Thermo-welder for the sealing of bags and sacks of various dimensions, in two or three layers (polyester, aluminium and polyethylene). The conveyor belt lifts and lowers electrically according to the bags height; it carries the bags upright up to the welding elements.

The welding elements guarantee a perfect and uniform seal, with hot-printing of the expiry date up to 16 characters. The welding-bars can be easily and quickly opened for cleaning or date-changing operations. To guarantee a perfect sealing, either temperature-values and welding-times can be set independently.