Apparatus for entraining and directing a wet paper web

Details Apparatus for entraining and directing a wet paper web Apparatus for entraining and directing a wet paper web

1986-07-07

1988-02-23

Levy, Stuart S.

Advancing material of indeterminate length

By fluid current

And web storage

162193, B65H 2014, D21F 142

Patent

active

047265027

ABSTRACT:
Apparatus for entraining and directing a wet paper web in a paper making process comprises a wall or plate defining an airfoil section and planar directing section. A curved wall wrapped around the airfoil section defining there between a narrow channel terminating in a mouth of a slot forms an air passage for direction of air over the airfoil section toward the directing section to form a force under the Coanda effect. Three jet nozzles are arranged respectively at ends of the slot and centrally of the slot for directing the web from a roller toward the Coanda effect. The curved surface terminates at a position forwardly of the center line of the airfoil section so as to reduce the angle through which the air turns in the Coanda effect and thus develop a gentle force. The slot is wider at the center than at the sides to develop a greater force at the center.

REFERENCES:
patent: 3999696 (1976-12-01), Reba et al.
patent: 4014487 (1977-03-01), Reba et al.
patent: 4136808 (1979-01-01), Reba
patent: 4147287 (1979-04-01), Reba
patent: 4186860 (1980-02-01), Reba

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