Receptacles – Closures – With closure opening arrangements for means
Patent
1976-07-01
1977-05-24
Hall, George T.
Receptacles
Closures
With closure opening arrangements for means
B65D 4132
Patent
active
040249816
ABSTRACT:
An improved easy-opening end structure includes a retained tab and a captured, retained panel, the latter defined by a scoreline and forming a pour opening upon fracture of the scoreline. The tab is fixed to the end wall, other than to the panel, and includes an opening end positioned over the panel and a lifting end spaced from the panel. The panel is connected by a retaining strip to the end wall, the retaining strip being formed between scoreline segments which are laterally located relative to the rivet. The rivet is surrounded by a rivet well of reduced thickness of material, a portion of the scoreline passing through the rivet well, while a coined formation defining a transition zone extends laterally of the rivet and overlies the portion of the scoreline located laterally of the rivet. The panel includes a depression formed therein forward of the retaining strip and located between the ends of a bead which is formed in the panel. The end wall also includes a bead which terminates in coined end sections, the end wall bead surrounding a portion of the scoreline and the coined sections being spaced on each side of the rivet. The tab operates to effect opening of the end structure by fracturing the portion of the scoreline forward of the rivet and thereafter bearing against the panel to effect progressive rupture of the scoreline by essentially a class 1 lever action, and to push the panel downwardly and laterally through the formed opening. The panel is joined to the end wall by the retaining strip and subsequent to rupture of the panel, the tab may be pushed back against the end wall and retained thereon.
REFERENCES:
patent: 3843011 (1974-10-01), Perry
patent: 3967752 (1976-07-01), Cudzik
patent: 3977561 (1976-08-01), Strove et al.
Fraze Ermal C.
Hall George T.
Smyth George F.
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