A procedure for the manufacture of shoes with a compact rubber shoulder and sole of spongy rubber, and apparatus for the realization of this procedure (Machine-translation by Google Translate, not legally binding)

摘要

Shoe manufacturing process with compact rubber shovel and fluffy rubber sole, characterized in that the rubber mixture has to form the shovel of the shoe is subjected in a mold to a prevulcanizaciºn, at high pressure, for the time necessary for the rubber be fixed, then interrupting the pressure, opening the mold and introducing the mixture of prepared rubber that has to form the fluffy sole of the footwear, in his case just with the insole, padding and compact rubber outsole that the footwear must wear, closing again the mold and continuing applying pressure and heat until the total vulcanization of the whole. (Machine-translation by Google Translate, not legally binding)