U.S. patent application number 11/235827 was filed with the patent office on 2006-04-06 for container end closure with improved chuck wall and countersink.
Invention is credited to Joseph D. Bulso.
Application Number | 20060071005 11/235827 |
Document ID | / |
Family ID | 36119518 |
Filed Date | 2006-04-06 |
United States Patent
Application |
20060071005 |
Kind Code |
A1 |
Bulso; Joseph D. |
April 6, 2006 |
Container end closure with improved chuck wall and countersink
Abstract
The present invention describes a beverage can end which
utilizes less material and has an improved internal buckle strength
based on the geometric configuration of a chuck wall, inner panel
wall and central panel, and which, in one embodiment utilizes an
arcuate shaped chuck wall with a radius of curvature between about
0.150 inches and 0.250 inches with at least one transition zone
positioned between an upper and lower end of the chuck wall.
Inventors: |
Bulso; Joseph D.; (Canton,
OH) |
Correspondence
Address: |
SHERIDAN ROSS PC
1560 BROADWAY
SUITE 1200
DENVER
CO
80202
US
|
Family ID: |
36119518 |
Appl. No.: |
11/235827 |
Filed: |
September 26, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60613988 |
Sep 27, 2004 |
|
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|
Current U.S.
Class: |
220/619 ;
220/906 |
Current CPC
Class: |
B65D 7/04 20130101; B65D
7/36 20130101; Y10S 220/906 20130101; B65D 17/08 20130101 |
Class at
Publication: |
220/619 ;
220/906 |
International
Class: |
B65D 6/28 20060101
B65D006/28 |
Claims
1. A container end closure adapted for interconnection to a
container body, comprising: a circular end wall adapted for
interconnection to a side wall of the container body; a chuck wall
integrally interconnected to said circular end wall and extending
downwardly at an angle .theta. as measured from a vertical plane,
said chuck wall further comprising an outwardly extending arch
having a radius of curvature of between about 0.015 and 0.080
inches with a center point positioned above said circular end wall;
a countersink interconnected to a lower portion of said chuck wall
and having a radius of curvature of less than about 0.025 inches; a
non-linear transition zone positioned between a lower portion of
said outwardly extending arch and said countersink having a length
of at least about 0.0070 inches and an orientation which is
distinct from said chuck wall; an inner panel wall interconnected
to said countersink and extending upwardly at an angle .phi. of
between about 0 degrees and 15 degrees as measured from a
substantially vertical plane; and a central panel interconnected to
an upper end of said inner panel wall and raised above a lowermost
portion of said countersink.
2. The container end closure of claim 1, wherein said central panel
is positioned at least about 0.150 inches below an uppermost
portion of said circular end wall.
3. The container end closure of claim 1, wherein a lower portion of
said chuck wall has a substantially arcuate shape.
4. The container end closure of claim 1, wherein said radius of
curvature of said outwardly extending arch is greater than about
0.010 inches.
5. The container end closure of claim 1, further comprising a
second transition zone positioned within said chuck wall, said
second transition zone comprising a non-linear shape which is
distinct from said chuck wall.
6. The container end closure of claim 1, wherein the
interconnection of said central panel and said inner panel wall has
a radius of curvature no greater than about 0.040 inches.
7. The container end closure of claim 1, wherein said upper portion
of said chuck wall is oriented at an angle less than 15 degrees
with respect to a vertical plane.
8. The container end closure of claim 1, wherein said chuck wall is
comprised of an upper chuck wall and a lower chuck wall which have
two distinct radius of curvature.
9. The container end closure of claim 1, wherein said chuck wall is
oriented at an angle no greater than about 30 degrees.
10. The container end closure of claim 1, wherein said inner panel
wall is non-linear.
11. The container end closure of claim 10, wherein said inner panel
wall has at least one radius of curvature between about 0.030
inches and 0.070 inches.
