The passion scenes of the Wurzacher Altar: Restauration and painting technique

A self priming mechanism for a dispenser comprising a container attachment and a dip tube sealer. The container attachment may comprise a screw threaded cap, a mounting cup or any of the customary means to mount a dispenser on a container and includes an upper dip tube sealer housing which communicates with a dispensing structure such as a pump or a dispensing valve. The dip tube sealer comprises a seal collar movable between an open and a closed position. The collar has a dip tube tail upon which a dip tube is mounted extending downward through the container head space and into the product to be dispensed. The attachment and the dip tube sealer cooperatively form a feedback therebetween when the flexible collar is in the open position to permit air trapped within the dip tube during assembly to escape back to the head space. They also cooperatively form a pair of sealing surfaces therebetween to prevent flow through the feedback when the flexible collar is in the closed position.