CA1317241C - Abuse resistant, safety-edge, controlled-opening convenience-feature endclosures - Google Patents
Abuse resistant, safety-edge, controlled-opening convenience-feature endclosuresInfo
- Publication number
- CA1317241C CA1317241C CA000578752A CA578752A CA1317241C CA 1317241 C CA1317241 C CA 1317241C CA 000578752 A CA000578752 A CA 000578752A CA 578752 A CA578752 A CA 578752A CA 1317241 C CA1317241 C CA 1317241C
- Authority
- CA
- Canada
- Prior art keywords
- sheet metal
- scoreline
- end wall
- wall panel
- opener
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
- B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
- B65D2517/0001—Details
- B65D2517/0058—Other details of container end panel
- B65D2517/0074—Local recess in container end panel
- B65D2517/0079—Local recess in container end panel located beneath tab hand grip to facilitate initial lifting
Abstract
ABSTRACT OF THE DISCLOSURE
A convenience-feature full-open end closure structure (27) with a shock-absorbing bead (45) located between a peripheral scoreline (34) which defines the end wall disc (31) to be removed from a recessed end wall panel (49). An arch-shaped back scoreline means with central vent portion (36) and legs (37, 38) is located within the removable disc (31) and co-acts with a longitudinally rigid (non-lanced) opener (30) which is made integral by a rivet (32) formed from sheet metal of disc (31). A multi-layer sheet metal fold (40) shields the raw edge of ruptured residual peripheral scoreline metal which remains with disc (31); and a multi-layer sheet metal fold (42) shields residual raw-edge metal remaining with container (94). The back scoreline central portion (36) is contiguous to and radially inward of rivet (32) and the pair of legs (37, 38) extend with a radially-directed component on opposite sides of the rivet toward the adjacent portion of the peripheral chime seam (92). Such legs (37, 38) intersect multi-layer fold (40) forming a chord (88, 90) of preselec-ted length about which such opener (30) rotates to provide continued lever action severance of such peripheral scoreline (34).
A convenience-feature full-open end closure structure (27) with a shock-absorbing bead (45) located between a peripheral scoreline (34) which defines the end wall disc (31) to be removed from a recessed end wall panel (49). An arch-shaped back scoreline means with central vent portion (36) and legs (37, 38) is located within the removable disc (31) and co-acts with a longitudinally rigid (non-lanced) opener (30) which is made integral by a rivet (32) formed from sheet metal of disc (31). A multi-layer sheet metal fold (40) shields the raw edge of ruptured residual peripheral scoreline metal which remains with disc (31); and a multi-layer sheet metal fold (42) shields residual raw-edge metal remaining with container (94). The back scoreline central portion (36) is contiguous to and radially inward of rivet (32) and the pair of legs (37, 38) extend with a radially-directed component on opposite sides of the rivet toward the adjacent portion of the peripheral chime seam (92). Such legs (37, 38) intersect multi-layer fold (40) forming a chord (88, 90) of preselec-ted length about which such opener (30) rotates to provide continued lever action severance of such peripheral scoreline (34).
Description
13~72~1 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.
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.
According to one aspect of the present invention there is provided a sheet metal end-closure structure for a container comprising an end wall panel circumscribed by unitary chime seam metal for forming a chime seam by which the end-closure structure is attached to a container body and having a continuous peripheral scoreline defining a severable portion whose removal provides an opening in the endwall panel to facilitate full removal of the contents of the container. The severable portion is provided with an elongate integral opener. The endwall panel having shielding means located outboard of and contiguous to the peripheral scoreline for shielding residual metal at the torn peripheral scoreline remaining with the container. The shield means has a stiffening effect on the endwall panel. A shock-absorbing bead or corrugation is disposed between a chuck wall and the shielding means for protecting the peripheral scoreline from blows or other impact forces applied to the chime seam, endwall structure or container body.
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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.
According to one aspect of the present invention there is provided a sheet metal end-closure structure for a container comprising an end wall panel circumscribed by unitary chime seam metal for forming a chime seam by which the end-closure structure is attached to a container body and having a continuous peripheral scoreline defining a severable portion whose removal provides an opening in the endwall panel to facilitate full removal of the contents of the container. The severable portion is provided with an elongate integral opener. The endwall panel having shielding means located outboard of and contiguous to the peripheral scoreline for shielding residual metal at the torn peripheral scoreline remaining with the container. The shield means has a stiffening effect on the endwall panel. A shock-absorbing bead or corrugation is disposed between a chuck wall and the shielding means for protecting the peripheral scoreline from blows or other impact forces applied to the chime seam, endwall structure or container body.
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2 13~7~
According to another aspect of the present invention there is provided a full-open, safety-edge, disc-removal, convenience-feature sheet metal end-closure structure. The structure includes an end wall panel circumscribed by unitary chime seam metal for attaching the end wall closure structure to a container having a conEiguration which is symmetrical about a central longitudinal axis of a container with the central longitudinal axis intersecting the end closure panel at its geometric center when the end closure is attached to the container. The en~ wall panel is recessed axially in relation to the chime seam metal toward the interior for such a container. A bead, which is "U" shaped in cross section in a plane which includes such central longitudinal axis has its closed end disposed axially inwardly toward the interior. A chuck wall is symetrically disposed in relation to the geometric center or one panel and extends in the axial direction from the chime seam metal towards the axially-recessed end wall panel with the outboard leg of the bead forming an extension of the chuck wall. A
peripheral scoreline is spaced inboard of the chuck wall and "U" shaped bead toward the geometric center of the end wall panel defining a removable end wall disc for providing an opening in the end closure structure to facilitate full removal of container contents. A
multi-layer sheet metal fold i5 located on the interior surface in relation to the container and circumscribes the removable end wall disc contiguous to the peripheral scoreline in a position to shield raw edge residual metal of peripheral scoreline upon rupture thereof. An elongate longitudinally-rigid opener is secured by a unitary rivet to the removable disc contiguous to and in substantially parallel relationship to such generally-planar configuration of the ~nd wall panel with the longitudinal a~is of the elongate opener being ;: r~
2a ~L~11 72a~
oriented toward the peripheral scoreline with the working end of the elon~ate opener contiguous to the peripheral scoreline. A multi-layer sheet metal fold is located outboard of and contiguous to the peripheral scoreline on the exterior surface of the end wall panel in relation to the container providing shielding for raw-edge residual scoreline metal remaining with the container and also providing a barrier to outboard-directed movement of the elon~ate opener, with such multi-layer sheet metal fold being located inboard of the shock-absorbing bead so as to direct the working end of the opener toward the recessed panel and the peripheral scoreline to initiate rupture of a minor portion of the peripheral scoreline by Class I lever action. An arch-shaped back scoreline means has a central portion partially circumscribing and located inboard of the rivet toward the geometric center of the end wall panel with a leg extending from the central portion on each side of the rivet, each such leg having a major directional component toward the adjacent portion of the inner shielding multi-layer sheet metal fold to form a chord of preselectPd length between intersections with the multi-la~er sheet metal fold on the end wall disc. The central portion of the back scoreline means is ruptured by Class II lever action upon initial movement, about such unitary rivet as a fulcrum, of the handle end o~ the opener with the handle end moving in a direction away from the end wall panel in an arcuate path extending externally of the container causing rupture along the bac~ scoreline legs with the intersections with the fold forming a fulcrum axis for continued arcuate direction movement of the elongate opener to bring about contact of the opener with the chime seam metal which acts as a fulcrum for continued Class I lever action opening which moves at least a portion of the removable disc in an axial direction ,.,~, ~3~72~
externally away ~rom the container to continue rupture of the peripherally located scoreline.
According to yet another aspect of the present invention there is provided a method for fa~ricating an abuse-resistant, full-panel, convenience feature end closure structure for a cylindrical sidewall configuration container from flat-rolled sheet metal so as to provide shielding for residual raw edge metal remaining after severing a circular-configuration peripheral scoreline defining such full-panel opening for the container. A method includes the steps of forming chime seam metal around the periphery of a substantially-planar flat-rolled sheet metal blank for attaching the end structure to a cylindrical sidewall container, and countersinking an end wall panel in the sheet metal blank radially inward of the chime seam metal and disposed axially toward the interior of the container from the chime seam metal with the countersinking step defining a substantially cylindrical-configuration chuck wall contiguous to and extending from the chime seam metal in the axial direction toward the interior of the container, a peripheral rim of sheet metal contiguous to the chuck wall and in substantially parallel relationship with the countersunk end wall panel, and an intermediate configuration which is stepped in radial cross section in extending between the peripheral rim and the countersunk end wall panel. The stepped configuration includes a plurality of unitary sheet metal portions in angled relationship to each other with a compound curvilinear transition zone located at the peripheral rim, between each pair of angled sheet metal portions, and at the end wall panel. A bead is ~ormed which is ~'U" shaped in cross section in the peripheral rim, with the closed end of the "U" shaped b~ad being disposed toward the interior of the container~ An orientation is 2c ~3~72~1 established which is substantially perpendicularly transverse to the container central axis for a sheet metal portion located intermediate other angled sheet metal portions of the stepped configuration between the "U" shaped bead and the countersunk end wall panel. The intermediate sheet metal portion is established for locating a circular-configuration scoreline therein on its exterior surface for defining the periphery of a disc to be removed from the end closure structure, with the remaining angled sheet metal portions being located radially inboard and outboard of the intermediate sheet metal portion. Angled sheet metal portions located radially on each side of the intermediate sheet metal portion are oriented so as to be in acute-angled, overlaying, pre-folded relationship to each other to provide for a pair of multi-layer folds of sheet metal with the pre-folding orientation of such multi-la~er folds of sheet metal being carried out to locate one each of the pair on opposite sides radially of the predetermined location for such circular-configuration peripheral scoreline to be located on such intermediate sheet metal portion and to locate one each of s~lch pair ; on opposite surfaces of such end wall panel so as to allow access for a scoring tool on one surface and access for a backing-support tool for such scoring on the remaining surface of the intermediate sheet metal portion. A rivet butkon is pre-formed for use in securing an opener to the end wall panel during the pre-foldin~ orientation of the multi-layer folds of 3Q sheet metal. The circular-configuration peripheral scoreline is formed to substantially uniform depth in the intermediate sheet metal portion while providing access between the multi-layer sheet metal folds as pre-folded for a scoring tool on such exterior surface and for backing the support tool on the interior surface of such end wall panel. An arch-shaped back scoreline ~ 3 ~ 7 ~
means is formed having a central portion at least partially circumscribing the rivet button radially inwardly thereof, and a leg extends from the central portion on each side of the rivet button in the direction of an adjacent portion of the chime seam with the effective included angle between the direction of the legs being an acute angle. The method then includes the step of completing disposition of the angularly pre-folded sheet metal portions in relation to the peripheral scoreline such that one each of the compound curvilinear transition zones define a circular configuration in plan view which is contiguous on its respective surface of the end wall panel to the circular configuration peripheral scoreline.