12. A container end closure, comprising: a circular end wall
adapted for interconnection to a neck of a container; a non-linear
chuck wall integrally interconnected to a lower end of said
circular end wall and extending downwardly, said chuck wall
comprising an inwardly oriented arch having a radius of curvature
of at least about 0.140 inches; a countersink interconnected to a
lower portion of said chuck wall and a lower portion of an inner
panel wall and having a radius of curvature less than about 0.015
inches; and a central panel interconnected to an upper end of said
inner panel wall and raised above a lowermost portion of said
countersink no greater than about 0.090 inches; and at least one
transition zone positioned between an upper end and a lower end of
said chuck wall and comprising a non-linear variation in the chuck
wall geometry with a horizontal length and a vertical length no
greater than about 0.010 inches.
13. The container end closure of claim 12, wherein said chuck wall
further comprises an outwardly extending non-linear upper chuck
wall positioned above said outwardly oriented arch.
14. The container end closure of claim 13, wherein said non-linear
upper chuck wall has a radius of curvature of between about 0.015
inches and 0.20 inches.
15. The container end closure of claim 12, wherein said inner panel
wall is non-linear.
16. The container end closure of claim 12, wherein said central
panel has a diameter less than about 75 percent of the outer
diameter of said circular end wall.
17. A metallic container end closure adapted for interconnection to
a container body, comprising: a circular end wall adapted for
interconnection to a side wall of the container body; an outwardly
extending upper chuck wall portion integrally interconnected to a
lower end of said circular end wall and having a radius of
curvature of at least about 0.015 inches; an inwardly extending
lower chuck wall portion integrally interconnected to a lower end
of said upper chuck wall and having a radius of curvature of at
least about 0.100 inches; a countersink integrally interconnected
to said lower chuck wall portion on a first end and a lower end of
an inner panel wall on a second end, said inner panel wall
extending upwardly at an angle .phi. of between about 0-4 degrees;
and a central panel interconnected to an upper end of said inner
panel wall, said central panel positioned above a lowermost portion
of said countersink a distance no greater than about 0.090
inches.
18. The metallic container end closure of claim 17, wherein said
inner panel wall and said outer panel wall of said countersink are
separated by a distance of no greater than about 0.054 inches.
19. The metallic container end closure of claim 17, wherein said
upper portion of said lower chuck wall is elevated above a lower
end of said upper chuck wall.
20. An end closure adapted for interconnection to a container body,
comprising: a circular end wall; an inwardly oriented arcuate chuck
wall integrally interconnected to said circular end wall and
extending downwardly therefrom; an outwardly projecting arch
positioned proximate to an upper end of said chuck wall, and having
a radius of curvature of between about 0.015-0.030 inches; and an
annular countersink integrally interconnected to said lower end of
said chuck wall on a first end and a central panel on a second end,
said central panel having a central axis that is substantially
parallel to the can body; and a transition zone positioned within
said inwardly oriented arcuate chuck wall which has a geometry
which is distinct from said inwardly oriented arcuate chuck
wall.
21. The end closure of claim 20, wherein said countersink comprises
an inner panel wall and an outer panel wall which are separated by
a distance no greater than about 0.25 inches.
22. The end closure of claim 20, wherein said central panel is
raised no more than 0.090 inches above a lowermost portion of said
countersink.
Description
[0001] This application claims the benefit of U.S. Provisional
Patent Application Ser. No. 60/613,988, filed Sep. 27, 2004, which
is incorporated by reference in its entirety herein.
FIELD OF THE INVENTION
[0002] The present invention generally relates to containers and
container end closures, and more specifically metallic beverage
container end closures adapted for interconnection to a beverage
can body.
BACKGROUND OF THE INVENTION
[0003] Containers and more specifically metallic beverage
containers are typically manufactured by interconnecting a beverage
can end closure on a beverage container body. In some applications,
an end closure may be interconnected on both a top side and a
bottom side of a can body. More frequently, however, a beverage can
end closure is interconnected on a top end of a beverage can body
which is drawn and ironed from a flat sheet of blank material such
as aluminum. Due to the potentially high internal pressures
generated by carbonated beverages, both the beverage can body and
the beverage can end closure are typically required to sustain
internal pressures exceeding 90 psi without catastrophic and
permanent deformation. Further, depending on various environmental
conditions such as heat, over fill, high CO.sub.2 content, and
vibration, the internal pressure in a typical beverage can may at
times exceed 100 psi.
