Head seam for a pail

Details Head seam for a pail Head seam for a pail

1987-04-14

1988-12-06

Hall, George T.

Receptacles

Closures

Removable closure retained by ductile in situ deformation

220 74, B65D 4110, B65D 4112

Patent

active

047890762

ABSTRACT:
The rim of a pail body is provided with a compound curl for reception of a lid. The compound curl comprises an upper region extending away from the wall of the pail body on its outside, a lower region extending from the outer periphery of the said upper region towards the wall of the pail body and a rim edge part which extends from the inner periphery of the said lower region away from the wall of the pail body and is intermediate the said upper and lower regions whereby a lid applied over the rim with the central part thereof located within said rim can be clamped onto the said compound curl to form a seam therewith. The said lower region and the said rim edge part constitute a smaller pre-curl within the compound curl, the rim edge being spaced below the said upper region so that in clamping on the lid, a region of the said rim edge part is brought into supporting engagement with the said upper region. Desirably the wall has three spaced-apart circumferential beads formed therein, the bead closest to the compound curl being shallower than a closely spaced pair of larger beads.

REFERENCES:
patent: 4513872 (1985-04-01), Bull

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