Abstract: The present invention relates to an apparatus for capping in succession containers transported on a conveyance device. The apparatus comprises a cap dispensing station for applying caps on the containers. The cap dispensing station includes a cap release passage, a gating unit and a movable cap ejector. The gating unit includes a barrier, capable to acquire either one of first and second operative positions, and a barrier drive mechanism. In the first operative position, the barrier at least partially closes the cap release passage for preventing a cap from freely travelling through the passage under the effect of gravity. In the second operative position, the barrier uncovers the cap release passage for allowing a cap to pass through the passage. The cap ejector engages the barrier drive mechanism such that the barrier drive mechanism causes the barrier to acquire the second operative position.