Multicompartment receptacle for the ingredients of a concrete mix

Claim 1

A RECEPTACLE COMPRISING AN OUTER FLEXIBLE TUBULAR WALL HAVING END PORTIONS THAT EXTEND RADIALLY INWARDLY AND THAT TERMINATE IN ANNULAR BEADS TAHT DEFINE CENTRAL END OPENINGS, SAID WALL COMPRISING SUPERPOSED PLIES OF TIRE FABRIC EXTENDING FROM BEAD TO BEAD AND COVERED EXTERIORLY AND INTERIORLY WITH RUBBER, ONE OF SAID END PORTIONS TAPERING TOWARD ITS BEAD, A PLATE CLOSING THE OPENING AT THE OTHER END OF SAID WALL, SAID PLATE BEING PROVIDED WITH A PERIPHERAL BEAD SEAT, AN INNER FLEXIBLE AND ELASTIC TUBULAR RUBBER WALL EXTENDING AXIALLY OF THE RECEPTACLE AND DIVIDING THE SAME INTO AN INNER COMPARTMENT AND AN OUTER COMPARTMENT SURROUNDING THE INNER COMPARTMENT, SAID INNER TUBULAR WALL HAVING ONE END OVERLYING SAID BEAD SEAT AND A SMALLER END ADJACENT THE OPPOSITE END OF THE RECEPTACLE, MEANS FOR CLAMPING THE LARGER END OF SAID INNER WALL TO SAID PLATE AND THE ADJACENT BEAD TO SAID BEAD SEAT, A SPIDER ATTACHED TO THE TAPERED END OF SAID OUTER WALL, SAID SPIDER HAVING AN OUTER BEAD SEATING RING, A CENTRAL HUB SUPPORTED WITHIN SAID RING AND PROVIDING A CENTRAL PASSAGE THROUGH SAID HUB TO OR FROM THE INNER COMPARTMENT AND AN OUTER PASSAGE BETWEEN SAID HUB AND SAID RING TO OR FROM THE OUTER COMPARTMENT, MEANS FOR CLAMPING THE SMALL END OF SAID INNER TUBULAR WALL TO SAID HUB, MEANS FOR CLAMPING THE BEAD AT THE TAPERED END OF SAID OUTER WALL TO SAID BEAD SEATING RING, AND MEANS FOR OPENING AND CLOSING SAID PASSAGE.