Method of forming a papermakers' felt
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United States of America Patent
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Jan 23, 2001
Grant Date -
N/A
app pub date -
Jul 22, 1999
filing date -
Jul 22, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of forming a papermakers' felt first comprises providing a needle loom having a needle board, a plurality of needles mounted on the needle board, and a needle motion unit. The needle motion unit moves the needle board such that the needles mounted thereon travel on a predetermined path that includes upward and downward segments, wherein each of the upward and downward segments includes both forward and rearward motion. The method then comprises the step of continuously conveying a base fabric and a batt web overlying the base fabric in a first direction past the needle board. The base fabric includes a first set of machine direction yarns and a first set of cross machine direction yarns interwoven with the first set of machine direction yarns in a predetermine repeating pattern, and the batt web comprises batt fibers. The next step of the method is inserting batt fibers from the batt web into the base fabric with the plurality of needles as the base fabric is conveyed past the needle board and as the needle board travels along the predetermined path to form a batt layer attached to and overlying the base fabric. This method can reduce or eliminate negative effects on press felts resulting from needling.
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