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 Pnd 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 ~3~72~
oE an integral opener as taught by the lnvention;
FIGSo 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 stags, F~G. 8 shows initial configuration ~ormation o~ a shallow depth rivet button and a peripheral shock-absorbing bead, PIG~ 9 shows eurther ~orming o~ the rivet button and initiation of pre-~olding o~ an inner multi-layer sheet metal ~old eor shielding residual torn metal remaining w.ith a removable panel portion, FIG. 10 shows scoring of the end wall panel and initiation o pre-folding of an out-r multi-layer sheet metal old for shielding residual torn metal remaining witll the container, FIG. 11 shows~ com~letion of such multi-layer sheet metal folds and Eorming pro~iling in a panel portion, and FIG. 12 shows completing ~ormation of the rivet securing an opener to the end wall panel; and -- ~ FIGS. 13 throu~h 17 are perspective views oE the __ ~
end closure embodiment of FIG. 1 and a portion Oe a container for descri`~ing the opening procedure taught by the present invention.
In any of the known prior art "disc pull-out"
~3~72l~, ends, only a minor portion of the peripheral scoreline was ruptured by lever action. Such rupturing took place initially when the opener was lifted. There-after, the remainder of the peripheral scoreline was separated by pulling backwardly on the ring-pull oE
the opener. In general, such previously available disc pull-out ends were Eorced 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 ~ull-pane1 easy-open ends have used "lanced" openers in which the handle end of the opener was Eree to be lifted away Erom the panel while a riveted portion of the opener remained coplanar with the panel as riveted. However, when a "vent scoreline" was use~ in certain prior "disc pull-out" end closures, a lon~itudinally-rigid (Lance-frae) 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.
Features of the present invention maintain the removable disc substantially planar and rigid through-~L3~72~
out the opening procedure Eor the container. ~lso, the substantially rigid end wall panel provided contributes to the continuing lever-action opening features made available by the invention. And, an accurate interrelated positioning of parts ~acilitates ease o~f initial rupture of the high-strength abuse-resistant ends provided.
In the circular-configuration embodiment o~ FIGS.
1-5, end closure structure 27, shown in plan view o~
its exterior (public side) in FIG. 1, and in plan view of its interior (content side) in FIG. 2, is ~ormed with chime seam metal 2~ around its circular periphe-ry. A longitudinally-rigid (non-lanced) opener 30 (FIG. 1) is secured to removable disc 31 ~y rivet 32.
The working end 33 of the elongated integral opener 30 is positioned in contiguous relationship to a portion o~ peripheral scoreline 34; the latter, as shown and generally preEerable, has a circular configuration in plan view and de~ines the removahle disc 31 portion of the recessed end wall panel o~ closure structure 27.
The cross section views o~ FrGS. 3 and ~ are taken along the ull diameter of FIG. l; FIG. 5 is an enlarged cross sectional view o~ a portion o~ FIG. 3 diametrically opposite to the location o~ the working 25end 33 of opener 30.~ PeripheraL scoreline 3~ is : spaced radially inwardly from chuck wall 35 toward the .
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13~1 ~2~
central longitudinal axis for a container shown in later figures; such axis passes through the geometric center of the removable disc 31 and end closure struckure 27.
A curvilinear vent scorelina portion 36 (FIG. 2) of the back scoreline means partially circumscribes rivet 32. Such back scoreline means continues along legs 37, 38; with one each extending on opposite sides of the rivet with each having a major component of direction which is radialO As taught herein, the back scoreline means is arch-shaped in configuration as shown in the embodiment of FIG. 2 and later figures; the arch-shape provides an added safety feature improvement over the moustache shaped back scoreline configuration previously provided and described in Canadian Patent Application Serial No. 578,885, filed September 29, 1988.
In a preferred embodiment of the present invention, a multi-layer fold of sheet metal i5 positioned on each cross-sectional side of peripheral scoreline 34 (FIG.
5). Each such multi-layer sheet-metal fold acts to shield the raw edge residual metal remaining after severing along a peripheral scoraline. A triple-layer fold of sheet metal, as described in more detail later herein, is adequate and is preferred to accomplish such purposes.
- r ~
~7~
Tripl~-layer metal fold 40 (FIG. ~) remains with the severable portion 31 ~disc shaped in ~he embodi-~ment o~ FIGS. 1-5) upon and aeter severing along a paripheral scoreline 34. Triple-layer fold 4~, wh.ich is positioned outwardly of the scoreline 34, and in accordance with a preferred embodiment of the inven-tion on the extarior sur~ace (public side) o~ the end closure structure 27, remains with that portion of the end closure structure remaining wi~ the container upon and a~ter severing o~ scoreline 3~.
The configuration and pLacement o~ the arch-shaped back score.~ine means (as seen in ~I~. 2 and later figures), along wit~ othe~ ~arts o~ the end closure structure, pla~f important roles in the interaction of UnitAry and integral portions ~hich facilitate ease o~ opening. Tearing along leg portions 37, 38 of the back scoreLine means, after rupture o~
the curvilinear vent portion 36 would ordinarily cause lance-free opener 30 to move out~ardly ~ith a radially directed component o~ movement in the circular embodiment o~ FIGS. 1-5). Part oE the invention teaches positioning a Eormed, unitary portion of end ~all ~etal to accurately contr~ol (by stopping~ such movement o~ the opener and to direct the opening force o~ its working end 33 toward a location, ~ithin p~escrlbed limits, whlch facilitates 13~72~
initial rupture o the peripheral scoreline 34.
Positioning of the rounded-edge transition zone 44 of multi-layer fold 42 (FIG. 6 enlargement controls any movement of the opener 30 and directs the opening Eorce of its working end 33 toward the peripheral scoreline 34.
The rounded transition zone metal 43 o~ the ~ulti-layer ~old 40 is positioned oppositely but contiguous to the location of the peripheral scoreline 34. In a circular embo~i~ent, rounded transi~ion zone metal 43 has a predetermined diameter (~easured in the plane of the end wall) ~hich approximates, but is le~ss than, the diameter of the rounded-edge transition zone : metal 44~ of multi-layer sheet-metal fold ~2. The apex :l5 of scoreline 34 (at ~which rupture occurs) can also approximate, but is less than the circumference of ; transition zone metal 14. These teachings avoid attempting to remove an end wall disc ha~ing a greater circumference than that of the ~etal at zone 44.
Rounded metal 43 is positioned to shield the raw-edge residual metal re~aining with disc 31 b~ at least partially obstructing access of such torn ed~e metal.
The torn portion Oe the peripheral scoreline 34 (at the apex o~ thë ;'V" snaped radial cross-sectional ~ 25 configuration::of the scoreline) has a diameter which : can be appro.Yimately equal to that of rounded edge -13~72~1 metal 43 of the transition zone Eor multi-layer ~old 40 but, as pointed out immediately above, must be less than that o~ rounded edge metal 44 Oe the outer barrler-means multi-layer sheet metal fold 43;
otherwise, edge 44 would block removal of a disc which presented metal Oe larger diameter.
There is a range ~or application of an Initial rupturing force which, to facilitate ease of opening, particularly in opening a steel end closure, is measured in thousandtlls o~ an inch for typical consumer-size cans, such as a three-inch liameter can.
This ranqe takes into account an arcuate path movement for the working end of the opener and, the "v" shaped conf~iguration, in cros~s section, o~ the peripheral :
scoreline. Controlling movement o~ the int~egral opener so as to guide its working end 33 to contact the end wall panel witllin an acceptable range, as taught herein, is carried out by positioning the multi-layer fold 42 so as to act as a barrier in which edge 44 stops radial movement o~ opener 30 and dir~ct its working end 33 inwardly (in relation to a con-~` tainer) toward such peripheral scoreline 3~ in the recessed end w~all panel.
