower negative pressure region (34″, 20′).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.