METHOD OF FORMING A STRIP HAVING SUBSTANTIALLY DIFFERING THICKNESSES

摘要

A method of forming a strip having substantially differing thicknesses including a wide thinner section adjacent one edge and a thicker section adjacent the thinner section. The wide thinner section is formed by first rolling a longitudinal depressed indentation in the section of strip which will later be formed into the thinner section while providing an edge material portion between the indentation and the edge of the strip. Thereafter the strip is further rolled to further reduce the indentation and to reduce the edge material portion to form the thinner section.