Patent ID: 7713603

Claim:
A molded article, comprising: a wall of a fuel tank having an inner surface and an outer surface, wherein the outer surface includes-an undercut, wherein the undercut includes a first end and a second end, wherein the first end forms an entrance opening, a lateral surface, a pair of opposing side surfaces extending along a length of the undercut from the first end to the second end and wherein the pair of opposing side surfaces are connected by the lateral surface, wherein the pair of opposing side surfaces form a top opening extending along the length of the undercut from the first end to the second end, wherein the pair of opposing side surfaces and lateral surface form a cross-sectional passage accessible from the entrance opening and the top opening, wherein the cross-sectional passage decreases along the length of the undercut from the first end to the second end to provide the cross-sectional passage with a decrease in dimension along the length of the undercut from the first end to the second end.