Method for making plastic or metalloplastic flexible tubes
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United States of America Patent
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Issued Date -
Jan 26, 2006
app pub date -
Oct 21, 2003
filing date -
Oct 25, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention concerns a method for making flexible tube skirts comprising a step of making a cylindrical sleeve from a planar web including several plastic or metal layers followed by a step whereby said cylindrical sleeve is cut out to the desired length to obtain said skirts. It comprises a step prior to the step of making the cylindrical sleeve, wherein the web is subjected to a plastic deformation resulting in its being thinned by at least 0.5% or in producing a raised surface whereof the amplitude ranges at least between 1/30 and 5 times the thickness. The web is for instance passed through the air-gap between two substantially parallel rolls. Typically, the rolls exert on the web a force ranging between 2.5 and 500 newtons per millimetre of web width.
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