Receptacles – Closures – With closure opening arrangements for means
Patent
1984-02-01
1985-03-12
Hall, George T.
Receptacles
Closures
With closure opening arrangements for means
B65D 1734
Patent
active
045039895
ABSTRACT:
An end structure for an easy opening container includes a rivet formed in a pour panel defined by a non-continuous scoreline. Upon rupture of the scoreline by a tab, which is affixed to the panel by the rivet, both the tab and pour panel are retained on the end wall. The scoreline may include a region of minimal residual in the region which is initially popped and regions of increased residual along the length of the scoreline in the direction of the fracture. The scoreline forward and adjacent to the rivet is of a configuration which includes changes of direction rather than being a smooth continuous curve and cooperates with the stepped scoreline to reduce blow-off. Also provided is a coined region radially outward of the rivet and the panel radius to create slack such that when the container is pressurized, the lifting end of the tab is forced downwardly. Associated with the coined region is a localized coined panel radius which controls the location of the possible end buckle to reduce scoreline fracture due to buckle. Provision is made to reduce laceration and an improved ring-pull tab acting as a Class 2 lever is disclosed.
REFERENCES:
patent: 3900128 (1975-08-01), Brown
patent: 4399925 (1983-08-01), Fundom
patent: 4416389 (1983-11-01), Wilkinson et al.
patent: 4417668 (1983-11-01), Stolle
Brown Omar L.
Peters Don B.
Schubert James R.
Fraze Ermal C.
Hall George T.
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