The world's largest producer of denim fabrics, Cone Mills Corp, on Tuesday revealed its highest quarterly earnings for six years as it posted a second quarter net profit of $3.1 million compared to a net loss $26.5m in 2001. The North Carolina-based company, which also commissions printing of home furnishings fabrics, said that profit was better-than-expected and net sales climbed 3.4 per cent to $125.8m from $121.7m on the back of strong denim sales.