Containers and openers therefor

Claim 1

A SHEET METAL CONTAINER COMPRISING, IN COMBINATION, A RIGHT TUBULAR BODY INCLUDING A PERIPHERAL WALL HAVING AT ONE END THEREOF AN ANNULAR BODY HOOK TURNED BACK AND ENCIRCLING THE ADJACENT END OF SAID BODY WALL, SAID BODY HOOK INCLUDING A FLANGE RADIALLY OFFSET OUTWARDLY FROM THE ADJACENT SURFACE OF SAID BODY WALL AND JOINED TO THE ADJACENT END OF THE BODY WALL BY A ROUNDED CONNECTING PORTION WHICH TURNS RADIALLY AND PROGRESSIVELY INWARD FROM SAID FLANGE TO MERGE WITH THE ADJACENT END OF SAID BODY WALL, A COVER EXTENDING ACROSS ONE END OF THE CONTAINER AND INCLUDING A PERIPHERAL COVER HOOK ENCIRCLING SAID BODY HOOK, SAID COVER HOOK COMPRISING AN OUTER FOLD WHICH ENCIRCLES THE BODY HOOK FLANGE IN CLOSELY EMBRACING RELATIONSHIP AND AN INNER FOLD TURNED UNDER THE BODY HOOK FLANGE SO THAT THE BODY HOOK FLANGE FITS BETWEEN THE INNER AND OUTER FOLDS OF THE COVER HOOK, SAID COVER BEING SHAPED TO PROVIDE A CLOSURE PORTION OFFSET SUBSTANTIALLY INWARDLY OF THE END OF THE CONTAINER TO PROVIDE A CHUCK WALL HAVING SUBSTANTIAL AXIAL LENGTH AND FITTING SNUGLY AGAINST THE INNER SURFACE OF THE ADJACENT END OF THE BODY WALL FROM THE JUNCTURE OF SAID BODY HOOK WITH THE BODY WALL FOR A SUBSTANTIAL DISTANCE AXIALLY INWARD OF SAID JUNCTURE TO PROVIDE A COMPLEMENTARY CONTACT CLOSURE, THE END PORTION OF THE BODY WALL BEING SHAPED TO AVOID CONSTRICTION IN AN AXIALLY OUTWARD DIRECTION OF THE TRANSVERSE SECTIONAL AREA OF THE SPACE ENCIRCLED BY THE END PORTION OF THE BODY WALL ALONG THE CHUCK WALL, THE OUTER FOLD OF THE COVER HOOK BEING INTEGRALLY JOINED TO THE COVER THROUGH AN INTERVENING CONNECTING SEGMENT WHICH SNUGLY OVERLIES AT LEAST A PORTION OF THE ROUNDED CONNECTING PORTION OF THE BODY HOOK, SAID INTERVENING CONNECTING SEGMENT INCLUDING A CIRCUMFERENTIAL INDENTATION ADJACENT THE JUNCTURE OF SAID SEGMENT WITH THE OUTER FOLD OF THE COVER HOOK AND A CIRCUMFERENTIAL PROTUBERANCE BOUNDING THE AXIALLY OUTWARD SIDE OF SAID INDENTATION AND LOCATED TOWARD AND NOT BEYOND THE AXIALLY OUTERMOST EXTREMITY OF SAID CONNECTING SEGMENT WITH THE MINIMUM RADIAL DIMENSION OF SAID INDENTATION BEING SUBSTANTIALLY LESS THAN THE OUTERMOST RADIAL DIMENSION OF THE OUTER FOLD OF THE COVER HOOK AND WITH THE OUTERMOST RADIAL DIMENSION OF SAID PROTUBERANCE BEING SUBSTANTIALLY NO GREATER THAN THE OUTERMOST RADIAL DIMENSION OF THE OUTER FOLD OF THE COVER HOOK THEREBY PROTECTING THE PROTUBERANCE AND INDENTATION AGAINST DAMAGE FROM IMPACT, SAID PROTUBERANCE DEFINING INTERIORLY THEREOF AN ANNULAR SPACE WITH THE OUTERMOST RADIAL DIMENSION THEREOF SUBSTANTIALLY LESS THAN THE OUTERMOST RADIAL DIMENSION OF THE OUTER FOLD OF THE COVER HOOK.