WO2006050465A1 - Can end - Google Patents
Can end Download PDFInfo
- Publication number
- WO2006050465A1 WO2006050465A1 PCT/US2005/039847 US2005039847W WO2006050465A1 WO 2006050465 A1 WO2006050465 A1 WO 2006050465A1 US 2005039847 W US2005039847 W US 2005039847W WO 2006050465 A1 WO2006050465 A1 WO 2006050465A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- end shell
- bead
- countersink
- shell
- Prior art date
Links
Classifications
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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
-
- 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
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/12—Cans, casks, barrels, or drums
-
- 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
- B65D17/06—Integral, or permanently secured, end or side closures
- B65D17/08—Closures secured by folding or rolling and pressing
-
- 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
- B65D2517/001—Action for opening container
- B65D2517/0014—Action for opening container pivot tab and push-down tear panel
-
- 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
- B65D2517/0059—General cross-sectional shape of container end panel
- B65D2517/0061—U-shaped
- B65D2517/0062—U-shaped and provided with an additional U-shaped peripheral channel
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S220/00—Receptacles
- Y10S220/906—Beverage can, i.e. beer, soda
Definitions
- This invention relates to a can end and a method of manufacture of such a can end.
- it relates to a can end which has improved performance characteristics.
- Containers such as cans which are used for the packaging beverages, for example, may contain a carbonated beverage which is at a higher than atmospheric pressure.
- Can end design has been developed to withstand this "positive" buckle pressure (sometimes also referred to as “peaking" pressure) up to defined minimum values (currently 90 psi for carbonated soft drinks) under normal operating conditions before failure.
- Peaking pressure sometimes also referred to as “peaking” pressure
- defined minimum values currently 90 psi for carbonated soft drinks
- the can end shell (that is, the unseamed can end) of that patent includes a peripheral curl, a seaming panel, a chuck wall at an angle of between 30° and 60°, a narrow anti-peaking bead and a center panel.
- the chuck wall is deformed at its upper end by contact with an anvil portion of the seaming chuck.
- the resulting profile provides a very strong double seam since the annulus formed by the seam has very high hoop strength and will resist distortion from its circular profile when subjected to thermal processing or when packaging carbonated beverages.
- Stiffness is also provided to the beverage can end by the anti-peaking or countersink bead.
- This is an outwardly concave bead comprising inner and outer walls, joined by a curved portion.
- this bead has walls which are substantially upright, although either may vary by up to +/- 15°.
- This patent uses a small base radius (best fit) for the bead, typically 0.75 mm or less.
- Can ends such as those described in the above patents have high hoop strength and/or improved buckle performance such that they resist deformation when subjected to high internal pressure.
- the buckle pressure of the end of the '634 patent is well above the 90 psi can making industry minimum standard.
- This invention seeks to control the failure mode and to avoid catastrophic failure and leaking, whilst still achieving buckle pressure performance well above the industry stipulated pressure of 90 psi.
- a can end shell comprising a center panel, a countersink bead, an inclined chuck wall portion, and a seaming panel, and further including one or more control features, each feature extending around an arc of part of the countersink bead and/or the chuck wall whereby the failure mode of the can end, when seamed to a can body, is controlled, and in which the or each control feature comprises one or more of: an expansion of the countersink bead, a shelf in the outer wall of the countersink, an indentation in the chuck wall, and/or coining.
- arc as used herein is intended to include a 360° arc, i.e. a control feature or features which extend around the whole circumference of the can end shell.
- inclined is not intended to be limiting and the inclined chuck wall may have one or more parts, any of which may be linear or curved, for example.
- a control feature such as a selectively weakened region, may be introduced onto the can end in a variety of different ways, all of which are intended to limit or prevent the concentration of strain. Control features or weakenings may be achieved by increasing the radial position of the outer wall of the countersink bead, a shelf in the countersink bead, an indentation in the chuck wall, or coining. Numerous variations are possible within the scope of the invention, including those set out below.