[0004] Thus, beverage can bodies and end closures must be durable
to withstand high internal pressures, yet manufactured with
extremely thin and durable materials such as aluminum to decrease
the overall cost of the manufacturing process and the weight of the
finished product. Accordingly, there exists a significant need for
a durable beverage container end closure which can withstand the
high internal pressures created by carbonated beverages, and the
external forces applied during shipping, yet which is made from
durable, lightweight and extremely thin metallic materials with
geometric configurations which reduce material requirements.
Previous attempts have been made to provide beverage container end
closures with unique geometric configurations to provide material
savings and improve strength, and a commonly used 202 B-64 end
closure is shown in FIG. 11. One example of such an end closure is
described in U.S. Pat. No. 6,065,634 To Crown Cork and Seal
Technology Corporation, entitled "Can End and Method for Fixing the
Same to a Can Body" (hereinafter the '634 patent) and depicted as
prior art in FIG. 12. In the beverage can end described in the '634
patent, a chuck wall is provided which is inclined inwardly toward
a countersink at an angle of between about 40.degree. and
60.degree.. Unfortunately, the beverage container end closure
described in the '634 patent has not proven to be completely
reliable with regard to leaking, and does not utilize standard
double seaming processes which are well known and used in the
industry.
[0005] Other inventions known in the art have attempted to improve
the strength of container end closures and save material costs by
improving the geometry of the countersink region. Examples of these
patents are U.S. Pat. No. 5,685,189 and U.S. Pat. No. 6,460,723 to
Nguyen et al, which are incorporated herein in their entirety by
reference. Another pending application which discloses other
improved end closure geometry is disclosed in pending U.S. patent
application Ser. No. 10/340,535, which was filed on Jan. 10, 2003
and is further incorporated herein in its entirety by
reference.
[0006] The following disclosure describes an improved container end
closure which is adapted for interconnection to a container body
and which has an improved countersink, chuck wall geometry, and
unit depth which significantly saves material costs, yet can
withstand significant internal pressures.
SUMMARY OF THE INVENTION
[0007] Thus, in one aspect of the present invention, a container
end closure is provided which can withstand significant internal
pressures approaching 100 psi, yet saves between 3% and 10% of the
material costs associated with manufacturing a typical beverage can
end closure. Although the invention described herein generally
applies to beverage containers and beverage end closures used to
contain beer, soda and other carbonated beverages, it should be
appreciated by one skilled in the art that the invention may also
be used for any variety of applications which require the use of a
container and interconnected container end closure. In one
embodiment of the present invention, these attributes are achieved
by providing a chuck wall with a substantially concave "arch", and
a predetermined "transition zone" or strengthening bead which is
positioned between the arch and the countersink, and which has a
prominent and defined angle and length.
[0008] In another aspect of the present invention, a container end
closure is provided which is manufactured with conventional
manufacturing equipment and thus generally eliminates the need for
expensive new equipment required to make the beverage can container
end closure. Thus, existing and well known manufacturing equipment
and processes can be implemented to quickly and effectively
initiate the production of an improved beverage can container end
closure in an existing manufacturing facility, i.e., can plant.
[0009] It is another aspect of the present invention to provide an
end closure with an arcuate, non-linear shaped chuck wall, and
which may include at least two distinct radius of curvatures. In
one embodiment, a portion of the lowermost chuck wall is positioned
above the upper chuck wall which has a different radius of
curvature. As used in the prior art, the term "chuck wall"
generally refers to the portion of the end closure located between
the countersink and the circular end wall (or peripheral curl or
flange that forms the double seam with the can body) and which is
contacted by or engaged with the chuck during seaming, as shown in
FIG. 7 of the Crown '634 patent. Unlike the prior art, the seaming
chuck used in seaming the end closures of the present invention
does not necessarily contact or engage with the entire chuck wall
during the forming operation. Rather, to avoid scuffing the end
closure, a portion of the chuck wall may not be contacted by the
chuck drive surface during double seaming of the end closure to the
neck of the container body, but rather only a selected portion of
the chuck wall is engaged with the chuck during rotation and the
double seaming process.