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The scoreline ~34 has a diameter (where rup~ture occurs) which approximates or is sli~htly ~reater than ~ that of the transition zone metal 43 of multi-Iayer :
, '13~12~
folds 40. The open end of "V" shaped (in cross section) scoreline 34 is between about five and about ten thousandths of an inch in radial dimension. For example, scorin~ .006" deep with a scoring tool having a 50 included angle results in the open end of the "V" having a radial dimension of .0056"; and, scoring .009" deep with a scoring tool havin~ a 60D included angle results in an open end having a radial dimension of .0104". The working end of the opener is turned inwardly toward the recessed end wall pan~l by preventing radial movement o~ such working tip of the opener in the plane o~, or parallel to the plane oE, the end wall panel. The location o~ the barrier .
means, multi-layer ~old 42 is se.~ected to take into account the angled move~ent o~ the working end 33 toward scoreline 34.
ay stopping the horizontal ~radial) component o~
movement, the lever-action opening force is thus directed vertically downwardly toward the scoreline 34. In accordance with present teachings, the radial distance between rounded edge 43 (approximatelv the same location as center of scoreline 34) and the barrier location o.f rounded edge 44 can be in a ran~e between about eive and about twenty thousandths of an : 25 inch Eor an end wall closure structure Eor a three (300) to a three and seven-sixteenths (307) inch 13~72~
diameter container in which the end wall comprises flat rolled steel of about .008" to .010" nominal thickness gage. By preventing radial movement of the opener beyond such range, its working end will be turned, ~oward the end wall pansl into, or sufficient-ly adjacent to, the open end of the peripheral score-line to facilitate ease of opening.
Positioning the barrier-means edge metal 44 beyond the earlier designated range (closer to shock-1~ absorbing bead 45 which i.s contiguous to chuck wall35, FIG. 5) will diminish the ease o~ opening, if not make opening substantially impossihle eor a consu~er of average strength.
Along ~tith such interrelated positionln~J of parts, the new combination of steps tau~ht provides in combination abuse resistance, controlled ~nove~ent of the opener and shielding o~ raw edge metal features while still providing access and timing, during sequential fabrication stsps, ~or eeeicient and efEective peripheral scoreljne and rivet button formation.
In FIG. 7, the sheet metal is blanked and an end panel 49, inboard of chuck wall 35, lS countersunk in relation to chime metal ~. A peripheral rim 50 is for~.ed contiguous to chuck wall 35 ~or subsequent e~r~ation of sb~c~-abso~ber bea1 45 (as sllown in FIG.
, IL f3 1. 7 2 ~
5, the outboard leg oE such "U" shaped bead is an extension of chuclc wall 35). From rim 50 a series of sheet metal portions, riser 51, step 52 and riser 53, extand in stepped fashion to recessed panel 49 which has an extended-planar-surface area.
Such riser and step sheet metal portions are joined by transition zones 54, 55, 56 which are of compound-curvature in a circular configuration embodiment with each being curvilinear in radlal cross section and also around its respective circumference in a plane which is perpendicularly transverse to the central longitudinal axis ~or a container to which the end closure structure is at~ached. Such steps and risers, along with the transition zones participate in formation of the double ~ulti-layer sheet ~etal Eol~s 40, 42 ormed during the sequences of FIGS. ~-12. ~im 50 l~ads through zone 54 to riser Sl, which leads through zone 55 to step 52. The latter lead.s through zone 56 to riser 53 which leads through zone 57 ~o portion 58 of the recessed end wall panel.
In carryin~ out the procedures of FIG5. 8-12, the timing of the shock-absorbing bead formation, rivet-button formation, the multi-layer folding action, and the extent to which multl-layer sheet ~etal pre-Eold-ing is carried out prior to ~ormation oE the periph-eral scoreline 34, are important considerations along , .
~3~72~
~ith the timing o end wall pro~iling ~ormation in relation to securing an integral opener.
The peripheral scoreline 34 ~or the removable disc 31 is to be disposed in the end wall panel 49 intermediate the pair o~ multi-layer folds (FIGS. 5, 6) each of which separately shield residual scoreline ~etal on the separated disc and on the container. The ~orming sequence procedure taught enables tooling access, between the ~ulti-layer pre-folds on each surface of the end closure, to enable scoring of a ; single thickness o~ sheet ~etal while th~ latter is supported on the remaining sur~ace opposi~e to tha scoring tool. The ~orminy o~ the shock absorbing bead, pre-folding o~ the sheet metal layers and preforming tl1e rivet hutton prior to scoring, enables completing the ~o~ding action, around such periphery, with minimized move~ant oE sheet matal ~olds being required after such scoring so as to sub.stantially pr~clude premature damage to residual scoreline met~l.
In the operation o FIG. 8, an initial rivet button configuration 60, ha-~ing a broad-diameter shallow-dome shape in cross section, is ormed. ~lso, the sheet metal o~peripheral rim 50 is pre formed into shock-absorber bead 45. St.~p portion 52 is oriented horizontally as shown. Perlpheral scorin~
(34) will subsequent~ly take place on such horizontally :
' ~3~2~1 oriented metal portion 52 of the end wall panel 49.
Such horizontally-orient~d metal portion 52 is to be - located so as to interconnect the pair of multi-layer folds 40, 42.
Shock-absorbing bead ~ormation, the stages of multi-lay.3r ~olding o~ the sheet metal, scoreline formation, the stages o~ rivet button formation, pro~iling, riveting an opener to the removable panel port.ion, and embossing opening instructions are coordinatsd while optimizing the number of sequential steps. In addition to the above enumerated advantages o~ scorin~ a single Layer ol m~tal and avoiding premature damage to residual scorelinc metal, the rivet button formation and riveting actions are lS carried out without inter~ering ~lit!- the metal 'olding or scoring operations. Embossin~ openin~ instructions can be carried out simultaneous1~f ~ith ~ormation of the rivet button and the pro~iling including recessed einger access, as described later herQill.
2~ The shock-absorbing bead (45) as initially pre-formed (FIG. 8) is loosely de~ined. ~lso, start o~
the move~ent o~ metal, including transitiQn zone 54 and a portion o~ riser 51, which will comprise a part o~ the outer multi-layer ~old, is taking place.
In FIG. ~, a smaller-diameter, greater-depth rivet button 62 is formed an-l the pre-~o1ding Q~ metal I 31 72~
portions ~or the inner multi-layer ~old (40), that is riser portion 53 and a portion 58 of the end wall panel 49 contiguous to transition zone metal 57, are initiated.
In F~G. 10, the sheet m0tal portion 54 o~ FIG. 9, along ,with a portion of riser 51 are ~oved so as to partially ~or~ the outboard multi-layer sheet metal fold (42) while leaving access for scoring tool 64 to ~orm peripheral scoreline 34 in ~he ex~erior (public) surface ~o~ the end wall panel ~9 (thus de~ining the removable portion 31): while on the interior (content) sur~ace of the end closure baclc-up tool 65 has access pa~st the inboard multi-layer fold (40) whlch is being formed.
In FIG. 11, the peripherally-locatad shock-.
absorbing bead 45 is better dafined in a portion o~
peripheral rim 50 by tool 66; and the outboard multi-layer fold is bettar shaped by tool 67 which tool .
helps to deine the location o~ the radially-inwardly oriented transition zone metal (44 o~ ~IG. 6). Tool 68 also helps to locate such transition zone 44 while tool 70 helps to position transition zone 43 (of fold 40 in~FIG. G)~ as the~multl-~layer ~olds are being formed in ~inal orientation. The shape of the rivet button 62~is~held by the tooling shown; and end wall panel p~ g is be:ng carrled out.
-, ~3~72~1 In FIG. 12, while maintaining the shock-absorbing bead 45 and protecting sheet metal folds 40, 4~, the rivet button of FIG. ll, after receiving opener 3n ~ is ~ormed into rivet 32.
The registration and stacking protrusions 70, 72 (FIG.~l) are ~ormed in the initial blantcing stage.
The profile risers 76, 78 and fin~er indentation 80, to improve finger access beneath handle end 82 of opener 30, are formed in a subsequen~ sequence, prior to placement o~ the opener 30 for riveting, along with embossing o~ opening instructions ~4.
Pro~ile risers 76, 78 serve the uncti.on o holding the non-lanced opeller 30 substantially parallel to the generally planar conEi~uration o~ the end wall pane.l 49 for riveting. Such risers and the Eingsr indentation ~0 are Eorlned in the centra11y located recessed pro~iLe 74 o~ the end wall panel ~9.
~ ack scoreline formation pre~rably takcs place during formation o~ peripheral scoreline 34. The arcll-shaped baclc scoreline configuration of FIG. ~
which provides a chord o~ about ~.05" len~th h~twcen legs 37, 38 is preferred. This pre-s~lected chord length and the arch-shape segment dsfined by the back : scoreline prevents any raw edge portion Oe the .segment froln extending over the side o~ the chime seam, thus preventing a hazard to saE~tyO The pre-selected half-... . .
~3~7~
inch chord length is also the approximate width of opener 30 at that location.
.~s referred to brie~ly earlier, upon initial lifting of the handle end o~ opener 30 (FIG. 13) in an arcuate direction extarnally away from tlle end closure, the vent portion 36 of tlle back scoreline ruptures relying on Class II lever action. I~ith continuing arcuate movement, the back scoreline ~egs 37, 38 rupture toward the adjacent in~ner multi-layer sheet metal fold 40. The opener 30, with an endwall portion partially deEined by the back score-line, pivots about the chord deined by the intersec-tion's back scoreiine legs 37, 3~ at l3~ and 90 (FIG.
15).
