Container and closure therefor

Claim 1

IN A DEVICE OF THE CHARACTER DESCRIBED, IN COMBINATION, (A) A CONTAINER HAVING A WALL DEFINING A DISPENSING OPENING THEREIN, AND WITH SAID WALL HAVING EXTERNAL SCREW THREADS THEREON, (B) A CLOSURE MEMBER HAVING AN END WALL AND A COLLAR PORTION DEPENDING FROM SAID END WALL WITH INTERNAL SCREW THREADS ON SAID COLLAR ENGAGEABLE WITH SAID THREADS ON THE WALL OF THE CONTAINER FOR BONDING THE CLOSURE MEMBER ONTO SAID CONTAINER IN CLOSING RELATION THERETO, (C) ONE OF SAID CONTAINER AND CLOSURE MEMBER BEING OF FORMABLE MATERIAL CHARACTERIZED BY BEING CAPABLE OF RETURNING TO ITS ORIGINAL SHAPE WHEN DEFORMING FORCES ARE REMOVED THEREFROM, (D) SAID CONTAINER WALL HAVING A SURFACE AT THE OUTER END OF SAID DISPENSING OPENING AND SAID CLOSURE MEMBER END WALL HAVING A SURFACE THAT COOPERATES THEREWITH, SAID SURFACES BEING MOVABLE INTO ENGAGEMENT IN RESPONSE TO SCREWING OF THE CLOSURE MEMBER ONTO SAID CONTAINER, AND (E) ONE OF SAID COOPERATING SURFACES HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED SERRATIONS WITH EACH SERRATION HAVING A FACE INCLINED AND TERMINATIING IN A SECOND FACE SUBSTANTIALLY PERPENDICULAR TO THE RESPECTIVE SURFACE, SAID SERRATIONS FORMING INTERLOCKING PORTIONS WITH SIMILAR SERRATIONS ON THE OTHER COOPERATING SURFACE THAT EXTEND TRANSVERSELY OF THE DIRECTION OF THE ROTATIVE MOVEMENT OF SAID COOPERATING SURFACE OF THE CLOSURE MEMBER TO RESIST LOOSENING OF THE CLOSURE MEMBER.