Vane intended for a headbox of a paper machine and method for ensuring the straightness of a vane
AssigneeMetso Paper, Inc.
InventorsJarmo Kirvesmaki, Janne Lappi
Life of this patent
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Abstract
A vane intended for a headbox of a paper machine or equivalent is moistened and enclosed in a vapor-proof package to ensure the straightness of the vane. At least a portion of the vane is made of a water-absorbing material, such as plastic or a composite. Advantageously, the vane contains moisture in an amount that corresponds to the equilibrium moisture content of the vane in headbox conditions. It is enclosed in a package, preferably a vacuum package, which retains the moisture of the vane until the vane is put into use.
Claims20
1-13. (canceled)
A paper machine headbox vane assembly comprising:
- a paper machine headbox vane having a selected moisture level;
- and
- a vapor-proof package enclosing the vane.
A method for ensuring the straightness of a vane for a headbox of a paper machine comprising the steps of:
- moistening the vane to a selected moisture content followed by;
- enclosing the moistened vane in a vapor-proof package.
A method for ensuring the straightness of a vane for a headbox of a paper machine comprising the steps of:
- manufacturing the vane at least in part of a water-absorbing material;
- moistening the vane to a selected moisture content followed by;
- enclosing the moistened vane in a vapor-proof package;
- providing a vacuum to the vapor-proof package and closing the package air-tightly;
- transporting the vane in the package while retaining the selected moisture content;
- and
- before using the vane checking to see if the vacuum package remains unbroken, and if the vacuum package remains unbroken installing the vane in a headbox.
Dependencies are inferred from the claim text.