Openable can body
AssigneeElpatronic AG
InventorsPaul Opprecht, Werner Urech, Jurg Opprecht
Life of this patent
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Abstract
A can body is rolled from a sheet-metal blank (28) and has outer and inner longitudinal edges (12 and 14 respectively) which are welded to one another in an overlapping manner. Extending round the can body transversely to the longitudinal edges (12, 14) are two circumferential scorings (16) which define a tearing strip (18) laterally. The tearing strip (18) is extended by a tongue (20) which is welded onto the outer longitudinal edge (12) and which can be gripped by a key and rolled up. In a welding zone (42) which is adjacent to a starting scoring (30), the tearing strip (18) is stiffened by the welded-on tongue (20) in such a manner that it tears away from the can body reliably along the circumferential scorings (16) during the rolling up of the tongue (20).
Claims9
An openable can body (10) made from a sheet-metal blank (28) with
- an outer and an inner longitudinal edge (12 and 14 respectively) which are welded to one another in an overlapping manner,
- at least one pair of circumferential scorings (16), which extend around the can body (10) transversely to the longitudinal edges (12,14) and define a tearing strip laterally, and
- a tongue (20) which extends the tearing strip (18) beyond the outer longitudinal edge (12),
- characterized in that the inner longitudinal edge (12) and the outer longitudinal edge (14) of the blank are welded together with limited overlap to from a mash weld;
- and
- the tongue (20) is welded, as a separate sheet-metal part, to the outer longitudinal edge (12) by means of a separate weld overlying the mash weld.
Dependencies are inferred from the claim text.