Device for seal testing containers

Claim 1

A TESTING APPARATUS FOR DETERMINING THE CAPACITY OF A CONTAINER TO BE SEALED AT ITS OPEN END AND COMPRISING A TESTING BLOCK ASSEMBLY HAVING AN ANNULAR BOTTOM RECESS, AND ANNULAR SEAL MOVABLY DISPOSED IN SAID RECESS, A RESILIENT DIAPHRAGM, SECURED IN SAID RECESS OVER SAID ANNULAR SEAL, SAID DIAPHRAG, AND A PORTION OF SAID RECESS DEFINING A CLOSED CHAMBER, MEANS DEFINING A PASSAGEWAY IN SAID BLOCK ASSEMBLY TO SAID CLOSED CHAMBER FOR THE INTRODUCTION OF AIR UNDER PRESSURE OF CAUSING SAID DIAPHRAGM TO EXERT A DOWNWARD FORCE ON SAID ANNULAR SEAL, A FLUID MOTOR FOR MOVING SAID BLOCK ASSEMBLY DOWNWARDLY TO ENGAGE SAID SEAL WITH THE OPEN END OF A CONTAINER IN SAID RECESS, A ROD MEMBER EXTENDING DOWNWARDLY THROUGH SAID BLOCK ASSEMBLY, A COMPRESSION MEMBER SECURED TO SAID ROD MEMBER BELOW SAID BLOCK ASSEMBLY, A TOROIDAL SEAL SURROUNDING SAID ROD MEMBER AND POSITIONED BETWEEN SAID COMPRESSION MEMBER AND SAID BLOCK ASSEMBLY ADJACENT SAID RECESS WHEREBY THE TOROIDAL SEAL IS THRUST INTO THE INTERIOR OF THE CONTAINER WHEN SAID BLOCK ASSEMBLY IS MOVED DOWNWARDLY, SAID BLOCK ASSEMBLY AND SAID ROD MEMBER BEING THEREAFTER RELATIVELY MOVABLE BY SAID FLUID MOTOR TO DEFORM SAID TOROIDAL SEAL AND THEREBY FORCIBLE ENGAGE ITS PERIPHERY WITH THE INTERIOR OF THE CONTAINER OF DEFINE A CLOSED SPACE THEREIN IN COOPERATION WITH SAID ANNULAR SEAL OF SUBSTANTIALLY LESS VOLUME THAN THE CONTAINER, MEANS FOR DEFINING A SECOND CLOSED PASSAGEWAY IN SAID BLOCK ASSEMBLY TO SAID CLOSED SPACE FOR THE INTRODUCTION OF AIR UNDER PRESSURE, AND MEANS RESPONSIVE TO THE PRESSURE ESTABLISHED IN SAID CLOSED SPACE TO DETERMINE UNDESIRABLE LOSS OF PRESSURE CAUSED BY LEAKAGE PAST THE ANNULAR SEAL.