Method and apparatus for selectively controlling the divided discharge of a paste substance from the cavities in a dispensing carrier

摘要

A method and apparatus of controlling the dividing of a paste composition from the dispensing cavities in a carrier in which floatable pistons in the cavities regulate the amount of paste composition which is discharged from the respective dispensing cavities. The stroke of each piston in its respective cavity is controlled in an operative state to regulate the amount of paste composition discharged from each cavity and each piston is selectively locked in its respective cavity in an inoperative state to prevent discharge of paste composition from the respective cavity. The selective locking of the piston in its inoperative state or keeping the piston in its operative state is effected by angularly positioning the piston in a selective first position in which a locking bar rides in a first cutout in the piston and the piston is in operative state and can undergo axial travel through its controlled stroke in its respective cavity and a second position in which the locking bar is engaged in a second cutout in the piston and the piston is in inoperative state and locked against axial travel in its respective cavity.