The arcuate direction Inovem-3nt o the handle ~nd of the opener 30 is continue~ in ths same iirectio~n with the opener initially contactin~ (FIG. l-~.) chims 92 (formed from chime metal 2i3 and sidewall metal of container 94) which then acts as the ~ulcrum Eor Class I lever action opening, as the opener is swung o~er the 5ide o~ container 94 (FIG. 15).
.~s indicated~ by FIG. lo, this "over the side"
arcuate movement ~continues rupture oE a sl~niElcant rnajor portion of peripheral scoreline 34 ;7y Class l lever action a~out chime 92 as Eulcrum. It shoul~ be note~ in ~relat~on to FIG. 16, that none of the .
.
131 ~ 2 l~ ~
segments of the disc defined by the arch-shaped scoreline extends over the side of the container, as occurred with corner portions o~ such segment when formed from a moustache-shaped scoreline as previously provided. This arch-shaped scoreline has a prese-lected chord length as shown (between 88, 90) which is no greater than the widtll o~ the opener a~ such location overlying such chord; such preselected chord leng~h (about 0.50") can be maintained for difEering sized containers~
After such peripheral scoreline rupture, the removable disc is Lifted ~rom container 9~ as shown in ~ ~ FIG. 17.
In a typicaL end closure structure ~or a three 15 and 7/16 inch diamet~r ~307) can bod~ side wall ~ade ~rom flat rolled steel (75 '~/66, about .008" nominal thickness gage) ~etal plated and coatcd with a standard or~anic coatiny, the followiny data are representative:
~3~72~
Item Diameter Chime metal 28 (C.L.) 3.50"
; Chuck Wall 35 3.25"
: Bead 45 (~.L.) 3.22"
Transition zone 44 (ref.) 3.078"
Scoreline 34 (C.L.) 3.068"
~: Transition zone 43 (ref.) 3.064"
Rivet 32 (C.L.) 2.443 Other representative dimensions:
Item Dimensions Bead 45 (depth) .035"
(~idth) .050"
Chime metal 28 : (Cent*r Heigtlt above bottom of bead ~5) .150"
Rivet 32 ~ -(head diameter) .250"
(body diameter) .l~6"
Chord length (between legs 37, 38 at : : intersections 88, 90) 0.50"
Profiling panel 74 (dia~eter) ~.
Axial dimension between center of chime seam metal 2~ and panel ~9 ~ (FIG. 7) : ~ Typical thicknesses for flat rolled aluminum ond closures would be'.00g" to .012"~with residual metal thickness For ~scored severin~ .lines of about .004" to ; .005"-;:
.
, ' ' : , -1 3 ~
While specific values, materials, and configura-tions have been shown for purposes Oe speci~ically ; describing an embodiment of the invention, other values will be available in the light Oe the above teachings; therefore, for purposes o~ d~termining the scope of the presen~ invention reference should be made to the appended claims.
According to another aspect of the present invention there is provided a full-open, safety-edge, disc-removal, convenience-feature sheet metal end-closure structure. The structure includes an end wall panel circumscribed by unitary chime seam metal for attaching the end wall closure structure to a container having a conEiguration which is symmetrical about a central longitudinal axis of a container with the central longitudinal axis intersecting the end closure panel at its geometric center when the end closure is attached to the container. The en~ wall panel is recessed axially in relation to the chime seam metal toward the interior for such a container. A bead, which is "U" shaped in cross section in a plane which includes such central longitudinal axis has its closed end disposed axially inwardly toward the interior. A chuck wall is symetrically disposed in relation to the geometric center or one panel and extends in the axial direction from the chime seam metal towards the axially-recessed end wall panel with the outboard leg of the bead forming an extension of the chuck wall. A
peripheral scoreline is spaced inboard of the chuck wall and "U" shaped bead toward the geometric center of the end wall panel defining a removable end wall disc for providing an opening in the end closure structure to facilitate full removal of container contents. A
multi-layer sheet metal fold i5 located on the interior surface in relation to the container and circumscribes the removable end wall disc contiguous to the peripheral scoreline in a position to shield raw edge residual metal of peripheral scoreline upon rupture thereof. An elongate longitudinally-rigid opener is secured by a unitary rivet to the removable disc contiguous to and in substantially parallel relationship to such generally-planar configuration of the ~nd wall panel with the longitudinal a~is of the elongate opener being ;: r~
2a ~L~11 72a~
oriented toward the peripheral scoreline with the working end of the elon~ate opener contiguous to the peripheral scoreline. A multi-layer sheet metal fold is located outboard of and contiguous to the peripheral scoreline on the exterior surface of the end wall panel in relation to the container providing shielding for raw-edge residual scoreline metal remaining with the container and also providing a barrier to outboard-directed movement of the elon~ate opener, with such multi-layer sheet metal fold being located inboard of the shock-absorbing bead so as to direct the working end of the opener toward the recessed panel and the peripheral scoreline to initiate rupture of a minor portion of the peripheral scoreline by Class I lever action. An arch-shaped back scoreline means has a central portion partially circumscribing and located inboard of the rivet toward the geometric center of the end wall panel with a leg extending from the central portion on each side of the rivet, each such leg having a major directional component toward the adjacent portion of the inner shielding multi-layer sheet metal fold to form a chord of preselectPd length between intersections with the multi-la~er sheet metal fold on the end wall disc. The central portion of the back scoreline means is ruptured by Class II lever action upon initial movement, about such unitary rivet as a fulcrum, of the handle end o~ the opener with the handle end moving in a direction away from the end wall panel in an arcuate path extending externally of the container causing rupture along the bac~ scoreline legs with the intersections with the fold forming a fulcrum axis for continued arcuate direction movement of the elongate opener to bring about contact of the opener with the chime seam metal which acts as a fulcrum for continued Class I lever action opening which moves at least a portion of the removable disc in an axial direction ,.,~, ~3~72~
externally away ~rom the container to continue rupture of the peripherally located scoreline.
According to yet another aspect of the present invention there is provided a method for fa~ricating an abuse-resistant, full-panel, convenience feature end closure structure for a cylindrical sidewall configuration container from flat-rolled sheet metal so as to provide shielding for residual raw edge metal remaining after severing a circular-configuration peripheral scoreline defining such full-panel opening for the container. A method includes the steps of forming chime seam metal around the periphery of a substantially-planar flat-rolled sheet metal blank for attaching the end structure to a cylindrical sidewall container, and countersinking an end wall panel in the sheet metal blank radially inward of the chime seam metal and disposed axially toward the interior of the container from the chime seam metal with the countersinking step defining a substantially cylindrical-configuration chuck wall contiguous to and extending from the chime seam metal in the axial direction toward the interior of the container, a peripheral rim of sheet metal contiguous to the chuck wall and in substantially parallel relationship with the countersunk end wall panel, and an intermediate configuration which is stepped in radial cross section in extending between the peripheral rim and the countersunk end wall panel. The stepped configuration includes a plurality of unitary sheet metal portions in angled relationship to each other with a compound curvilinear transition zone located at the peripheral rim, between each pair of angled sheet metal portions, and at the end wall panel. A bead is ~ormed which is ~'U" shaped in cross section in the peripheral rim, with the closed end of the "U" shaped b~ad being disposed toward the interior of the container~ An orientation is 2c ~3~72~1 established which is substantially perpendicularly transverse to the container central axis for a sheet metal portion located intermediate other angled sheet metal portions of the stepped configuration between the "U" shaped bead and the countersunk end wall panel. The intermediate sheet metal portion is established for locating a circular-configuration scoreline therein on its exterior surface for defining the periphery of a disc to be removed from the end closure structure, with the remaining angled sheet metal portions being located radially inboard and outboard of the intermediate sheet metal portion. Angled sheet metal portions located radially on each side of the intermediate sheet metal portion are oriented so as to be in acute-angled, overlaying, pre-folded relationship to each other to provide for a pair of multi-layer folds of sheet metal with the pre-folding orientation of such multi-la~er folds of sheet metal being carried out to locate one each of the pair on opposite sides radially of the predetermined location for such circular-configuration peripheral scoreline to be located on such intermediate sheet metal portion and to locate one each of s~lch pair ; on opposite surfaces of such end wall panel so as to allow access for a scoring tool on one surface and access for a backing-support tool for such scoring on the remaining surface of the intermediate sheet metal portion. A rivet butkon is pre-formed for use in securing an opener to the end wall panel during the pre-foldin~ orientation of the multi-layer folds of 3Q sheet metal. The circular-configuration peripheral scoreline is formed to substantially uniform depth in the intermediate sheet metal portion while providing access between the multi-layer sheet metal folds as pre-folded for a scoring tool on such exterior surface and for backing the support tool on the interior surface of such end wall panel. An arch-shaped back scoreline ~ 3 ~ 7 ~
means is formed having a central portion at least partially circumscribing the rivet button radially inwardly thereof, and a leg extends from the central portion on each side of the rivet button in the direction of an adjacent portion of the chime seam with the effective included angle between the direction of the legs being an acute angle. The method then includes the step of completing disposition of the angularly pre-folded sheet metal portions in relation to the peripheral scoreline such that one each of the compound curvilinear transition zones define a circular configuration in plan view which is contiguous on its respective surface of the end wall panel to the circular configuration peripheral scoreline.