- a shelf in the countersink bead will be in the outer wall of the bead, and may be at any position up that wall. Clearly when the shelf is at the lower end of the outer wall it effectively corresponds to an expansion in the bead radius.
- a shelf or groove may be provided on any part of a radial cross-section through the bead but as the inner wall diameter position is often used as a reference for machine handling purposes and the thickness of the base of the countersink should ideally not be reduced, the outer wall is the preferred location.
- an indentation in the chuck wall should be made so that in the seamed can end, the indentation is positioned approximately at the root of the seam.
- the indentation should be made about halfway up the chuck wall or in the upper half of the chuck wall, depending on the type of seam.
- the indentation may be made using radial and indent spacers to control the radial and penetration depth of the tool.
- a control feature may extend over a single arc behind the heel of the tab, centered on a diameter through the tab rivet and nose.
- the arc length may be anything up to 90° in order to encompass any "thin point" due to orientation relative to grain orientation.
- a control feature may comprise a combination, of different types of control features, usually over at least a portion of the same arc of the can end such that, where the arcs are not fully circumferential, the different types are centered on the same can end diameter.
- the indentation in the chuck wall may extend over the same length of arc as the bead expansion, a longer or a shorter arc length, with the centers of the arcs being on the same end diameter, hi yet another embodiment, there may additionally be a shelf-type groove, as well as the bead expansion and chuck wall indentation.
- the countersink bead may have its base radius enlarged and then incorporate a control feature comprising a shelf in its outer wall, hi one example, the arc length of the bead expansion (and, where present, the shelf) is less than the arc length of the chuck wall indentation, such that the bead expansion (and slielf) acts as a trigger for local peaking.
- control feature comprises an indentation or coined region on the chuck wall
- this may extend either internally or externally, or a combination of these around the arc.
- it is the side of the can end to which a tab is fixed which is referred to as “external” as this side will be external in the finished can.
- the indentation extends inwardly as otherwise it may be removed by the seaming tool during seaming.
- the end shell may additionally include coining of a shoulder between the inner wall of the countersink and the centermayel over an arc or pair of arcs.
- control feature is preferably made in a conversion press but it may be made in a shell press or even in a combination of the shell and conversion, presses providing that orientation of the end is not an issue.
- a can end shell and seamed can end having an increased wall angle that forms a control feature ox weakening.
- the unseamed end includes a circumferentially extending peripheral curl including a cover hook, a seaming panel, and a radiused portion; a wall extending circumferentially and radially inward from said radiused portion of said peripheral curl at a first point; an annular reinforcing bead extending radially inward from said wall at a second point, wherein a line between said first and second points is inclined between about 30° and about 60° with respect to an axial centerline of said can end; a center panel; and one or more control features, each control feature extending around an arc of at least part of the countersink bead and/or the chuck wall, whereby the failure mode of the can end, when seamed to a can body, is controlled, and in which the or each control featixre comprises one or more of: an expansion of the countersink bea
- the wall comprises an upper wall portion and a lower wall portion and a juncture therebetween, said upper wall portion extending inwardly from said first point, said lower wall portion extending radially outwardly from said second pooit.
- the lower wall portion preferably is inclined greater than 46°, preferably between 45 ° and 60°, more preferably between 46° and 54°, more preferably between 48° and 54°, and most preferably about 52°.
- the can end shell may also be formed with the above inclined wall without other control feature or weakening.
- Such seamed can end includes a circumferentially extending peripheral curl including a cover hook, a seaming panel, and a radiused portion; an annular reinforcing bead extending radially inward from said wall lower portion at a second point, wherein a line between said first and second points is inclined between about 20° and about 60° with respect to the axial centerline; a center panel; and a wall extending circumferentially and radially inwardly from said radiused portion of said peripheral curl at a first point and extending circumferentially and radially outwardly from the bead at a second point; said wall including a lower portion, an upper portion, and a juncture therebetween, said lower wall portion being inclined between 46° and 60° with respect to an axial centerline of said can end and measured between said second point and said juncture.
