Container lift tab

Details Container lift tab Container lift tab

1989-04-25

1991-04-16

Fidei, David T.

Receptacles

Closures

With closure opening arrangements for means

220270, 220273, B65D 4132

Patent

active

050075543

ABSTRACT:
A non-removable fulcrum-type lift tab, for opening a metal beverage container, is modified, by the inclusion of a lanced line at a position between the fulcrum pivoting line and the pushing end of the tab. The lanced line extends in a direction substantially perpendicular to the fulcrum-directed pushing force used to open the container, whereby, upon initial lifting of the tab, the lanced line opens, in a limited material separation. This results in substantially less lifting force (about 30% less), being needed to elevate the tab end about 1/4 inch (about 6 mm) for a finger to be more easily inserted for completion of the opening of the container. At this stage, the ends of the lanced line, such as in the configuration of drilled holes or inwardly arcuate lanced sections, stop continued material separation by providing a high resistance to such separation. Additional lifting force is then operatively directed only on the container-opening fulcrum, with the limited material separation not significantly affecting the actual opening of the container. The arcuate lanced sections also direct possible continued tearing away from the peripheral edges of the tab and serve to relieve premature breakage from bending. To further ease initial finger purchase, the end of the tab which is lifted is formed with a partial elevation.

REFERENCES:
patent: 3501046 (1970-03-01), Jasper et al.
patent: 3836038 (1974-09-01), Cudzik
patent: 3977561 (1976-08-01), Strobe et al.
patent: 4148410 (1979-04-01), Brown
patent: 4210257 (1980-07-01), Radtke
patent: 4416389 (1983-11-01), Wilkinson et al.
patent: 4465204 (1984-08-01), Kaminski et al.
patent: 4576304 (1986-03-01), Henning
patent: 4762245 (1988-08-01), Matsubayashi et al.

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