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 Pnd 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 ~3~72~
oE an integral opener as taught by the lnvention;
FIGSo 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 stags, F~G. 8 shows initial configuration ~ormation o~ a shallow depth rivet button and a peripheral shock-absorbing bead, PIG~ 9 shows eurther ~orming o~ the rivet button and initiation of pre-~olding o~ an inner multi-layer sheet metal ~old eor shielding residual torn metal remaining w.ith a removable panel portion, FIG. 10 shows scoring of the end wall panel and initiation o pre-folding of an out-r multi-layer sheet metal old for shielding residual torn metal remaining witll the container, FIG. 11 shows~ com~letion of such multi-layer sheet metal folds and Eorming pro~iling in a panel portion, and FIG. 12 shows completing ~ormation of the rivet securing an opener to the end wall panel; and -- ~ FIGS. 13 throu~h 17 are perspective views oE the __ ~
end closure embodiment of FIG. 1 and a portion Oe a container for descri`~ing the opening procedure taught by the present invention.
In any of the known prior art "disc pull-out"
~3~72l~, ends, only a minor portion of the peripheral scoreline was ruptured by lever action. Such rupturing took place initially when the opener was lifted. There-after, the remainder of the peripheral scoreline was separated by pulling backwardly on the ring-pull oE
the opener. In general, such previously available disc pull-out ends were Eorced 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 ~ull-pane1 easy-open ends have used "lanced" openers in which the handle end of the opener was Eree to be lifted away Erom the panel while a riveted portion of the opener remained coplanar with the panel as riveted. However, when a "vent scoreline" was use~ in certain prior "disc pull-out" end closures, a lon~itudinally-rigid (Lance-frae) 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.
Features of the present invention maintain the removable disc substantially planar and rigid through-~L3~72~
out the opening procedure Eor the container. ~lso, the substantially rigid end wall panel provided contributes to the continuing lever-action opening features made available by the invention. And, an accurate interrelated positioning of parts ~acilitates ease o~f initial rupture of the high-strength abuse-resistant ends provided.
In the circular-configuration embodiment o~ FIGS.
1-5, end closure structure 27, shown in plan view o~
its exterior (public side) in FIG. 1, and in plan view of its interior (content side) in FIG. 2, is ~ormed with chime seam metal 2~ around its circular periphe-ry. A longitudinally-rigid (non-lanced) opener 30 (FIG. 1) is secured to removable disc 31 ~y rivet 32.
The working end 33 of the elongated integral opener 30 is positioned in contiguous relationship to a portion o~ peripheral scoreline 34; the latter, as shown and generally preEerable, has a circular configuration in plan view and de~ines the removahle disc 31 portion of the recessed end wall panel o~ closure structure 27.
The cross section views o~ FrGS. 3 and ~ are taken along the ull diameter of FIG. l; FIG. 5 is an enlarged cross sectional view o~ a portion o~ FIG. 3 diametrically opposite to the location o~ the working 25end 33 of opener 30.~ PeripheraL scoreline 3~ is : spaced radially inwardly from chuck wall 35 toward the .
.
13~1 ~2~
central longitudinal axis for a container shown in later figures; such axis passes through the geometric center of the removable disc 31 and end closure struckure 27.
A curvilinear vent scorelina portion 36 (FIG. 2) of the back scoreline means partially circumscribes rivet 32. Such back scoreline means continues along legs 37, 38; with one each extending on opposite sides of the rivet with each having a major component of direction which is radialO As taught herein, the back scoreline means is arch-shaped in configuration as shown in the embodiment of FIG. 2 and later figures; the arch-shape provides an added safety feature improvement over the moustache shaped back scoreline configuration previously provided and described in Canadian Patent Application Serial No. 578,885, filed September 29, 1988.
In a preferred embodiment of the present invention, a multi-layer fold of sheet metal i5 positioned on each cross-sectional side of peripheral scoreline 34 (FIG.
5). Each such multi-layer sheet-metal fold acts to shield the raw edge residual metal remaining after severing along a peripheral scoraline. A triple-layer fold of sheet metal, as described in more detail later herein, is adequate and is preferred to accomplish such purposes.
- r ~
~7~
Tripl~-layer metal fold 40 (FIG. ~) remains with the severable portion 31 ~disc shaped in ~he embodi-~ment o~ FIGS. 1-5) upon and aeter severing along a paripheral scoreline 34. Triple-layer fold 4~, wh.ich is positioned outwardly of the scoreline 34, and in accordance with a preferred embodiment of the inven-tion on the extarior sur~ace (public side) o~ the end closure structure 27, remains with that portion of the end closure structure remaining wi~ the container upon and a~ter severing o~ scoreline 3~.
The configuration and pLacement o~ the arch-shaped back score.~ine means (as seen in ~I~. 2 and later figures), along wit~ othe~ ~arts o~ the end closure structure, pla~f important roles in the interaction of UnitAry and integral portions ~hich facilitate ease o~ opening. Tearing along leg portions 37, 38 of the back scoreLine means, after rupture o~
the curvilinear vent portion 36 would ordinarily cause lance-free opener 30 to move out~ardly ~ith a radially directed component o~ movement in the circular embodiment o~ FIGS. 1-5). Part oE the invention teaches positioning a Eormed, unitary portion of end ~all ~etal to accurately contr~ol (by stopping~ such movement o~ the opener and to direct the opening force o~ its working end 33 toward a location, ~ithin p~escrlbed limits, whlch facilitates 13~72~
initial rupture o the peripheral scoreline 34.
Positioning of the rounded-edge transition zone 44 of multi-layer fold 42 (FIG. 6 enlargement controls any movement of the opener 30 and directs the opening Eorce of its working end 33 toward the peripheral scoreline 34.
The rounded transition zone metal 43 o~ the ~ulti-layer ~old 40 is positioned oppositely but contiguous to the location of the peripheral scoreline 34. In a circular embo~i~ent, rounded transi~ion zone metal 43 has a predetermined diameter (~easured in the plane of the end wall) ~hich approximates, but is le~ss than, the diameter of the rounded-edge transition zone : metal 44~ of multi-layer sheet-metal fold ~2. The apex :l5 of scoreline 34 (at ~which rupture occurs) can also approximate, but is less than the circumference of ; transition zone metal 14. These teachings avoid attempting to remove an end wall disc ha~ing a greater circumference than that of the ~etal at zone 44.
Rounded metal 43 is positioned to shield the raw-edge residual metal re~aining with disc 31 b~ at least partially obstructing access of such torn ed~e metal.
The torn portion Oe the peripheral scoreline 34 (at the apex o~ thë ;'V" snaped radial cross-sectional ~ 25 configuration::of the scoreline) has a diameter which : can be appro.Yimately equal to that of rounded edge -13~72~1 metal 43 of the transition zone Eor multi-layer ~old 40 but, as pointed out immediately above, must be less than that o~ rounded edge metal 44 Oe the outer barrler-means multi-layer sheet metal fold 43;
otherwise, edge 44 would block removal of a disc which presented metal Oe larger diameter.
There is a range ~or application of an Initial rupturing force which, to facilitate ease of opening, particularly in opening a steel end closure, is measured in thousandtlls o~ an inch for typical consumer-size cans, such as a three-inch liameter can.
This ranqe takes into account an arcuate path movement for the working end of the opener and, the "v" shaped conf~iguration, in cros~s section, o~ the peripheral :
scoreline. Controlling movement o~ the int~egral opener so as to guide its working end 33 to contact the end wall panel witllin an acceptable range, as taught herein, is carried out by positioning the multi-layer fold 42 so as to act as a barrier in which edge 44 stops radial movement o~ opener 30 and dir~ct its working end 33 inwardly (in relation to a con-~` tainer) toward such peripheral scoreline 3~ in the recessed end w~all panel.
.
The scoreline ~34 has a diameter (where rup~ture occurs) which approximates or is sli~htly ~reater than ~ that of the transition zone metal 43 of multi-Iayer :
, '13~12~
folds 40. The open end of "V" shaped (in cross section) scoreline 34 is between about five and about ten thousandths of an inch in radial dimension. For example, scorin~ .006" deep with a scoring tool having a 50 included angle results in the open end of the "V" having a radial dimension of .0056"; and, scoring .009" deep with a scoring tool havin~ a 60D included angle results in an open end having a radial dimension of .0104". The working end of the opener is turned inwardly toward the recessed end wall pan~l by preventing radial movement o~ such working tip of the opener in the plane o~, or parallel to the plane oE, the end wall panel. The location o~ the barrier .
means, multi-layer ~old 42 is se.~ected to take into account the angled move~ent o~ the working end 33 toward scoreline 34.
ay stopping the horizontal ~radial) component o~
movement, the lever-action opening force is thus directed vertically downwardly toward the scoreline 34. In accordance with present teachings, the radial distance between rounded edge 43 (approximatelv the same location as center of scoreline 34) and the barrier location o.f rounded edge 44 can be in a ran~e between about eive and about twenty thousandths of an : 25 inch Eor an end wall closure structure Eor a three (300) to a three and seven-sixteenths (307) inch 13~72~
diameter container in which the end wall comprises flat rolled steel of about .008" to .010" nominal thickness gage. By preventing radial movement of the opener beyond such range, its working end will be turned, ~oward the end wall pansl into, or sufficient-ly adjacent to, the open end of the peripheral score-line to facilitate ease of opening.
Positioning the barrier-means edge metal 44 beyond the earlier designated range (closer to shock-1~ absorbing bead 45 which i.s contiguous to chuck wall35, FIG. 5) will diminish the ease o~ opening, if not make opening substantially impossihle eor a consu~er of average strength.
Along ~tith such interrelated positionln~J of parts, the new combination of steps tau~ht provides in combination abuse resistance, controlled ~nove~ent of the opener and shielding o~ raw edge metal features while still providing access and timing, during sequential fabrication stsps, ~or eeeicient and efEective peripheral scoreljne and rivet button formation.