- the lower wall portion preferably is inclined between 46° and 54°, more preferably, between 48° and 54°, even more preferably at approximately 52°.
- Figure 1 is a perspective view of a conventional beverage can end
- Figure 2 is a plan view of another type of beverage can end
- Figure 3 is a partial side section of the can end of figure 2, prior to seaming;
- Figure 4 is a partial side section of the can end of figure 2, after seaming to a can body;
- Figure 5 is a sectioned perspective view of a seamed can end having two types of control features
- Figure 6 is a cross-sectional view of an unseamed can end illustrating another embodiment of the present invention.
- Figure 7 is a cross-sectional view of another embodiment of the unseamed can end;
- Figure 8 is a cross-sectional view of the can end of Figure 7 that has been seamed onto a container.
- the can end of figure 1 is a conventional beverage end shell 1 comprising a peripheral curl 2 which is connected to a center panel 3 via a chuck wall 4 and anti- peaking reinforcing bead or countersink 5.
- the center panel has a score line 6 which defines an aperture for dispensing beverage.
- a tab 7 is fixed to the center panel 3 by a rivet 8, as is usual practice. Beads 9 are provided for stiffening the panel.
- an internal pressure of 98 psi before buckling, 8 psi above the required minimum buckle pressure of 90 psi When the pressure approaches and exceeds this value, the circular shape of the periphery of the end will distort and become oval. Eventually the center panel will be forced outwardly so that the countersink "unravels" and flips over an arc of its circumference. Whilst a can which is buckled in such a manner is unlikely to be acceptable to a consumer, the can end itself is still intact, the tab 7 is still accessible and there is no compromise to the sealing of the container by such failure which could result in leaking of the contents.
- a container has an end which is, by virtue of its design, substantially stiffer and has greater hoop strength than that of figure 1, the buckle failure mode differs from that described above.
- a can end is that of the '634 patent, shown for reference in figures 2 to 4.
- the can end 20 is attached to a can body 21 by a double seam 22, as shown in figure 4.
- Inner portion 23 of the seam 22, which is substantially upright, is connected to a countersink bead 25 by a chuck wall 24.
- the countersink, or anti-peaking bead 25 has inner and outer walls 26 and 27, the inner wall 26 depending from the center panel 28 of the end.
- Control features in accordance with the invention can take a variety of forms including, without limitation, one or more of the following with reference to figures 3 and 4:
- the radial position of the outer wall 27 of the countersink bead may be increased;
- the chuck wall 24 may be coined or have indentations at or above approximately the mid-point such that this control feature is at the root of the seam 22 in the seamed can end (denoted as B');
- a shelf may be made in the outer wall 27 of the countersink bead.
- a type D region is at the lower part of the outer countersink wall, this may be equivalent to a type A control feature. Higher up the outer wall, a type D region takes the clear form of a shelf.
- the shell of figures 2 to 4 was modified by a local groove in the outer wall of the countersink.
- This groove was ideally adjacent the handle of the tab so that any failure of the can end would be away from the score. Positioning either side of the tab or, indeed, at any position around the countersink was also considered possible.
- the groove was typically about 8 mm in arc length and was positioned approximately halfway down the outer wall of the countersink bead, in the form of a shelf. Computer modelling has showed that the provision of such a groove resulted in a failure mode similar to that of a conventional can end such as that of figure 1 , with no leakage.
- AU cans tested peaked at the control feature without splitting. As with preliminary bench testing, the position of peaking was focussed on the indentation site.
- Can ends modified in this way were also tested by pressurising a can to which the end was seamed ("seamed end test"). These results are shown in table 2. Whilst the cans all peaked on the indentation site and were still openable after peaking, only 25% survived testing without leaking on the peak location.
- the chuck wall indentations comprised a indentation on each side of the tab, set at 90° to the tab.
