Procedimento per la realizzazione di elementi con una o più cavità a pressione, apparecchiatura per la sua esecuzione ed elemento ottenuto con tale procedimento

摘要

The process concerns the realization of elements comprising sealed cavities filled with pressurized gas. Said process consists in arranging, in a pressurized chamber, sheets of plastic material; in forming, in at least one of said sheets, cavities which are filled with said pressurized gas; in closing and sealing said sheets according to a closed outline, in such a way as to form one or several closed cavities which, being situated in an ambient with normal pressure (atmospheric pressure) permits the expansion of the gas contained in said cavity or cavities.