In FIG. 7, the sheet metal is blanked and an end panel 49, inboard of chuck wall 35, lS countersunk in relation to chime metal ~. A peripheral rim 50 is for~.ed contiguous to chuck wall 35 ~or subsequent e~r~ation of sb~c~-abso~ber bea1 45 (as sllown in FIG.
, IL f3 1. 7 2 ~
5, the outboard leg oE such "U" shaped bead is an extension of chuclc wall 35). From rim 50 a series of sheet metal portions, riser 51, step 52 and riser 53, extand in stepped fashion to recessed panel 49 which has an extended-planar-surface area.
Such riser and step sheet metal portions are joined by transition zones 54, 55, 56 which are of compound-curvature in a circular configuration embodiment with each being curvilinear in radlal cross section and also around its respective circumference in a plane which is perpendicularly transverse to the central longitudinal axis ~or a container to which the end closure structure is at~ached. Such steps and risers, along with the transition zones participate in formation of the double ~ulti-layer sheet ~etal Eol~s 40, 42 ormed during the sequences of FIGS. ~-12. ~im 50 l~ads through zone 54 to riser Sl, which leads through zone 55 to step 52. The latter lead.s through zone 56 to riser 53 which leads through zone 57 ~o portion 58 of the recessed end wall panel.
In carryin~ out the procedures of FIG5. 8-12, the timing of the shock-absorbing bead formation, rivet-button formation, the multi-layer folding action, and the extent to which multl-layer sheet ~etal pre-Eold-ing is carried out prior to ~ormation oE the periph-eral scoreline 34, are important considerations along , .
~3~72~
~ith the timing o end wall pro~iling ~ormation in relation to securing an integral opener.
The peripheral scoreline 34 ~or the removable disc 31 is to be disposed in the end wall panel 49 intermediate the pair o~ multi-layer folds (FIGS. 5, 6) each of which separately shield residual scoreline ~etal on the separated disc and on the container. The ~orming sequence procedure taught enables tooling access, between the ~ulti-layer pre-folds on each surface of the end closure, to enable scoring of a ; single thickness o~ sheet ~etal while th~ latter is supported on the remaining sur~ace opposi~e to tha scoring tool. The ~orminy o~ the shock absorbing bead, pre-folding o~ the sheet metal layers and preforming tl1e rivet hutton prior to scoring, enables completing the ~o~ding action, around such periphery, with minimized move~ant oE sheet matal ~olds being required after such scoring so as to sub.stantially pr~clude premature damage to residual scoreline met~l.
In the operation o FIG. 8, an initial rivet button configuration 60, ha-~ing a broad-diameter shallow-dome shape in cross section, is ormed. ~lso, the sheet metal o~peripheral rim 50 is pre formed into shock-absorber bead 45. St.~p portion 52 is oriented horizontally as shown. Perlpheral scorin~
(34) will subsequent~ly take place on such horizontally :
' ~3~2~1 oriented metal portion 52 of the end wall panel 49.
Such horizontally-orient~d metal portion 52 is to be - located so as to interconnect the pair of multi-layer folds 40, 42.
Shock-absorbing bead ~ormation, the stages of multi-lay.3r ~olding o~ the sheet metal, scoreline formation, the stages o~ rivet button formation, pro~iling, riveting an opener to the removable panel port.ion, and embossing opening instructions are coordinatsd while optimizing the number of sequential steps. In addition to the above enumerated advantages o~ scorin~ a single Layer ol m~tal and avoiding premature damage to residual scorelinc metal, the rivet button formation and riveting actions are lS carried out without inter~ering ~lit!- the metal 'olding or scoring operations. Embossin~ openin~ instructions can be carried out simultaneous1~f ~ith ~ormation of the rivet button and the pro~iling including recessed einger access, as described later herQill.
2~ The shock-absorbing bead (45) as initially pre-formed (FIG. 8) is loosely de~ined. ~lso, start o~
the move~ent o~ metal, including transitiQn zone 54 and a portion o~ riser 51, which will comprise a part o~ the outer multi-layer ~old, is taking place.
In FIG. ~, a smaller-diameter, greater-depth rivet button 62 is formed an-l the pre-~o1ding Q~ metal I 31 72~
portions ~or the inner multi-layer ~old (40), that is riser portion 53 and a portion 58 of the end wall panel 49 contiguous to transition zone metal 57, are initiated.
In F~G. 10, the sheet m0tal portion 54 o~ FIG. 9, along ,with a portion of riser 51 are ~oved so as to partially ~or~ the outboard multi-layer sheet metal fold (42) while leaving access for scoring tool 64 to ~orm peripheral scoreline 34 in ~he ex~erior (public) surface ~o~ the end wall panel ~9 (thus de~ining the removable portion 31): while on the interior (content) sur~ace of the end closure baclc-up tool 65 has access pa~st the inboard multi-layer fold (40) whlch is being formed.
In FIG. 11, the peripherally-locatad shock-.
absorbing bead 45 is better dafined in a portion o~
peripheral rim 50 by tool 66; and the outboard multi-layer fold is bettar shaped by tool 67 which tool .
helps to deine the location o~ the radially-inwardly oriented transition zone metal (44 o~ ~IG. 6). Tool 68 also helps to locate such transition zone 44 while tool 70 helps to position transition zone 43 (of fold 40 in~FIG. G)~ as the~multl-~layer ~olds are being formed in ~inal orientation. The shape of the rivet button 62~is~held by the tooling shown; and end wall panel p~ g is be:ng carrled out.
-, ~3~72~1 In FIG. 12, while maintaining the shock-absorbing bead 45 and protecting sheet metal folds 40, 4~, the rivet button of FIG. ll, after receiving opener 3n ~ is ~ormed into rivet 32.
The registration and stacking protrusions 70, 72 (FIG.~l) are ~ormed in the initial blantcing stage.
The profile risers 76, 78 and fin~er indentation 80, to improve finger access beneath handle end 82 of opener 30, are formed in a subsequen~ sequence, prior to placement o~ the opener 30 for riveting, along with embossing o~ opening instructions ~4.
Pro~ile risers 76, 78 serve the uncti.on o holding the non-lanced opeller 30 substantially parallel to the generally planar conEi~uration o~ the end wall pane.l 49 for riveting. Such risers and the Eingsr indentation ~0 are Eorlned in the centra11y located recessed pro~iLe 74 o~ the end wall panel ~9.
~ ack scoreline formation pre~rably takcs place during formation o~ peripheral scoreline 34. The arcll-shaped baclc scoreline configuration of FIG. ~
which provides a chord o~ about ~.05" len~th h~twcen legs 37, 38 is preferred. This pre-s~lected chord length and the arch-shape segment dsfined by the back : scoreline prevents any raw edge portion Oe the .segment froln extending over the side o~ the chime seam, thus preventing a hazard to saE~tyO The pre-selected half-... . .
~3~7~
inch chord length is also the approximate width of opener 30 at that location.
.~s referred to brie~ly earlier, upon initial lifting of the handle end o~ opener 30 (FIG. 13) in an arcuate direction extarnally away from tlle end closure, the vent portion 36 of tlle back scoreline ruptures relying on Class II lever action. I~ith continuing arcuate movement, the back scoreline ~egs 37, 38 rupture toward the adjacent in~ner multi-layer sheet metal fold 40. The opener 30, with an endwall portion partially deEined by the back score-line, pivots about the chord deined by the intersec-tion's back scoreiine legs 37, 3~ at l3~ and 90 (FIG.
15).
The arcuate direction Inovem-3nt o the handle ~nd of the opener 30 is continue~ in ths same iirectio~n with the opener initially contactin~ (FIG. l-~.) chims 92 (formed from chime metal 2i3 and sidewall metal of container 94) which then acts as the ~ulcrum Eor Class I lever action opening, as the opener is swung o~er the 5ide o~ container 94 (FIG. 15).
.~s indicated~ by FIG. lo, this "over the side"
arcuate movement ~continues rupture oE a sl~niElcant rnajor portion of peripheral scoreline 34 ;7y Class l lever action a~out chime 92 as Eulcrum. It shoul~ be note~ in ~relat~on to FIG. 16, that none of the .
.
131 ~ 2 l~ ~
segments of the disc defined by the arch-shaped scoreline extends over the side of the container, as occurred with corner portions o~ such segment when formed from a moustache-shaped scoreline as previously provided. This arch-shaped scoreline has a prese-lected chord length as shown (between 88, 90) which is no greater than the widtll o~ the opener a~ such location overlying such chord; such preselected chord leng~h (about 0.50") can be maintained for difEering sized containers~
After such peripheral scoreline rupture, the removable disc is Lifted ~rom container 9~ as shown in ~ ~ FIG. 17.
In a typicaL end closure structure ~or a three 15 and 7/16 inch diamet~r ~307) can bod~ side wall ~ade ~rom flat rolled steel (75 '~/66, about .008" nominal thickness gage) ~etal plated and coatcd with a standard or~anic coatiny, the followiny data are representative:
~3~72~
Item Diameter Chime metal 28 (C.L.) 3.50"
; Chuck Wall 35 3.25"
: Bead 45 (~.L.) 3.22"
Transition zone 44 (ref.) 3.078"
Scoreline 34 (C.L.) 3.068"
~: Transition zone 43 (ref.) 3.064"
Rivet 32 (C.L.) 2.443 Other representative dimensions:
Item Dimensions Bead 45 (depth) .035"
(~idth) .050"
Chime metal 28 : (Cent*r Heigtlt above bottom of bead ~5) .150"
Rivet 32 ~ -(head diameter) .250"
(body diameter) .l~6"
Chord length (between legs 37, 38 at : : intersections 88, 90) 0.50"
Profiling panel 74 (dia~eter) ~.
