Sheet metal container making – Method – Forming or treating metallic closure
Patent
1987-11-25
1989-06-27
Crane, Daniel C.
Sheet metal container making
Method
Forming or treating metallic closure
413 2, B21D 5126
Patent
active
048424684
ABSTRACT:
Can-like containers are frequently closed or sealed with a diaphragm, the wall of which is provided with severance points, or the part of which that is U-shaped in cross section (3) covering the cut edge (15) of the can wall (17) is already located at least partially at a distance (a) from the nearly dish-shaped closure part (14). The diaphragm (14) according to the present invention has severance points that are formed by narrow ligaments (4) interrupted by cut-outs (5), said ligaments being arranged alternatingly along a circumferential line in the rim (2) of the diaphragm. A diaphragm for the closing of can-like containers is e.g. fabricated in that the foil is deep-drawn, and in the end phase of the closing movement cut-outs (5) are formed in its rim (2) by shearing edges (8 and 11). At least one shearing edge (8) is interrupted by notches (9), in the area of which ligaments (4) remain.
REFERENCES:
patent: 3741142 (1973-06-01), Stuard
patent: 3746202 (1973-07-01), Moller
patent: 3859942 (1975-01-01), Moller
patent: 4212409 (1980-07-01), Jeppsson
patent: 4333585 (1982-06-01), Del Bon
patent: 4433793 (1984-02-01), Ingemann
patent: 4691834 (1987-09-01), Bullock
Crane Daniel C.
Grabher Indosa-Macschinentou AG
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