- Spacer conditions were as in example 3, but with a 9 mm indent ring spacer (rather than 8.75 mm).
- the countersink "trigger” comprised a single bead expansion within the arc of the chuck wall indentation and centered on the same diameter (arc mid-point). This bead expansion was selected to trigger a peak within the chuck wall indentation as identified in example 2.
- the control can ends give very IO ⁇ V survival figures in both drop tests and seamed end testing (SET), i.e. the control can ends leak when they peak.
- the chuck wall indentation alone gives good hot drop (100°F) and SET performance but seems to have higher incidence of score bursts during hot drop testing.
- the countersink (“c'sk”) bead trigger creates a very symmetric end shape from trie hot drop test and is very effective in detennining the peak location.
- the countersink trigger reduces the SET performance to 89 psi average, but this is believed to be attributable to the tooling used to create the indentations.
- “1” means yes and "0” means no, except in position in which 1 indicates the position of peak on the control feature.
- control samples unmodified can ends
- can ends having a 360° control feature in the form of a shelf in the outer wall of the countersink bead results of these trials are given in table 8.
- Buckle pressure performance was well above the 90 psi industry standard for all cans, both standard and modified. Only 25% of the control samples survived testing without leaking, whereas 100% of the cans having a control feature (circumferential shelf in the countersink bead) passed the test without leaking.
- FIG. 6 shows an embodiment that illustrates the present invention.
- An unseamed can end 29 includes a center panel 30, a reinforcing bead 35 extending outwardly from center panel 30, a wall 38 extending outwardly from the reinforcing bead 35, and a peripheral curl 40 extending outwardly from wall 38.
- Reinforcing bead 35 includes inner sidewall 36 and outer sidewall 37 with a bottom portion 38 therebetween.
- the bottom portion 38 may be formed of any shape, and preferably includes at least one curve.
- Peripheral curl 40 includes a radiused portion 45 that merges into chuck wall upper portion 44, a seaming panel 47, and a peripheral cover hook 48 suitable for forming a double seam with a can body.
- the reinforcing bead 35 preferably includes a weakening in the bead that increases the circumferential extent of the eversion of the bead at failure, thereby preventing the peak and leak condition.
- a weakening can be in the form of a coined and/or expanded section of the bead.
- the expansion of the bead maybe in the form of an increase in the diameter of only a portion of the height of the bead outer wall, which can be done around the entire circumference or over only a portion of the circumference, or an increase in the diameter of the bead outer wall over its entire height but only around a portion of its circumference.
- the weakening is in the form of an expanded portion 50 in which the diameter of the upper portion of the bead outer wall is increased around its entire circumference.
- the vertical depth of the expanded portion is in the range of is in the range of 0.370 to 0.390 inch, and most preferably approximately 0.385 inches, while the increase in the diameter is preferably in the range of 0.026 inches to 0.043 inches, and most preferably approximately 0.033 inches.
- Wall 38 includes a lower portion 42, an upper portion 44, and a juncture 46 therebetween.
- Juncture 46 encompasses any transition, such as a sharp transition between upper and lower wall portions or a radiused portion interposed therebetween.
- a point B is defined as the transition between bead outer wall 37 and lower portion 42 of chuck wall 38.
- a point C is defined as the transition between chuck wall 38 and peripheral curl 40.
- Chuck wall lower portion 42 preferably is substantially straight and sloped such that its axis forms an angle Al with a vertical axis of, preferably, between 46° and 54°, more preferably between 48° and 54°, and most preferably 52°, as demonstrated by the data provided in Tables 9 - 13.
- the upper limit on angle Al will depend on the diameter and depth of center panel, bead configuration and dimensions, end thickness, and like practical parameters. The inventors estimate that 60° is an effective upper practical limit of angle Al.
- Wall upper portion 44 preferably is substantially straight and sloped such that its axis forms an angle A2 with respect to a vertical ax:is of that is less than angle Al, and preferably less than about 44°, and more preferably approximately 28°.
