Press felt and method of manufacturing it
AssigneeAlbany International Corp.
InventorsJan Rexfelt, Sven-Arne Svensson
Life of this patent
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Abstract
A press felt is devised for use in a papermaking machine, and a method is provided for manufacturing such a press felt. The press felt comprises a base fabric which is made of fabric of yarn material and is endless in the machine direction of the press felt, and one or more layers of fiber material arranged on the base fabric. The base fabric of the press felt comprises at least one layer composed of a spirally-wound strip made of fabric of yarn material and having a width which is smaller than the width of the final base fabric. Longitudinal threads of the spirally-wound fabric strip of yarn material make an angle with the machine direction of the press felt. The fabric strip of yarn material may advantageously be flat-woven.
Claims18
A press felt for a papermaking machine, comprising a woven base fabric which is made of yarn material and is endless in a machine direction of the press felt, and at least one layer of fiber material arranged on the base fabric, wherein said base fabric comprises at least one layer composed of a spirally-wound fabric strip made of yarn material and having a width which is smaller than a width of the base fabric, longitudinal threads of the spirally-wound fabric strip of yarn material making an angle with said machine direction of the press felt.
A method of manufacturing a press felt for use in a papermaking machine, said press felt having a base fabric which is made of yarn material and is endless in a machine direction of the press felt, and at least one layer of fiber material arranged on the base fabric, said method comprising the steps of:
- (a) manufacturing a fabric strip of yarn material, said fabric strip having longitudinal threads in a longitudinal direction of said fabric strip and presenting a width which is smaller than a width of the base fabric;
- (b) spirally winding said fabric strip of yarn material, to form in the base fabric a layer of fabric of yarn material, the longitudinal threads of the spirally-wound fabric strip of yarn material making an angle with said machine direction of the press felt;
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- (c) fixing said at least one layer of fiber material to the base fabric.
Dependencies are inferred from the claim text.