2 a perfected system with its substantial device for the molding of hollow bodies based on thermoplastic materials (Machine-translation by Google Translate, not legally binding)

摘要

An improved system, with its substantial device for the molding of hollow bodies based on thermoplastic materials, characterized in that initially the mass of thermoplastic material is injected in the space comprised between two concentric tubes, the outside can be progressively removed, at the same time as by the interior is insulted by pressure gas passing through a unidirectional end valve, typical of these insulative mechanisms, so that the plastic material initially included between the two tubes, adapts to the interior shape of the enclosure by effect of the pressure gas, as the mobile tube is removed. (Machine-translation by Google Translate, not legally binding)