Flutter suppression air foils

Details Flutter suppression air foils Flutter suppression air foils

D - Textiles, Paper

21

F

D21F 7/00 (2006.01) B65H 23/24 (2006.01) F26B 13/00 (2006.01)

Patent

CA 2044013

FLUTTER SUPPRESSION AIR FOILS ABSTRACT Apparatus and methods for reducing the amplitude and frequency of web-edge flutter associated with drawing web materials are provided. The apparatus includes a pair of air foils disposed proximate to a pair of opposing planar surfaces of the web. Each of the air foils includes a first convex surface facing the web and disposed in contact with air flowing on the web for producing a venturi effect which reduces at least the flutter amplitude in the open draw.

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