Ventilator apparatus for inhibiting flutter in a web dryer
US5881472A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Oct 22, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/042
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A ventilator apparatus is disclosed for supplying air from a source of pressurized air between a dryer and a web supported by a felt extending around a roll of a single tier drying section. The apparatus includes a housing which is connected to the source of pressurized air. The housing defines a nozzle for directing a flow therethrough of a current of air. The flow is directed from the nozzle towards a diverging nip defined between the dryer and the web supported by the felt when the felt diverges away from the dryer prior to the felt extending around the roll. The arrangement is such that the flow of air compensates for an underpressure generated by the felt when diverging away from the dryer so that fluttering of the web is inhibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.