Sealing closure for lined drums

In a container for holding liquids, said container including a tubular drum formed of liquid-permeable material defining an end portion and an inner surface, and a liquid-impermeable liner facially juxtaposed to said drum inner surface, means for sealingly closing said drum at said end portion comprising:

• a closure formed of a synthetic resin having a central wall portion, an annular outer wall portion defining an annular raised boss having an arcuate cross section and including a peripheral portion, and a downturned distal flange extending from said peripheral portion and being provided with circumferential spaced slots, an end portion of said liner being disposed between said closure flange and said end portion of said drum;
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• a rigid clamp ring embracing said closure flange, said liner end portion, and said drum end portion, said clamp ring having an annular recess defined at an axially outer end thereof by an annular radially extending clamping wall portion, an annular retaining wall portion extending axially outwardly from said clamping wall portion, an annular turned end portion extending arcuately axially outwardly and radially inwardly from an outer end of said retaining wall portion, and an annular returned portion extending arcuately axially inwardly and radially outwardly from an axially inner end of said turned end portion, said returned portion of the clamp ring cooperating with said clamping wall portion to sealingly clamp said liner to said peripheral portion of the closure, and said retaining wall portion and turned end portion of the clamp ring cooperating with said peripheral portion and distal flange of the closure to sealingly clamp said liner thereto.

In a container for holding liquids, said container including a tubular drum formed of liquid-permeable material defining an opposite end portion and an inner surface, and a liquid-impermeable liner facially juxtaposed to said drum inner surface, means for sealingly closing said drum at each said end portion, each said closing means comprising:

• a closure formed of a synthetic resin having a central wall portion, a peripheral portion, and a turned distal flange provided with circumferential spaced slots, an end portion of said liner being disposed between said closure flange and said end portion of said drum;
• and
• a rigid clamp ring embracing said closure flange, said liner end portion, and said drum end portion, said clamp ring having an annular recess defined at an axially outer end thereof by an annular radially extending clamping wall portion, an annular retaining wall portion extending axially outwardly from said clamping wall portion, an annular turned end portion extending arcuately axially outwardly and radially inwardly from an outer end of said retaining wall portion, and an annular returned portion extending arcuately axially inwardly and radially outwardly from an axially inner end of said turned end portion, said returned portion of the clamp ring cooperating with said clamping wall portion to sealingly clamp said liner to said peripheral portion of the closure, and said retaining wall portion and turned end portion of the clamp ring cooperating with said peripheral portion and distal flange of the closure to sealingly clamp said liner thereto.