- angle A2 promotes alignment of the can end onto the can body in the seamer and aids in the material deformation that occurs in the first seaming operation.
- angles Al and A2 preferably may be chosen such that a line between point B and point C forms an angle of between 20° and 60°, more preferably between 30° and 55°, even more preferably between 40° and 50, and most preferably approximately 43°.
- the present invention is not limited to walls 42 and 44 that are straight, but rather encompasses walls that are convex when viewed from above.
- Figure 6 schematically illustrates a centerline of a convex lower wall at D.
- the angle Al may be measured between points B and juncture 46.
- Table 9 shows the inclination Al of lower wall portion 42 of the can end, the tool angle used in the shell press that forms the lower wall portion 42, and
- the ends on which the data in Tables 9 through 13 are based also includes an expansion 50 on the upper portion of the bead outer wall 37 extending 360° around the end and approximately 0.385 inches axially deep and approximately 0.0165 in radial dimension, as shown in Figure 6.
- the ends were formed of 0.082 inch aluminium.
- Table 10 provides drop test results and failure modes for the end shown in Figure 6 that is seamed onto a can end.
- the seam is shown in Figure 8. Percentages are shown in parenthesis.
- the term “score burst” refers to rupture of the score.
- the term “vent” refers to a pin hole or slight fracture at the score that depressurizes the can, but is not a fracture of sufficient magnitude to be characterized as a burst.
- Reference J-3 is identical to reference J except its bead wall expansion is 0.003 inches smaller in penetration or vertical magnitude.
- Each can was pressurized to approximately 60 psi by injection of approximately four volumes of carbon dioxide into water, and temperatures of between 69°F and 73 °F were chosen for the cans to equalize the small differences in pressurization such that the internal pressure of the cans was 60 psi.
- the end designated by reference H having a wall angle of 52°, shows a somewhat higher percentage of ends that peak but do not leak and, thus, a lower percentage of ends that burst or vent at the score compared with the other ends.
- Table 11 provides the numbers and percentages for each type of failure mode during a heating test, in which seamed cans were laid on their sides and heated to 130°F for two to three hours. As shown below, leaking at the peak occurred only once for any of the cans tested.
- Table 12 provides the pressure at which the unseamed, non-aged can ends failed in an Altek tester. To simulate the hoop strength of the seamed can end, the Altek tester was modified to constrain radial movement of the end. The failure mode is also provided. In Table 12, "L” refers to a leak at the peak. Table 13 provides pressure test data for a seamed can end.
- a unseamed can end 29' is identical to end 29 of Figure 6 except bead 35' does not have an expanded outer wall.
- the components of end 29' are shown with a prime designation to indicate their correspondence with like components of the embodiment of Figure 6.
- dimension Dl is 1.688 inches; D2 is 1.804 inches, and D3 is 2.169 inches.
- Figure 7 provides other preferred dimensional information merely to illustrate the embodiment for a size 202 can end, but such dimensional information is not intended to limit the scope of the invention unless expressly set forth in the claims.
- Unseamed end 29' that is, without an expansion of countersink bead 35 or other additional weakening feature, provides improved fracture resistance, when seamed onto a can body, upon failing compared with seamed ends having a wall inclined to 43.5 degrees. For example, no cans formed with an ed 29' leaked in a heating test. Table 14 provides the failure modes by percent of ends 29' having an angle Al of 52° in a drop test. The cans were pressurized to 55 psi. Seven percent of the seamed ends leaked at the peak.
- the unseamed can end 29' withstood 100.4 psi and the seamed end withstood 84.6 psi.
- the present invention encompasses an end having a wall inclined at an angle Al equal to or greater than 46° and preferably below 60°, preferably in between approximately 48° and approximately 54°, and most preferably approximately 52°.
