Patent ID: 7631678
Filing Date: 2009-12-15
Classification: B23K,B29C,B29L,E01C,E04D,F23D,F24H,Y02B,Y10T

Abstract:
1. A hot air device for thermowelding a thermoweldable membrane, comprising: an air inlet for receiving air; a casing in fluid communication with the air inlet; a combustion chamber mounted within the casing and spaced apart therefrom to define a space therebetween, the chamber being delimited by a wall provided with a plurality of perforations allowing the air to flow into the chamber, the chamber comprising: an outlet portion in fluid communication with the combustion chamber for receiving the hot air from the combustion chamber and comprising a nozzle through which the hot air is expelled, the nozzle being sufficiently remote from the chamber so as to prevent producing the flame out therefrom; a blower operatively connected to the air inlet to force an airflow from the air inlet through the chamber and out from the nozzle.