Axial dimension between center of chime seam metal 2~ and panel ~9 ~ (FIG. 7) : ~ Typical thicknesses for flat rolled aluminum ond closures would be'.00g" to .012"~with residual metal thickness For ~scored severin~ .lines of about .004" to ; .005"-;:
.
, ' ' : , -1 3 ~
While specific values, materials, and configura-tions have been shown for purposes Oe speci~ically ; describing an embodiment of the invention, other values will be available in the light Oe the above teachings; therefore, for purposes o~ d~termining the scope of the presen~ invention reference should be made to the appended claims.
Claims (4)
1. Full-open, safety-edge, disc-removal, convenience-feature sheet metal end-closure structure, comprising an end wall panel (49) circumscribed by unitary chime seam metal (28) for attaching the end wall closure structure (27) to a container having a con-figuration which is symmetrical about a central longitudinal axis for container (94) with the central longitudinal axis intersecting the end closure panel (49) at its geometric center when the end closure structure (27) is attached to the container (94), such end wall panel being recessed axially in relation to such chime seam metal toward the interior for such a container, a bead (45) which is "U" shaped in cross section in a plane which includes such central longitudinal axis and having its closed end disposed axially inwardly toward the interior of the container (94), chuck wall (35) which is symmetrically disposed in relation to the geometric center or one panel (49) and extends in the axial direction from the chime seam metal (28) toward the axially-recessed end wall panel (49) with the outboard leg of the bead (45) forming an extension of the chuck wall (35), a peripheral scoreline (34) spaced inboard of the chuck wall (35) and "U" shaped bead (45) toward the geometric center of the end wall panel (49) defining a removable end wall disc (31) for providing an opening in the end closure structure (27) to facilitate full removal of container contents, a multi-layer sheet metal fold (40) located on the interior surface in relation to container (94) and circumscribing the removable end wall disc (31) contiguous to the peripheral scoreline (34) in a position to shield raw edge residual metal of periph-eral scoreline (34) upon rupture thereof, an elongate longitudinally-rigid opener (30) secured by a unitary rivet (32) to the removable disc (30) contiguous to and in substantially parallel relationship to such generally-planar configuration of the end wall panel (49) with the longitudinal axis of the elongate opener (30) being oriented toward tile peripheral scoreline (34) with the working end (33) of the elongate opener (30) contiguous to the peripheral scoreline (34), a multi-layer sheet metal fold (42) located outboard of and contiguous o the peripheral scoreline (34) on the exterior surface of the end wall panel (49) in relation to container (94) providing shield-ing or raw-edge residual scoreline metal remaining with the container (94) and also providing a barrier to outboard-directed movement of the elongate opener (30) with such multi-layer sheet metal fold (42) being located inboard of the shock-absorbing bead (45) so as to direct the working end (33) of the opener (30) toward the recessed panel (49) and the peripheral scoreline (34) to initiate rupture of a minor portion of the peripheral scoreline (34) by Class I lever action, an arch-shaped back scoreline means having a central portion (36) partial1y circumscribing and located inboard of the rivet (32) toward the geometric center of end wall panel (49) with a leg (37, 38) extending from the central portion (36) on each side of the rivet (32) each such leg having a major direc-tional component toward the adjacent portion of the inner shielding multi-layer sheet metal old (40) to form a chord of preselected length between intersec-tions (88, 90) with tile multi-layer sheet metal fold (40) on the end wall disc (31) the central portion (36) of the back scoreline means being ruptured by Class II lever action upon initial movement about such unitary rivet (32) as a fulcrum of the handle end (33) of the opener (30) with the handle end moving in a direction away from the end wall panel (49) in all arcuate path extending externally of the container (94) causing rupture along the back scoreline legs (37, 38) with the intersec-tions (88, 90) with fold (40) forming a fulcrum axis for continued arcuate direction movement of the elongate opener (30) to bring about contact of opener (30) with the chime seam metal (28) which acts as a fulcrum for continued Class I lever action opening which moves at least a portion of the removable disc (31) in an axial direction externally away from the container (94) to continue rupture of the peripherally located scoreline (34).
2. The structure of claim 1 in which the peripheral scoreline (34) presents a substan-tially circular configuration in plan view, and each multi-layer fold (40, 42) of sheet metal is of substantially circular configuration in plan view and is in contiguous relationship to the peripheral scoreline (34) with each multi-layer fold (40, 42) presenting a rounded-edge transition zone (43, 44) having a circum-ference approximating that of the peripheral scoreline (34) with the rounded edge transition zone (44) on the exterior of the end wall panel (49) having a prese-lected minimum circumference which is greater than the circumference of the peripheral scoreline (34), and the rounded edge transition zone (13) on the interior of the end wall panel (49) having a preselected maximum circumference which is less than the circum-ference of the exterior rounded transition zone (44).
3. Method for fabricating an abuse-resistant, full-panel, convenience feature end closure structure (27) for a cylindrical sidewall configuration Con-tainer (94) from flat-rolled sheet metal so as to provide shielding for residual raw edge metal remain-ing after severing a circular-configuration peripheral scoreline (34) defining such full-panel opening for such container, comprising forming chime seam metal (28) about the periphery of a substantially-planer flat rolled sheet metal blank for attaching end closure structure (27) to a cylindrical sidewall container (94), and countersinking an end wall panel (49) in the sheet metal blank radially inward of the chime seam metal (28) and disposed axially toward the interior of the container (94) from chime seam metal (28) with the countersinking step defining:
a substantially cylindrical-configuration chuck wall (35) contiguous to and extending from the chime seam metal (28) in the axial direction toward the interior of container (94), a peripheral rim (50) of sheet metal contiguous to chuck wall (35) and in substantially parallel rela-tionship with the countersunk end wall panel (49), and an intermediate configuration which is stepped in radial cross section in extending between the periph-eral rim (50) and the countersunk end wall panel (49), with the stepped configuration including a plurality of unitary sheet metal portions in angled relationship to each other with a compound curvilinear transition zone located at the peripheral rim (50) between each pair of angled sheet metal portions and at the end wall panel (49), forming a bead (45) which is "U" shaped in cross section in the peripheral rim (50) with the closed end of the "U" shaped bead (45) being disposed toward the interior of container (94), establishing an orientation which is substantial-ly perpendicularly transverse to the container central axis for a sheet metal portion (52) located inter-mediate other angled sheet metal portions (51, 53) of the stepped configuration between the "U" shaped head (45) and the countersunk end wall panel (49) the intermediate sheet metal portion (52) being established for locating a circular-configuration scoreline (34) therein on its exterior surface for defining the periphery of a disc (31) to be removed from the end closure structure (27), with the remaining angled sheet metal portions (51, 53) being located radially inboard and outboard of the intermediate sheet metal portion (52), orienting angled sheet metal portions located radially on each side of such intermediate sheet metal portion so as to be in acute-angled overlaying pre-folded relationship to each other to provide for a pair of multi-layer folds (40, 42) of sheet metal with the pre-folding orientation of such multi-layer folds of sheet metal being carried out to locate one each of such pair on opposite sides radially of a predetermined location for such circular-configuration peripheral scoreline (34) to be located on such inter-mediate sheet metal portion (52) and to locate one each of such pair on opposite surfaces of such end wall panel (49) so as to allow access for a scoring tool (64) on one surface and access for a backing-support tool (65) for such scoring on the remaining surface of the intermediate sheet metal portion (52), pre-forming a rivet button (62), for use in securing an opener (30) to end wall panel (49) during the pre-folding orientation of the multi-layer folds (40, 42) of sheet metal, then forming the circular-configuration peripheral scoreline (34) to substantially uniform depth in the intermediate sheet metal portion (52) while providing access between the multi-layer sheet metal folds (40, 42) as pre-folded for a scoring tool (64) on such exterior surface and for backing support tool (65) on the interior surface of such end wall panel, forming an arch-shaped back scoreline means having a central portion (36), at least partially cir-cumscribing the rivet button (32) radially inwardly thereof, and a leg (37, 38) extending from the central portion (36) on each side of the rivet button (32) in the direction of an adjacent portion of the chime seam (92) with the effective included angle between the directions for the legs (37, 38) being an acute angle, and completing disposition of the angularly pre-folded sheet metal portions in relation to the periph-eral scoreline (34) such that one each of the com-pound-curvilinear transition zones (43, 44) defines a circular configuration in plan view which is contigu-ous on its respective surface of the end wall panel (49) to the circular configuration peripheral score-line (34).
