Method and apparatus for decurling web material.

摘要

In a steam decurling method and apparatus in which a web is passed through a steam treatment station and one surface of the web is subjected to a steam shower, improved decurling is achieved by maintaining a substantially constant distance between the web and the source of the steam shower by directing a gas flow obliquely towards the web from a gas source disposed adjacent the opposite surface of the web from the steam shower, in a manner such that the gas flow is substantially parallel to the web after the gas flow has impinged on the web. The gas source is preferably an air foil assembly. The web may be of coated or uncoated paper.