Abstract: A cylindrical printing roll is provided in combination with an endless conveyor that has a plurality of balloon carriers on the conveyor in uniformly spaced relation. Drive members connect to the conveyor for intermittent drive thereof, a printing station being provided on the conveyor course immediately adjacent the printing roll and each balloon carrier is stopped at such station, while devices for inflating a balloon on the carrier when stopped at the printing station and cylindrical rollers to press an inflated balloon at the printing station against the printing roll for printing action are also present.