Patent ID: 8973779
Filing Date: 2015-03-10
Classification: B65D

Abstract:
1. A drum of thermoplastic synthetic material, the drum comprising: a drum wall; an upper head arranged at one end of said drum wall; a lower bottom arranged at another end of said drum wall; a circumferentially extending carrying and transport ring arranged on the drum wall in the vicinity of the upper head of the drum; a bunghole connection sleeve arranged in a trough-shaped indentation of the upper head in a rim area thereof; a stiffening hump extending integrally upwardly from the bottom section of the indentation of the upper head between the carrying and transport ring and the bunghole connection sleeve; a stiffening bead integrally formed on an inner side of the carrying and transport ring in the vicinity of the bunghole connection sleeve so as to oppose the stiffening hump, the stiffening bead being configured to remain undeformed to a predetermined magnitude of force so as to prevent damage to the bunghole connection sleeve, the stiffening bead being solid and increasing a cross section of the carrying and transport ring in the vicinity of the bunghole connection sleeve, said stiffening bead having a maximum cross section in the vicinity of the bunghole connection sleeve and a cross section that diminishes with distance away from the vicinity of the bunghole connection sleeve, said cross section of said stiffening bead diminishing from said maximum cross section in opposite axial directions.