Can end

Details Can end Can end

2008-05-13

2008-05-13

Stashick, Anthony D. (Department: 3781)

Receptacles

End wall structure

Joint or seam between sidewall and end wall

C220S269000, C220S906000

Reexamination Certificate

active

07370774

ABSTRACT:
A can end having a countersink bead, an inclined chuck wall and a strong seam, resists distortion from its circular profile when subjected to thermal processing or when packaging carbonated beverages. This high hoop strength affects the manner in which the can end ultimately fails when placed under extreme abuse conditions, even if buckle pressure performance is within industry specified standards. The can end of the invention has control features introduced which control the failure mode whilst maintaining specified buckle pressure performance. In one embodiment, the control feature comprises expansion of the countersink bead to act as a trigger for local peaking, together with a groove in the chuck wall which prevents the peaking force from being concentrated at a single point which could result in leaking by the production of a pin hole.

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