Ventilator apparatus for inhibiting flutter in a web dryer

Details Ventilator apparatus for inhibiting flutter in a web dryer Ventilator apparatus for inhibiting flutter in a web dryer

1997-10-22

1999-03-16

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

D21F 500

Patent

active

058814728

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.

REFERENCES:
patent: 4485567 (1984-12-01), Ely
patent: 4516330 (1985-05-01), Eskelinen et al.
patent: 4669198 (1987-06-01), Wedel
patent: 5086571 (1992-02-01), Hietanen
patent: 5557863 (1996-09-01), Kokkala

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