Receptacles – Closures – With closure opening arrangements for means
Patent
1989-04-26
1991-08-13
Marcus, Stephen
Receptacles
Closures
With closure opening arrangements for means
220270, 220273, 220276, 220 906, 413 12, 413 14, B65D 1734
Patent
active
050389564
DESCRIPTION:
BRIEF SUMMARY
This invention relates to end closure structure providing abuse-resistance in combination with controlled opening of a full-panel convenience-feature along with raw-edge metal shielding during and subsequent to opening; and, is concerned with methods and apparatus for fabrication of such closure structures in addition to opening methods.
In particular, this invention is concerned with providing a full-panel, convenience-feature end closure made from steel which can be readily opened while also providing shielding for raw edge residual scoreline metal to provide an improved type of protection not previously available in such full-panel easy-open art. In addition, this invention is concerned with providing increased strength for sheet metal easy-open end closures for protection against abuse during transportation, warehouse stacking and market handling.
The above and other contributions are considered in more detail in describing embodiments of the present invention shown in the accompanying drawings.
In such drawings:
FIG. 1 is a plan view of the exterior (public side) of an end closure structure embodying the invention;
FIG. 2 is a plan view from the interior (content side) of the end closure of FIG. 1;
FIGS. 3 and 4 are radial cross sectional views of the end closure structure of FIG. 1 along lines 3--3 and 4--4, respectively;
FIG. 5 is an enlarged view of a portion of the radial cross sectional view of FIG. 3 at a location diametrically opposite to the position of an integral opener for such end closure;
FIG. 6 is an enlarged cross section schematic view of a portion of an end wall panel for purposes of describing interrelated placement of portions of an end closure structure for operation of the working end of an integral opener as taught by the invention;
FIGS. 7-12 are cross-sectional views of tooling and end closure structure for purposes of describing sequential fabrication steps, in which:
FIG. 7 shows results of a blank forming stage,
FIG. 8 shows initial configuration formation of a shallow depth rivet button and a peripheral shock-absorbing bead,
FIG. 9 shows further forming of the rivet button and initiation of pre-folding of an inner multi-layer sheet metal fold for shielding residual torn metal remaining with a removable panel portion,
FIG. 10 shows scoring of the end wall panel and initiation of pre-folding of an outer multi-layer sheet metal fold for shielding residual torn metal remaining with the container,
FIG. 11 shows completion of such multi-layer sheet metal folds and forming profiling in a panel portion, and
FIG. 12 shows completing formation of the rivet securing an opener to the end wall panel; and
FIGS. 13 through 17 are perspective views of the end closure embodiment of FIG. 1 and a portion of a container for describing the opening procedure taught by the present invention.
In any of the known prior art "disc pull-out" ends, only a minor portion of the peripheral scoreline was ruptured by lever action. Such rupturing took place initially when the opener was lifted. Thereafter, the remainder of the peripheral scoreline was separated by pulling backwardly on the ring-pull of the opener. In general, such previously available disc pull-out ends were forced to rely on folding the removable disc over (onto itself) so that the residual metal along the remainder of the peripheral scoreline could be "torn," as the opener was pulled backwardly-diametrically across the center of the end wall after the initial rupture.
In general, most such full-panel easy-open ends have used "lanced" openers in which the handle end of the opener was free to be lifted away from the panel while a riveted portion of the opener remained coplanar with the panel as riveted. However, when a "vent scoreline" was used in certain prior "disc pull-out" end closures, a longitudinally-rigid (lance-free) opener was used to rupture the vent portion of the back scoreline and provide for movement of the ring-pull opener from a radially-recessed position which was required for chuck tooling access for chime seam formation.
REFERENCES:
patent: Re30349 (1980-07-01), Silver
patent: 3527378 (1970-09-01), Scharf et al.
patent: 3544025 (1970-12-01), La Croce et al.
patent: 3696961 (1972-10-01), Holk, Jr.
patent: 3939787 (1976-02-01), Morrison et al.
patent: 4052949 (1977-10-01), Woodley
patent: 4386713 (1983-06-01), Baumeyer et al.
patent: 4804106 (1989-02-01), Saunders
patent: 4848623 (1989-07-01), Saunders et al.
Baker Raymond N.
Marcus Stephen
Stucker Nova
Weirton Steel Corporation
LandOfFree
Abuse resistant, safety-edge, controlled-opening convenience-fea does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Abuse resistant, safety-edge, controlled-opening convenience-fea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abuse resistant, safety-edge, controlled-opening convenience-fea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1522019