Easy-open retained tab structure for beverage can

Details Easy-open retained tab structure for beverage can Easy-open retained tab structure for beverage can

1979-04-12

1981-03-24

Hall, George T.

Receptacles

Closures

With closure opening arrangements for means

B65D 4132

Patent

active

042575290

ABSTRACT:
A sheet metal container provided with easy-open, retained-tab, pour-feature opening structure is disclosed. An elongated tab opener is positioned with its longitudinal axis in substantially right-angled relationship to the longitudinal axis of an elongated scored tab to be moved out of the plane of the container wall panel. The tab opener is secured to the scored tab portion by a unitary rivet. Class 1 lever action, with high mechanical advantage due to location of the rivet near the working end of the tab opener which overlays the starting portion of the scoreline, provides ease of opening sheet metal containers including flat rolled steel containers. Either a lanced tab opener or a vent scoreline in the scored movable tab can be used to eliminate back tension in the sheet metal which ordinarily would oppose lifting of the handle end of the tab opener as Class 1 lever action is initiated. A triple-scoreline concept enables a reduction of residual scoreline metal at a primary scoreline and prevents random movement of score metal by placement of secondary scorelines adjacent to the primary scoreline.

REFERENCES:
patent: 3326406 (1967-06-01), Brown
patent: 3485410 (1969-12-01), Boik
patent: 3744667 (1973-07-01), Fraze et al.
patent: 3838788 (1974-10-01), Stargell
patent: 3967753 (1976-07-01), Cudzik

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