REINFORCED FLEXIBLE TUBING AND METHOD OF MAKING SAME
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jun 10, 2014
filing date -
Jun 11, 2013
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Abandoned
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Abstract
A method for making helically corrugated rubber tubing with a helical reinforcing element secured therein. A helical spring like element with axially spaced convolutions is slid onto a mandrel and a sleeve formed of uncured rubber is slid over the spring like element. The mandrel is then rotated about its axis and a flexible cord is wrapped around the sleeve to press portions of the sleeve into the spaces between adjacent convolutions of the spring like element and form helical corrugations. The resulting assembly is then placed in an oven to cure the rubber sleeve after which the cord is removed. The finished product is then removed from the mandrel.
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