Industrial drums

An industrial drum constructed of synthetic resin material, said drum comprising:

• a generally tubular body member extending longitudinally between opposite ends;
• first and second end members, at least one of which is unitary with the tubular body member at one end thereof and closes said one end;
• the other of the ends of the tubular body member including an external thread integral therewith;
• the other of the end members including an internal thread generally complementary to the external thread;
• a cupped liner of relatively rigid synthetic resin material received within the tubular body member and having a tubular wall complementary thereto;
• a closed end complementary to the unitary end member;
• an opposite open end;
• and
• a lip at the open end of the liner, said lip including an annular portion turned longitudinally back toward the closed end and spaced laterally outwardly from the tubular wall of the liner, said annular portion being in the form of a thread complementary to the external thread of the tubular body and the internal thread of the other of the end members for reception between the external thread and the internal thread when the liner is in place within the drum and said other end member is threaded onto the tubular body member;
• the tubular body member, and at least the one of the end members unitary therewith, being rotationally molded of a crosslinkable high density polyethylene resin having the ability to crosslink as the drum is molded.

An industrial drum constructed of synthetic resin material and capable of being gripped by a clamp of a drum-handling apparatus to facilitate mechanized handling of the drum, said drum comprising:

• a generally tubular body member extending longitudinally between opposite ends and including a cylindrical side wall;
• first and second end members, at least one of which is unitary with the tubular body member at one end thereof and closes said one end, the first and second members each including a circular end wall;
• and
• at least one chime molded unitary with a member of the drum, the chime having a configuration including portions extending longitudinally and laterally outwardly for being gripped by the clamp of the drum-handling apparatus;
• the chime being annular and being located at the intersection of one of the end members and the body member so as to extend circumferentially around substantially the entire perimeter of said one of the end members, the longitudinally extending portion of the chime extending outwardly beyond the end wall of said one of the end members at said intersection and including an outer edge spaced longitudinally from said intersection, and the laterally extending portion of the chime extending laterally beyond the cylindrical side wall.

An industrial drum constructed of synthetic resin material, said drum comprising:

• a generally tubular body member extending longitudinally between opposite ends;
• and
• first and second end members, one of which is unitary with the tubular body member at one end thereof and closes said one end;
• an external thread integral with the other of the ends of the tubular body member;
• an internal thread on the other of the end members, said internal thread being generally complementary to the external thread;
• a cupped liner of relatively rigid synthetic resin material received within the tubular body member and having a tubular wall complementary thereto, a closed end complementary to the unitary end member, and an opposite open end;
• and
• a lip at the open end of the liner, said lip including an annular portion turned longitudinally back toward the closed end and spaced laterally outwardly from the tubular wall of the liner, said annular portion being in the form of a thread complementary to the external thread of the tubular body and the internal thread of the other of the end members for reception interjacent the external thread and the internal thread when the liner is in place within the drum and said other end member is threaded onto the tubular body member.

For use in an industrial drum having a generally tubular body member extending longitudinally between opposite ends, first and second end members, one of which is unitary with the tubular body member at one end thereof and closes said one end, an external thread integral with the other of the ends of the tubular body member, and an internal thread on the other of the end members, said internal thread being generally complementary to the external thread, the improvement comprising:

• a cupped liner of relatively rigid synthetic resin material for reception within the tubular body member, said cupped liner having
• a tubular wall complementary to the tubular body member;
• a closed end complementary to the unitary end member;
• an opposite open end;
• and
• a lip at the open end of the liner, said lip including an annular portion turned longitudinally back toward the closed end and spaced laterally outwardly from the tubular wall of the liner, said annular portion being in the form of a thread complementary to the external thread of the tubular body and the internal thread of the other of the end members for reception interjacent the external thread and the internal thread when the liner is in place within the drum and said other end member is threaded onto the tubular body member.