WELDING OSCILLATING WELDING ASSEMBLY FOR THERMOSOUDING THERMOPLASTIC FILM AND HORIZONTAL PACKAGING MACHINE FOR PACKAGING OBJECTS IN THERMOPLASTIC FILM HAVING SUCH AN OSCILLATING ASSEMBLY

摘要

The oscillating assembly 28 with a welding wire 35 comprises a welding wire 35 capable of being heated electrically, means for fixing this wire 35 in the vicinity of the moving thermoplastic film 16, a source 30 of electric current, and means for selectively connecting the source of electrical current to the wire 35. It also comprises means for oscillating the welding wire so that it successively presents newly heated surfaces against the film thermoplastic 16 scrolling. / P P Use in particular for high-speed heat sealing layers of a thermoplastic film running continuously in a horizontal packaging machine for packaging objects in such a film.