Breather for die casting and other molds

Claim 1

IN A MOLD OMPRISING A PAIR OF METAL COMPONENTS MOVABLE INTO JUXTAPOSITION WITH EACH OTHER TO DEFINE A CAVITY INTO WHICH MOLTEN MATERIAL IS TO BE INTRODUCED UNDER PRESSURE, IN WHICH THE JUXTAPOSED SURFACES OF SAID COMPONENTS SEAL THE SAID CAVITY AGAINST THE PASSAGE BETEWEEN SAID SURFACES OF AIR OR GAS FROM THE MOLD CAVITY TO ATMOSPHERE INCIDENT TO SAID INTRODUCTION OF MOLTEN MATERIAL, THE PROVISION ON ONE OF SAID COMPONENTS OF A BREATHER PASSAGE MEANS ASSOCIATED WHOLLY WITH SAID ONE OF SAID COMPONENTS, SAID BREATHER PASSAGE MEANS INCLUDING RELATIVELY MOVING ELEMENTS CARRIED BY ONE ONLY OF SAID COMPONENTS, AND IN WHICH SAID MOLD INCLUDES MEANS FOR MOVING AT LEAST ONE OF SAID ELEMENTS INTO SUCH JUXTAPOSITION RELATIVE TO THE OTHER AS AN INCIDENT TO MOVING SAID COMPONENTS INTO MOLD CLOSING JUXTAPOSITION, SO THAT THE ENTRANCE TO SAID BREATHER PASSAGE MEANS IN SO REDUCED INWHICH BY SUCH MOVEMENT OF AT LEAST ONE OF SAID ELEMENTS THAT ONLY AIR AND GAS MAY PASS THERETHROUGH AND IN WHICH SAID RELATIVELY MOVABLE ELEMENTS INCLUDE AT LEAST ONE ELEMENT MOUNTED FOR MOVEMENT INTO AND OUT OF COOPERATIVE RELATIONSHIP WITH ANOTHER ELEMENT ON SAID ONE OF SAID MOLD COMPONENTS AS SAID MOLD IS CLOSED AND OPENED, RESPECTIVELY, WITH RESULTANT COMPLETION OF A BREATHER PASSAGE MEANS LEADING FROM THE MOLD CAVITY THROUGH SAID MOVABLY MOUNTED ONE OF SAID ELEMENTS TO A SURFACE THEREOF FORMING A PORTION OF THE EXTERIOR SURFACE OF SAID MOLD.