Cushman Darby & Cushman, L.L.P.
Process for manufacturing an ethylene vinyl acetate sole using first and second mold units
 A process for manufacturing an ethylene vinyl acetate (EVA) sole that involves weighing molding compounds for manufacturing the sole. The molding compounds include, by weight, 65-75% of ethylene vinyl acetate pellets, 3-5% of blowing agents, 20-30% of fillers, and 1-2% of crosslinking agents. The molded compounds are mixed, and extruded by means of a twin screw extruder so as to form a web of unfoamed extruded output. The web is cut into sheets. At least one of the sheets is placed into a first mold unit, which is heated and pressurized so as to form a rough foamed sole. The rough foamed sole is placed into a second mold unit, which is heated, pressurized, and cooled so as to form an embossed sole with a predetermined pattern. The embossed sole is trimmed so as to form a finished ethylene vinyl acetate sole. 
Taiwan Footwear Research Institute
B B
B29C B29D
inventional inventional
Jen-Hon Chung-Pin Yao-Pi Wun-Bin
Wu Chang Chung Yung