[0010] In another aspect of the present invention, a beverage can
end closure is provided with a countersink having an inner panel
wall with a distinct non-linear, outwardly oriented radius of
curvature of between about 0.025 inches and 0.080 inches. As
referred to herein, the term "outwardly" refers to a direction
oriented generally toward the container neck or sidewalls, while
"inwardly" generally refers to a direction away from the container
neck or sidewalls. Preferably, the curved portion of the inner
panel wall is positioned just below the point of interconnection
with the central panel, and has been shown to improve the strength
of the end closure.
[0011] It is another aspect of the present invention to provide a
beverage can end closure which saves material costs by reducing the
size of the blank material and/or utilizing thinner materials which
have improved aluminum alloy properties. Thus, the integrity and
strength of the beverage can end closure is not compromised, while
material costs are significantly reduced as a result of the blank
reduction, and/or improved aluminum alloy properties provided
therein.
[0012] It is a further aspect of the present invention to provide a
beverage can container end closure with an upper chuck wall having
a first radius of curvature "Rc1" and a lower chuck wall having a
second radius of curvature "Rc2". In another aspect of the present
invention, a "transition zone" may be positioned in either the
upper chuck wall portion, the lower chuck wall portion, or
substantially therebetween. The transition zone is generally a
chuck wall portion with a "kink" or distinctive change in a radius
of curvature over a very specified and generally very short portion
of the chuck wall, and typically with a length no greater than
about 0.005 to 0.010 inches, and preferably about 0.008 inches.
[0013] Alternatively, the upper and lower chuck wall may be
substantially "curvilinear," and thus have such a moderate degree
of curvature that it almost resembles a straight line, i.e.,
linear. Further, the unit depth between an uppermost portion of a
circular end wall and a lowermost portion of the countersink has a
dimension in one embodiment of between about 0.215 and 0.280
inches, and more preferably about 0.250-0.260 inches. Further, in
one aspect of the present invention, the inner panel wall may
additionally have a non-linear radius of curvature, which is
preferably about 0.025-0.080 inches, and more preferably about
0.050 inches.
[0014] It is yet a further aspect of the present invention to
reduce the distance between the inner and outer panel walls of the
countersink, and to thus save material costs while additionally
improving the strength of the end closure. Thus, in one embodiment
of the present invention the distance between the inner and outer
panel walls is between about 0.045 inches and 0.055 inches, and
more preferably about 0.052 inches.
[0015] It is yet another aspect of the present invention to provide
an end closure with a chuck wall with superior strength when
compared to a conventional container end closure, and which can
withstand significant internal pressure. Thus, in one embodiment of
the present invention an end closure is provided with a chuck wall
having an outwardly projecting concave arch, and which in one
embodiment is positioned approximately mid-way between the
countersink and the circular end wall prior to double seaming the
can end to a container body. Preferably, the chuck wall arch has a
radius of curvature between about 0.015 inches and 0.080, and more
preferably less than about 0.040 inches, and must be preferably
about 0.0180-0.025 inches. In one embodiment, the upper chuck wall
and lower chuck wall may be substantially linear, or have only a
gradual radius of curvature, and may include one or more transition
zones positioned therebetween.
