Mold for use in connection with the casting of transmission belts

Claim 1

A MOLD FOR CASTING FLEXIBLE BELTS WITH TEETH FROM CASTABLE MATERIAL ADAPTED AT ROOM TEMPERATURE TO SOLIDIFY AND TO BE FLEXIBLE, WHICH COMPRISES AN OUTER MOLD MEMBER HAVING A CONICAL INNER BOTTOM SURFACE AND AN ANNULAR WALL CONNECTED TO SAID BOTTOM AND CONFINING THEREWITH A CHAMBER ADAPTED TO RECEIVE CASTABLE MATERIAL, AN INNER MOLD MEMBER REMOVABLY INSERTABLE INTO AND RESTABLE ON THE INNER BOTTOM SURFACE OF SAID CHAMBER SO AS TO CONFINE WITH SAID OUTER MOLD MEMBER AN ANNULAR SPACE AND TO DISPLACE THEREINTO CASTABLE MATERIAL FROM SAID CHAMBER WHEN BEING INSERTED INTO THE LATTER, SAID INNER MOLD MEMBER HAVING A CONICAL BOTTOM SURFACE CONTIGUOUS WITH THE INNER BOTTOM SURFACE OF SAID OUTER MOLD MEMBERS WHEN SAID INNER MOLD MEMBER IS RESTED ON THE INNER BOTTOM SURFACE OF SAID CHAMBER, ONE WALL OF SAID ANNULAR SPACE BEING PROVIDED WITH TEETH AND THE OPPOSITE WALL OF SAID ANNULAR SPACE BEING PROVIDED WITH RIDGE-SHAPED SUPPORTING MEANS PROTRUDING INTO SAID ANNULAR SPACE FOR SUPPORTING THE WINDINGS OF A WIRE INSERT TO BE INCORPORATED IN THE BELT TO BE MOLDED, AND AIR VENTING MEANS COMMUNICATING WITH SAID ANNULAR SPACE DURING INSERTION OF SAID INNER MOLD MEMBER INTO SAID OUTER MOLD MEMBER FOR VENTING AIR FROM THE CASTABLE MATERIAL IN SAID MOLD DURING INSERTION OF SAID INNER MOLD MEMBER INTO SAID CHAMBER, SAID ANNULAR CHAMBER BEING PERMANENTLY OPEN TO THE ATMOSPHERE WHEN SAID MOLD MEMBERS ARE IN FULLY ASSEMBLED POSITION IN WHICH THE MOLDING OPERATION PROPER TAKES PLACE.