The containers are manually placed into a recess made to measure according to the provided samples. The trolley-socket slides on two parallel guides. The correct centering of the socket in correspondence of the dosing head and the welding is ensured by two limit sensors. The drive of the dosing and welding operations by means of two buttons that, engaging both hands of the operator, is in line with the current safety standards. The standard equipment of the machine includes an adjustable volumetric dosing from 10 to 350 ml. , A 25 liter hopper and a soldering iron with a plate made to measure according to the supplied samples. The structure is made of anodized aluminum and stainless steel with adjustable feet. IP65 electric panel with control systems and regulation of time and sealing temperature.