Method and assembly for moistening a moving web or paperboard
AssigneeMetso Paper, Inc.
InventorsReijo Pietikainen, Henri Vaittinen, Heikki Kettunen, Markku Kojo
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Abstract
A method and assembly is disclosed for moistening a web to paper or paperboard, the assembly comprising a steam blow cavity open toward a moving web (1). The steam blow cavity houses spray nozzles (5, 6, 7) at least for injecting steam into the cavity so as to form a steam atmosphere therein. Additionally, the steam blow cavity houses spray nozzles (5, 6, 7) for spraying a mist of a heated liquid onto the web (1) within the thus formed steam atmosphere.
Claims34
A method for moistening a web of paper or paperboard comprising:
- forming a steam atmosphere in a steam blow cavity open toward the web by feeding steam into the cavity;
- and
- applying a spray of liquid heated to a temperature higher than an ambient temperature from at least one nozzle onto the web in the steam atmosphere.
An apparatus for moistening a web of paper or paperboard comprising:
- a steam blow cavity that is open toward a moving web;
- at least one nozzle for feeding at least steam into the steam blow cavity so as to form a steam atmosphere;
- and
- at least one nozzle for applying a spray of a liquid heated to a temperature higher than an ambient temperature onto the web in the steam atmosphere.
Dependencies are inferred from the claim text.