a substantially cylindrical-configuration chuck wall (35) contiguous to and extending from the chime seam metal (28) in the axial direction toward the interior of container (94), a peripheral rim (50) of sheet metal contiguous to chuck wall (35) and in substantially parallel rela-tionship with the countersunk end wall panel (49), and an intermediate configuration which is stepped in radial cross section in extending between the periph-eral rim (50) and the countersunk end wall panel (49), with the stepped configuration including a plurality of unitary sheet metal portions in angled relationship to each other with a compound curvilinear transition zone located at the peripheral rim (50) between each pair of angled sheet metal portions and at the end wall panel (49), forming a bead (45) which is "U" shaped in cross section in the peripheral rim (50) with the closed end of the "U" shaped bead (45) being disposed toward the interior of container (94), establishing an orientation which is substantial-ly perpendicularly transverse to the container central axis for a sheet metal portion (52) located inter-mediate other angled sheet metal portions (51, 53) of the stepped configuration between the "U" shaped head (45) and the countersunk end wall panel (49) the intermediate sheet metal portion (52) being established for locating a circular-configuration scoreline (34) therein on its exterior surface for defining the periphery of a disc (31) to be removed from the end closure structure (27), with the remaining angled sheet metal portions (51, 53) being located radially inboard and outboard of the intermediate sheet metal portion (52), orienting angled sheet metal portions located radially on each side of such intermediate sheet metal portion so as to be in acute-angled overlaying pre-folded relationship to each other to provide for a pair of multi-layer folds (40, 42) of sheet metal with the pre-folding orientation of such multi-layer folds of sheet metal being carried out to locate one each of such pair on opposite sides radially of a predetermined location for such circular-configuration peripheral scoreline (34) to be located on such inter-mediate sheet metal portion (52) and to locate one each of such pair on opposite surfaces of such end wall panel (49) so as to allow access for a scoring tool (64) on one surface and access for a backing-support tool (65) for such scoring on the remaining surface of the intermediate sheet metal portion (52), pre-forming a rivet button (62), for use in securing an opener (30) to end wall panel (49) during the pre-folding orientation of the multi-layer folds (40, 42) of sheet metal, then forming the circular-configuration peripheral scoreline (34) to substantially uniform depth in the intermediate sheet metal portion (52) while providing access between the multi-layer sheet metal folds (40, 42) as pre-folded for a scoring tool (64) on such exterior surface and for backing support tool (65) on the interior surface of such end wall panel, forming an arch-shaped back scoreline means having a central portion (36), at least partially cir-cumscribing the rivet button (32) radially inwardly thereof, and a leg (37, 38) extending from the central portion (36) on each side of the rivet button (32) in the direction of an adjacent portion of the chime seam (92) with the effective included angle between the directions for the legs (37, 38) being an acute angle, and completing disposition of the angularly pre-folded sheet metal portions in relation to the periph-eral scoreline (34) such that one each of the com-pound-curvilinear transition zones (43, 44) defines a circular configuration in plan view which is contigu-ous on its respective surface of the end wall panel (49) to the circular configuration peripheral score-line (34).
4. The method of claim 3 in which the elongate longitudinally-rigid tab opener (30) is secured to the end wall panel (49) with its working end (33) contigu-ous to the peripheral scoreline (34) using the rivet button (62) which is unitary with such end wall panel by placing a rivet button opening of opener (30) over the rivet button (62) and forming the rivet button (62) into rivet (32) to make the opener (30) integral with the removable disc (31) with the longitudinal axis of elongate opener (30) being disposed to be coincident with a diameter of end wall panel (49), and in which the transition zone (44) on the exterior surface of the end wall panel (49) is located to act as a barrier to radial movement of the integral opener (30) and to direct the working end ( 33) of opener (30) inwardly of container (94) toward the peripheral scoreline (34).
Applications Claiming Priority (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1987/000102 WO1988005405A1 (en) | 1987-01-23 | 1987-01-23 | Disc removal end wall structure with safety features |
| USPCT/US87/02649 | 1987-09-29 | ||
| PCT/US1987/002649 WO1988005406A1 (en) | 1987-01-23 | 1987-09-29 | Disc removal end wall structure with safety features |
| PCT/US1987/003418 WO1988005407A1 (en) | 1987-01-23 | 1987-12-23 | Disc removal end wall structure with safety features |
| USPCT/US87/03418 | 1987-12-23 | ||
| US07/147,267 US4804106A (en) | 1987-09-29 | 1988-01-22 | Measures to control opening of full-panel safety-edge, convenience-feature end closures |
| US07/147267 | 1988-01-22 | ||
| PCT/US1988/002475 WO1989002853A1 (en) | 1987-09-29 | 1988-07-20 | Measures to control opening of full-panel safety-edge, convenience-feature end closures |
| PCT/US1988/002512 WO1989002854A1 (en) | 1987-01-23 | 1988-07-22 | Abuse resistant, safety-edge, controlled-opening convenience-feature endclosures |
| USPCT/US88/02512 | 1988-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1317241C true CA1317241C (en) | 1993-05-04 |
Family
ID=42985606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000578752A Expired - Fee Related CA1317241C (en) | 1987-01-23 | 1988-09-28 | Abuse resistant, safety-edge, controlled-opening convenience-feature endclosures |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0333805A1 (en) |
| JP (1) | JPH02502814A (en) |
| CN (1) | CN1039769A (en) |
| AU (1) | AU2321588A (en) |
| CA (1) | CA1317241C (en) |
| DK (1) | DK215489A (en) |
| ES (1) | ES2015426A6 (en) |
| FI (1) | FI892499A0 (en) |
| MX (1) | MX173559B (en) |
| NO (1) | NO891977L (en) |
| PT (1) | PT91227B (en) |
| WO (1) | WO1989002854A1 (en) |
| ZA (1) | ZA894521B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4490847B2 (en) * | 2005-02-23 | 2010-06-30 | サントリーホールディングス株式会社 | Can lid and can container equipped with the same |
| JP4731188B2 (en) | 2005-03-22 | 2011-07-20 | 大和製罐株式会社 | Easy-to-open can lid |
| PL2505508T3 (en) * | 2011-03-31 | 2017-01-31 | Ardagh Mp Group Netherlands B.V. | A container body, a container and a method of making a container body |
| KR200478678Y1 (en) * | 2013-10-02 | 2015-11-04 | 이규택 | A safety can |
| CN104174783B (en) * | 2014-07-15 | 2016-07-06 | 广东英联包装股份有限公司 | The manufacture method of the bilateral easy-open lid not hurt hands after a kind of opening |
| US10005117B2 (en) * | 2015-10-20 | 2018-06-26 | Admc Holding, Llc | End cap seaming apparatus and method for seaming an end cap |
| CN108482798B (en) * | 2018-03-23 | 2020-05-19 | 烟台亿拉得包装科技股份有限公司 | Lever type easy-to-draw bottle cap |
| JP2021187470A (en) | 2020-05-28 | 2021-12-13 | 大和製罐株式会社 | Tab for can-top and can-top |
| JP2021187471A (en) | 2020-05-28 | 2021-12-13 | 大和製罐株式会社 | Can-top |
| CN113928681A (en) * | 2021-10-28 | 2022-01-14 | 珠海博瑞特包装科技有限公司 | Double-edge-protection full-open cover |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3195767A (en) * | 1961-02-10 | 1965-07-20 | Continental Can Co | Plastic pull tab to metal tear strip connection with mechanical interlock |
| US3186582A (en) * | 1961-10-30 | 1965-06-01 | Continental Can Co | Pivoted pull handle for easy opening scored ham can end |
| FR2112094B1 (en) * | 1970-10-30 | 1973-11-23 | Carnaud & Forges | |
| US3875884A (en) * | 1971-11-03 | 1975-04-08 | Nat Can Corp | Full open end and method of making |
| US3833144A (en) * | 1972-07-10 | 1974-09-03 | American Can Co | Two position pull tab easy-open container component |
| US3813001A (en) * | 1972-08-31 | 1974-05-28 | Continental Can Co | Latching arrangement for ring pull tab of an easy opening container |
| JPS5343349A (en) * | 1976-10-01 | 1978-04-19 | Mitsubishi Electric Corp | Folding gate for elevator |
| JPS5751412Y2 (en) * | 1978-07-28 | 1982-11-09 |
-
1988
- 1988-07-22 JP JP88507099A patent/JPH02502814A/en active Pending
- 1988-07-22 MX MX015415A patent/MX173559B/en unknown
- 1988-07-22 WO PCT/US1988/002512 patent/WO1989002854A1/en not_active Application Discontinuation
- 1988-07-22 EP EP88908041A patent/EP0333805A1/en not_active Withdrawn
- 1988-07-22 AU AU23215/88A patent/AU2321588A/en not_active Abandoned
- 1988-09-28 CA CA000578752A patent/CA1317241C/en not_active Expired - Fee Related
-
1989
- 1989-05-02 DK DK215489A patent/DK215489A/en not_active Application Discontinuation
- 1989-05-18 NO NO89891977A patent/NO891977L/en unknown
- 1989-05-23 FI FI892499A patent/FI892499A0/en not_active IP Right Cessation
- 1989-06-14 ZA ZA894521A patent/ZA894521B/en unknown
- 1989-07-20 PT PT91227A patent/PT91227B/en not_active IP Right Cessation
- 1989-07-21 CN CN89104938A patent/CN1039769A/en active Pending
- 1989-07-21 ES ES898902590A patent/ES2015426A6/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO1989002854A1 (en) | 1989-04-06 |
| CN1039769A (en) | 1990-02-21 |
| MX173559B (en) | 1994-03-16 |
| FI892499A (en) | 1989-05-23 |
| PT91227B (en) | 1995-07-06 |
| NO891977L (en) | 1989-07-28 |
| AU2321588A (en) | 1989-04-18 |
| NO891977D0 (en) | 1989-05-18 |
| DK215489A (en) | 1989-05-26 |
| EP0333805A1 (en) | 1989-09-27 |
| ZA894521B (en) | 1990-03-28 |
| JPH02502814A (en) | 1990-09-06 |
| PT91227A (en) | 1990-02-08 |
| ES2015426A6 (en) | 1990-08-16 |
| DK215489D0 (en) | 1989-05-02 |
| FI892499A0 (en) | 1989-05-23 |
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| MKLA | Lapsed |