Method and apparatus for enhancing seam unifority in spirally wound tubes
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United States of America Patent
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Nov 10, 1998
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N/A
app pub date -
Jul 17, 1996
filing date -
Jul 17, 1996
priority date (Note) -
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Abstract
The invention provides a method and apparatus for spirally winding a tube of enhanced spiral seam uniformity that is simple and reliable. The spirally wound tube is formed using a spiral pitch control surface that engages with an exterior or interior cylindrical surface of a spirally wound tube and constrains movement of the tube to a predetermined spiral rotation as it is formed on a cylindrical stationary mandrel. Preferably, the pitch control surface comprises a tube engaging surface positioned along at least one spirally aligned portion of the exterior portion of the tube forming mandrel.
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