Container with frangible seal for extrudable materials

Claim 1

A CYLINDRICAL CONTAINER PARTICULARLY DESIGNED FOR CONFINING AND DISPENSING UNDER PRESSURE PLASTIC EXTRUDABLE MATERIALS AND PROVIDED WITH A FRANGIBLE MEMBRANE FOR PREVENTING LEAKAGE OF THE MATERIAL INTO THE SPOUT UNTIL THE SAME IS TO BE DISPENSED UNDER PRESSURE, (A) SAID CONTAINER COMPRISING A HOLLOW CYLINDRICAL BODY MEMBER, HAVING A BODY WALL IMPERVIOUS TO THE MATERIAL TO BE CONFINED THEREIN AND DISPENSED THEREFROM, (B) A ONE-PIECE UNITARY METAL CLOSURE MEMBER HAVING (1) AN OUTER CIRCUMFERENTIAL CRIMPING PORTION TIGHTLY CLAMPED AROUND THE OUTSIDE OF ONE END OF SAID BODY, AND (2) AN ANNULAR GROOVE DEFINED BY A PAIR OF RADIALLY SPACED-APART WALL SEGMENTS, (A) THE OUTER WALL FORMING A CRIMP BACK-UP WALL RECEIVED WITHIN THE END PORTION OF THE CONTAINER BODY WALL AGAINST WHICH THE CRIMPING PORION IS CIRCUMFERENTIALLY CLAMPED, (B) THE INNER WALL SEGMENT DEFINING A FLANGE RECEIVING RECESS SPACED INWARDLY FROM THE INSIDE SURFACE OF SAID BODY WALL AND HAVING A SPOUT RECEIVING OPENING THROUGH THE RECESS PORTION, THE DIAMETER OF SAID OPENING BEING LESS THAN THE INSIDE DIAMETER OF SAID RECESS TO PROVIDE A FLANGE-RECEIVING SEAT, SAID RECESS EXTENDING OUTWARDLY IN AN AXIAL DIRECTION OF THE PLANE DEFINED BY THE INSIDE SURFACE OF THE PORTION OF THE CLOSURE MEMBER FORMING SAID ANNULAR GROOVE, (C) A HOLLOW SPOUT SECTION HAVING A SEALING AND RETAINING FLANGE ON THE INNER END THEREOF, (1) SAID FLANGE EING OF SUBSTANTIALLY THE SAME DIAMETER AS THE INSIDE DIAMETER OF SAID RECESS, (D) A FRANGIBLE MEMBRANE COVERING THE INNER END OF SAID SPOUT FLANGE AND SURROUNDING THE FLANGE, SAID MEMBRANE BEING OF A MATERIAL TO BE BROKEN TO PERMIT EXTRUSION OF THE PLASTIC MATERIAL THROUGH SAID SPOUT, (E) SAID SPOUT SECTION BEING INSERTED THROUGH THE OPENING OF SAID CLOSURE WITH THE FLANGE AND SURROUNDING PORTION OF THE MEMBRANE SEATED IN CLOSE FITTING RELATION IN SAID RECESS TO TIGHTLY CLAMP SAID MEMBRANE IN WRAPPED RELATION AROUND SAID FLANGE AND CLOSING THE OPENING AT THE INNER END OF THE SPOUT SECTION, (F) THE INNER SURFACE OF SAID FLANGE WITH THE MEMBRANE THEREACROSS LYING SUBSTANTIALLY IN THE PLATE OF SAID INNER CLOSURE SURFACE, (G) THE PORTION OF SAID METAL CLOSURE DEFINING SAID RECESS AND SURROUNDING SAID FLANGE BEING OF A TYPE AND SHAPED TO PROVIDE A DOUBLE THICKNESS CLAMPING RING IN AN INTERMEDIATE PORTION THEREOF AND CLAMPED AROUND THE CIRCUMFERENTIAL MARGINAL PORTION OF SAID FLANGE AND MEMBRANE TO POSITIVELY HOLD THE SAME IN SEATED SEALED RELATION WITHIN SAID RECESS, (H) THE PORTION OF SAID CLOSURE RECESS SURROUNDING SAID OPENING ENGAGING SAID FLANGE AND MEMBRANE AND POSITIVELY RESTRINING SAID SPOUT DURING EXTRUSION OF THE MATERIAL THERETHROUGH, (I) SAID CLAMPING RING POSITIVELY RESTRAINING SAID SPOUT WHEN INWARDLY DIRECTED PRESSURE IS APPLIED THERETO DURING CONTACT WITH A SOLID SURFACE AND ALSO MAINTAINING THE SEALED RELATION BETWEE THE CLOSURE AND THE ENGAGED INNER FLANGE AND MEMBRANE SURFACE, AND (J) A PLUNGER SLIDABLY MOUNTED IN SAID BODY MEMBER FOR FORCIBLY EXTRUDING MATERIAL THROUGH SAID SPOUT.