Blow molded industrial drum
AssigneeNational Distillers and Chemical Corporation
InventorsJames B. Shaffer, Daniel Tomo, Chester Strohecker
Life of this patent
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Abstract
An industrial sized drum that may be blow-molded of polyethylene is constructed with integrally formed rolling hoops, a domed top having an interrupted chime of generally arcuate cross-section undercut on its interior side, necks extending upward from a pair of diametrically opposed bungholes, symmetrically disposed dimples in the drum top adjacent these necks to maintain ovalization. The necks are formed to facilitate crimp-type securement of closures by crimp-type techniques. The drum bottom is formed with a chime and a sump pad aligned with one of the bungholes.
Claims5
A drum blow-molded of plastic, said drum including a tubelike sidewall, a top and a bottom at opposite ends of said sidewall, a plurality of rolling hoops projecting outward from said sidewall, a hand-engageable top chime along the periphery of said top and a hand-engageable bottom chime along the periphery of said bottom, first and second bungholes in said top surrounded by respective first and second outwardly extending necks, said bungholes being located at depressed regions of said top that communicate with drainage interruptions in said top chime, and a sump pad formed in said bottom in alignment with one of said bungholes, each of the depressed regions being provided with a plurality of dimple formations symmetrically disposed about each of said first and second necks to maintain ovality of said necks during molding thereof.
A drum blow-molded of plastic, said drum including a tubelike sidewall, a top and a bottom at opposite ends of said sidewall, a plurality of rolling hoops projecting outward from said sidewall, a hand-engageable top chime along the periphery of said top and a hand-engageable bottom chime along the periphery of said bottom, first and second bungholes in said top surrounded by respective first and second outwardly extending necks, said bungholes being located at depressed regions of said top that communicate with drainage interruptions in said top chime, and a sump pad formed in said bottom in alignment with one of said bungholes, said top chime having a cross-section that is generally arcuate and is undercut in the interior side thereof along its bottom region.
Dependencies are inferred from the claim text.