Heat sealing machinery, namely, heat sealing machines for industrial use; manual, semi-automatic and fully-automatic machinery for heat-sealing food packaging all being for industrial or commercial use; commercial packaging machinery; commercial packaging machinery for use with tray and/or film packaging materials; conveyors being machines; industrial conveyors; conveyors, in particular roller conveyors, belt conveyors, band conveyors, strip conveyors, moving belt conveyors; belts for conveyors; belts for machines