DISPOSITIVO E METODO PER IL RISCALDAMENTO DELLA SUPERFICIE INTERNADELL'ESTREMITA' APERTA DI CONTENITORI TUBOLARI IN PLASTICA.

摘要

A device for heating the inner surface of the open end of tubular plastic containers filled with doughy product includes a heating head (2) equipped with a tip (3). The cross-section of the tip (3) corresponds to the cross-section of the inner terminal part (7) of the containers (1). The tip (3) is introduced into the open end (5) of the containers (1) to heat it. The cross-section of the tip (3) increases progressively and continuously, beginning from its free end (10), from an extension smaller than the extension of the containers inner terminal part (7) up to an extension bigger than the extension of the containers inner terminal part (7). The head (2) and the tip (3) are heated by electric resistances (8) and have breather pipes (9) situated thereinside and allowing the air to go out from the container.