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Abstract

Abstract A BARREL OF SYNTHETIC PLASTIC MATERIAL INCLUDES A SUBSTANTIALLY CYLINDRICAL MAIN BODY PORTION AND A HEAD PORTION AT ONE AXIAL END AND OF ONE PIECE WITH THE MAIN BODY PORTION. THE HEAD PORTION HAS A CIRCUMFERENTIAL WALL HAVING A FIRST ANNULAR SECTION SUBSTANTIALLY PARALLEL WITH THE LONGITUDINAL AXIS OF THE MAIN BODY PORTION, A SECOND ANNULAR SECTION INCLINED INWARDLY AT A GREATER ANGLE AND A THIRD ANNULAR SECTION PROJECTING AXIALLY FROM THE SECOND SECTION AND INCLINED INWARDLY AT A LESSER ANGLE. THE THIRD SECTION HAS AN OUTER FREE EDGE PROVIDED WITH A RADIALLY OUTWARDLY PROJECTING CIRCUMFERENTIAL BEAD AND AN INNER FREE EDGE BOUNDING AN OPENING. A COVER OF SYNTHETIC PLASTIC MATERIAL OVERLIES THE HEAD PORTION AND COMPRISES AN OUTER ANNULAR RIM PORTION OF WHICH EXTERIORLY SURROUNDS THE HEAD PORTION AND HAS A CIRCUMFERENTIAL RIB ABUTTING THE SECOND AND THIRD SECTIONS AND ENGAGING BENEATH THE BEAD, AND INNER ANNULAR RIM PORTION PROJECTING INTO THE OPENING PROXIMAL TO THE INNER FREE EDGE, AND A TRANSVERSE PORTION OF ONE PIECE WITH THE INNER ANNULAR RIM PORTION SPANNING THE OPENING. A SEALING ELEMENT IS SEALINGLY CONFINED BETWEEN AND IN ABUTMENT WITH THE SECOND ANNULAR SECTION, THE OUTER RIM PORTION AND THE RIB. AT LEAST ONE STRAP ELEMENT ENCIRCLES THE OUTER RIM PORTION AND TIGHTLY URGES THE SAME INTO CONTACT WITH THE FIRST ANNULAR SECTION.

Inventors

• 👤 Wilhelm Hammes

Bibliographic Details