[0016] Thus, in one aspect of the present invention, a metallic
container end closure adapted for interconnection to a container
body is provided, and comprises: [0017] a circular end wall adapted
for interconnection to a side wall of the container body; [0018] a
chuck wall integrally interconnected to said circular end wall and
extending downwardly at an angle .theta. as measured from a
vertical plane, said chuck wall further comprising an outwardly
extending arch having a radius of curvature of between about 0.015
and 0.080 inches with a center point positioned below said circular
end wall; [0019] a countersink interconnected to a lower portion of
said chuck wall and having a radius of curvature of less than about
0.020 inches; [0020] a transition zone positioned between a lower
portion of said outwardly extending arch and said countersink
having a length of at least about 0.0090 inches and an angle
distinct from said chuck wall or said countersink. [0021] an inner
panel wall interconnected to said countersink and extending
upwardly at an angle .phi. of between about 0 degrees and 15
degrees as measured from a substantially vertical plane; and [0022]
a central panel interconnected to an upper end of said inner panel
wall and raised above a lowermost portion of said countersink.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIG. 1 is a cross-sectional, front elevation view of one
embodiment of the present invention;
[0024] FIG. 2 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0025] FIG. 3 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0026] FIG. 4 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0027] FIG. 5 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0028] FIG. 6 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0029] FIG. 7 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0030] FIG. 8 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0031] FIG. 9 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0032] FIG. 10 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0033] FIG. 11 is a cross-sectional front elevation view of a
standard 202 diameter beverage can end closure positioned before
double seaming to a beverage can body;
[0034] FIG. 12 is a cross-sectional front elevation view of another
prior art beverage can end positioned before double seaming to a
beverage can body;
[0035] FIG. 13 is a cross sectional front elevation view of another
prior art beverage can end positioned before double seaming to a
beverage can body;
[0036] FIG. 14 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0037] FIG. 15 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0038] FIG. 16 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0039] FIG. 17 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0040] FIG. 18 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention;
[0041] FIG. 19 is a cross-sectional, front elevation view of an
alternative embodiment of the present invention; and
[0042] FIG. 20 is a cross-sectional front elevation view depicting
a plurality of end closures shown in a stacked configuration.
DETAILED DESCRIPTION
[0043] Referring now to the drawings, FIGS. 1-10 represent
alternative embodiments of the present invention, and identifying
various geometries which may be incorporated in a beverage can end
closure 2 to achieve superior performance including buckle
resistance. Each of the geometries shown in FIGS. 1-10 may be
utilized independently, or alternatively combined in one or more
combinations. FIGS. 11-13 represent prior at end closures 2, while
FIGS. 14-19 depict cross-sectional front elevation views of
alternative embodiments of the present invention. FIG. 20 shows a
stacking arrangement of one end closure of the present invention
and identifying the amount of "shuffle," i.e. horizontal movement
in a 2'' vertical stack of end closures. With regard to FIGS. 1-10,
and the geometries provided herein, a detailed chart of these end
closures is provided herein in the specification, wherein the
specific geometry for each end closure is provided as well as
specific performance data. Additionally, the end closures are
provided for comparison purposes.
[0044] Referring now to FIGS. 11-13, prior art end closures which
are currently known in the art are provided herein, and which
generally show the various components of an end closure 2. More
specifically, these include a circular end wall 4 which is
interconnected to a chuck wall 6, which may further be comprised of
an upper chuck wall 8 and a lower chuck wall 10. The lower chuck
wall 10 is generally interconnected to a countersink 12 which
includes a countersink outer panel wall 38 and a countersink inner
panel wall 16. The countersink inner panel wall 16 may be further
comprised of an inner panel wall upper end 18 and an inner panel
wall lower end 20 which may have distinct geometries. The upper end
of the countersink inner panel wall 16 is generally connected to a
central panel 14 which has a substantially vertical center of axis.
The circular end wall 4 of the container end closure is generally
interconnected to a container neck 26 (not shown) which is further
interconnected to a container body 24. As provided herein in the
drawings, the container end closure 2 of any one of the various
embodiments may have a chuck wall radius of curvature Rc, an upper
chuck wall radius of curvature Rc1, a lower chuck wall radius of
curvature Rc2, an upper chuck wall angle .theta., a lower chuck
wall angle .theta..sub.2, an upper inner panel wall angle
.phi..sub.1, and a lower inner panel wall angle .phi..sub.2.
[0045] Referring now to FIG. 1, the cross sectional front elevation
view of one embodiment of the present invention is provided herein,
and which generally depicts a container end closure circular end
wall 4 which has an uppermost portion identified as the crown 22.
