Sheet metal container making – Method – Forming or treating metallic closure
Patent
1993-07-29
1997-01-07
Seidleck, James J.
Sheet metal container making
Method
Forming or treating metallic closure
413 14, 413 15, 413 16, 413 17, 413 66, 72325, 29428, 29558, B21D 5144
Patent
active
055909930
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: 4576305 (1986-03-01), Saunders
patent: 5263354 (1993-11-01), Saunders
patent: 5347839 (1994-09-01), Saunders
Seidleck James J.
Weirton Steel Corporation
Williamson Michael A.
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