Method and apparatus for forming a non-silver scored metal end

Details Method and apparatus for forming a non-silver scored metal end Method and apparatus for forming a non-silver scored metal end

1980-10-24

1982-10-19

Rosenbaum, Mark

Sheet metal container making

Method

Forming or treating metallic closure

413 67, B21D 5144

Patent

active

043547842

ABSTRACT:
A non-silver scored metal end closure member, and an apparatus and method for forming the same, are disclosed, characterized by the provision of a continuous scoreline between the radius and central panel portions of the end. The scoreline includes, in cross-sectional profile, a horizontal flat bottom wall, and outwardly divergent outer and inner side walls. In the preferred embodiment of the invention, the scoreline is contained in the upper horizontal surface of the metal end, the other side wall of the scoreline being concave and having a radius less than that of the radius portion of the metal end, the bottom wall being tangent to the outer side wall. The inner side wall comprises either a flat surface arranged at an obtuse angle of about 165.degree. relative to the bottom wall, or a concave surface tangent to the bottom wall. In another modification, the inner side wall is concave and tangent to the bottom wall, the radius of the inner side wall being at least as great as that of the outer side wall. In a further embodiment, the outer and inner side walls are flat and are arranged to subtend an angle greater than 90.degree.. The scoreline is formed by a scoring die having an annular downwardly depending projection the cross-sectional profile of which corresponds with that of the scoreline.

REFERENCES:
patent: 3946683 (1976-03-01), Jordan
patent: 4122791 (1978-10-01), Brown

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