Application heads are used for automated operations. If material costs need to be reduced for larger quantities, the precision of a manual gun application is insufficient; available space do not allow for manual application or the adhesive application has to be monitored, then different types of application heads are used. They are then component parts (e.g. of a packaging machine) and are integrated into the master SPS control system. In the majority of cases, the application heads are integral and the work piece is positioned underneath them.