Easy-access sheet metal container structures

Details Easy-access sheet metal container structures Easy-access sheet metal container structures

1996-11-22

1998-09-29

Dodson, Shelley A.

Sheet metal container making

Method

Forming or treating metallic closure

413 12, 413 13, 413 14, 413 15, 413 17, 413 66, 413 67, 428595, 428603, 72348, 220269, B21D 5144

Patent

active

058138110

ABSTRACT:
Scoreline, profiling and reinforcing features are provided for an easy-access sheet metal end closure (20) and an integral opener (44). An endwall panel (28) is formed so as to substantially eliminate flexing of the sheet metal during rupture of residual metal of scoreline means defining a U-shaped tear strip (30). Such tear strip is oriented with its arcuately-shaped closed end (32) contiguous to the periphery of such endwall panel -with scoreline legs (34, 35) directed toward a portion at its geometric center (26). The opener is fabricated with a chisel-point (92) at its working end (66) to initiate puncture of such arcuate-shaped scoreline by Class I lever action. Rupturing of the scoreline is followed by pivoting of the opener about a pair of fulcrum points, (82, 83) which contact the panel one each external to a, side of opening 62, with movement of the opening about such fulcrum points rupturing the scoreline legs by Class; II lever action. The opener and tear strip are retained and stored externally on the panel without obstructing the opening (62).

REFERENCES:
patent: 4096967 (1978-06-01), Kaminski
patent: 4530631 (1985-07-01), Kaminski et al.
patent: 4576305 (1986-03-01), Saunders

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