Head seam for a pail.

摘要

The rim of a pail body is provided with a compound curl (46) for reception of a lid. The compound curl comprises a upper region (47) extending away from the wall (33) of the pail body on its outside, a lower region (48) extending from the outer periphery of the said upper region (47) towards the wall (33) of the pail body and a rim edge part which extends from the inner periphery of the said lower region (48) away from the wall (33) of the pail body and is intermediate the said upper (47) and lower (48) 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 (46) to form a seam therewith. The said lower region (48) and the said rim edge part constitute a smaller pre-curl within the compound curl (46) the rim edge part being spaced below the said upper region (47) so that in clamping on the lid, a region (100) of the said rim edge part is brought into supporting engagement with the said upper region (47).