- Al an angle equal to or greater than 46° and preferably below 60°, preferably in between approximately 48° and approximately 54°, and most preferably approximately 52°.
- Preferred ranges of angle Al are provided for the ends shown in Figures 6 and 7.
- the range of angles Al from 46° to 60° takes into consideration the strength and rigidity of ends of other configurations such that the range covers walls that enable the bead to unravel before the bead collapses, which provides the improved failure mode discussed herein.
- Figure 8 illustrates a seamed can that includes a can body 60 and an end 129 seamed thereto.
- a seam 62 is formed by portions of the can body 60 and end 129.
- End 129 includes a center panel 130, a reinforcing bead 135 having an outer wall 137, and an inclined wall 142.
- a portion 144 which corresponds to upper wall portions 44 and 44' of the unseamed can ends 29 and 29', respectively, of end 129 forms a portion of seam 62.
- a portion of chuck 70 is shown in Figure 8.
- Chuck 70 includes a chuck wall 72 that is inclined as indicated in Table 9.
- control features of the invention are particularly intended for use on beverage can ends which are to be fixed to a can body and thereby subjected to internal pressure.
- control features may be used on can ends having any chuck wall angle whether conventional (less than 15°) or larger, such as that of the '634 patent, i.e. 30° to 60°.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005302008A AU2005302008B2 (en) | 2004-11-01 | 2005-11-01 | Can end |
CA2586079A CA2586079C (en) | 2004-11-01 | 2005-11-01 | Can end |
KR1020077011663A KR101251989B1 (en) | 2004-11-01 | 2005-11-01 | Can end |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/979,068 | 2004-11-01 | ||
US10/979,068 US7591392B2 (en) | 2002-04-22 | 2004-11-01 | Can end |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006050465A1 true WO2006050465A1 (en) | 2006-05-11 |
Family
ID=35785571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/039847 WO2006050465A1 (en) | 2004-11-01 | 2005-11-01 | Can end |
Country Status (5)
Country | Link |
---|---|
US (4) | US7591392B2 (en) |
KR (1) | KR101251989B1 (en) |
AU (1) | AU2005302008B2 (en) |
CA (1) | CA2586079C (en) |
WO (1) | WO2006050465A1 (en) |
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US8939695B2 (en) | 2011-06-16 | 2015-01-27 | Sonoco Development, Inc. | Method for applying a metal end to a container body |
US8998027B2 (en) | 2011-09-02 | 2015-04-07 | Sonoco Development, Inc. | Retort container with thermally fused double-seamed or crimp-seamed metal end |
US10131455B2 (en) | 2011-10-28 | 2018-11-20 | Sonoco Development, Inc. | Apparatus and method for induction sealing of conveyed workpieces |
US10399139B2 (en) | 2012-04-12 | 2019-09-03 | Sonoco Development, Inc. | Method of making a retort container |
WO2021016415A3 (en) * | 2019-07-24 | 2021-04-01 | Ball Corporation | Seam seal for wine in beverage cans |
EP3676029A4 (en) * | 2017-08-30 | 2021-08-25 | Stolle Machinery Company, LLC | Pressure can end compatible with standard can seamer |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Also Published As
Publication number | Publication date |
---|---|
CA2586079A1 (en) | 2006-05-11 |
KR20070109978A (en) | 2007-11-15 |
US20130306658A1 (en) | 2013-11-21 |
US7591392B2 (en) | 2009-09-22 |
CA2586079C (en) | 2014-05-27 |
US8851323B2 (en) | 2014-10-07 |
AU2005302008A1 (en) | 2006-05-11 |
US20120175376A1 (en) | 2012-07-12 |
US20050115976A1 (en) | 2005-06-02 |
US8157119B2 (en) | 2012-04-17 |
AU2005302008B2 (en) | 2012-01-12 |
US8496132B2 (en) | 2013-07-30 |
KR101251989B1 (en) | 2013-04-08 |
US20100044383A1 (en) | 2010-02-25 |
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