Patent ID: 8303885

Claim:
A method of manufacturing an article of footwear having an upper and a sole structure, comprising: placing a polymer material into a mold having the general shape and configuration of a single midsole, the mold comprising a plurality of blades that includes a first blade and a second blade, the first blade being positioned to form a first sipe in the single midsole and the second blade being positioned to form a second sipe in that midsole, the first sipe extending across a lateral width of that midsole and the second sipe extending in a direction of a longitudinal length of that midsole, wherein the first blade and the second blade have different thicknesses; and removing the polymer material from the mold and separating the blades from the sipes of the single midsole, wherein one of the first and second sipes permits a greater degree of reverse flex than the other of the first and second sipes; and securing the midsole to the upper, thereby forming the article of footwear.