Fiberglass reinforced plastic lightweight heavy-duty ladder and method of making same
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United States of America Patent
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Oct 27, 2015
Grant Date -
Apr 17, 2014
app pub date -
Oct 15, 2013
filing date -
Oct 16, 2012
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Abstract
A fiberglass reinforced lightweight heavy-duty ladder, and method of making the same, is presented. The method includes impregnating rovings with a resin system and forming the impregnated rovings into a set of rails having a center portion, a left sidewall portion, and a right sidewall portion, where the left sidewall portion and the right sidewall portion each have an article roving density at least 10% greater than that of the center portion.
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