Extending inwardly from the crown 22 is a chuck wall 6 which is
comprised of an upper chuck wall 8 and a lower chuck wall 10. The
upper chuck wall 8 further includes a chuck wall arch 30 which is
comprised of an outwardly oriented arcuate portion having a radius
of curvature of about 0.018 inches. Furthermore, the lower chuck
wall portion 10 is comprised of an inwardly oriented arch having a
radius of curvature of about 0.157 inches. The lower chuck wall
portion 10 is further interconnected to a countersink 12 which has
a radius of curvature of about 0.18 inches, and which is further
interconnected to an inner panel wall 16. The inner panel wall has
two radius of curvatures, one on a lower end and one on an upper
end which transitions into the central panel 14. Furthermore, the
countersink has a depth of about 0.090 inches as measured from the
central panel 14, and has a total depth as measured from the crown
22 of about 0.262 inches. Referring now to the test data provided
in Appendix A, the end closure 2 identified in FIG. 1 is shown to
have an ultimate end shell buckle value of 106 psi, which provides
excellent buckle resistance to internal pressures.
[0046] Referring now to FIG. 2, an alternative embodiment of the
present invention is provided herein, and which has a geometry
slightly different than the embodiment shown in FIG. 1. More
specifically, the countersink inner panel wall 16 has a radius of
curvature of about 0.035 inches where the inner panel wall is
interconnected to the central panel. When reviewing the performance
data shown for FIG. 2, it can be seen that the end shell actually
failed at an internal pressure of about 114 psi, which is a
significant improvement over the prior art. The actual dimension of
the end closure shown in FIG. 2, as well as the other embodiments
provided herein are found in Appendix A which includes all of the
performance data as well.
[0047] Referring now to FIGS. 3-10, alternative embodiments of the
present invention are provided herein. One end closure of note is
shown in FIG. 4, which includes a transition zone 40 which is also
depicted in additional detail. More specifically, the transition
zone is generally positioned between an upper chuck wall 8 and a
lower chuck wall 10, and includes a portion with a specific "kink"
or bend which has a distinct radius of curvature as compared to the
upper chuck wall 8 and the lower chuck wall 10. As appreciated by
one skilled in the art, the transition zone or zones may have a
variety of geometries and orientations, another being identified in
FIG. 5, wherein there may be more than one transition zones 40
present in the chuck wall 6.
[0048] Referring now to FIG. 5, an alternative embodiment of the
present invention is provided herein wherein two distinct
transition zones are positioned in the chuck wall between the chuck
wall upper portion and the chuck wall lower portion. As provided in
the detailed views of FIG. 5, each of the transition zones 40
comprise a portion which has a width of approximately 0.008 inches
and a height of 0.008 inches. As appreciated by one skilled in the
art, these dimensions may be greater or lower depending on the
specific chuck wall geometry, and the application related
thereto.
[0049] Referring now to FIG. 6, an alternative embodiment of the
present invention is provided herein wherein the chuck wall has a
substantially linear portion which is interconnected to a lower
portion of the peripheral cover hook at a radius R.sub.C1 which is
in this embodiment approximately 0.018 inches. As appreciated by
one skilled in the art, this radius may vary between about 0.010
inches and 0.040 inches depending on the application for the
beverage container end closure 2.
[0050] Referring now to FIG. 7, an alternative embodiment of the
end closure 2 of the present invention is provided herein. More
specifically, the chuck wall 6 is oriented at an angle of about
45.degree., while the central panel 14 is positioned above the
lower chuck wall 10. More specifically, the central panel 14 is
positioned above a lowermost portion of the countersink 12
preferably about 0.082 inches, and between the range of about 0.050
inches and 0.090 inches. Furthermore, the countersink 12 radius is
between about 0.020 inches and 0.040 inches, and wherein the
countersink inner panel wall 16 is interconnected to the central
panel 14 with a radius of curvature of about 0.025 inches.
Variations of FIG. 7 can be shown in FIGS. 8-9, wherein the
dimensions are slightly different but the general configuration of
the end closure 2 are similar.
[0051] Referring now to FIG. 10, an alternative embodiment of the
present invention is provided herein wherein the chuck wall 6 has a
substantial radius of curvature R.sub.C of approximately 0.147
inches. Furthermore, the upper chuck wall R.sub.C1 has a radius of
curvature of approximately 0.025 inches and which provides a
distinct point of interconnection with the peripheral cover hook 4
to define a radius of curvature of about 0.018 inches. As further
depicted in FIG. 10, the upper chuck wall 8 is positioned above the
radius of curvature interconnecting the upper chuck wall to the
circular end wall 4. As further shown in FIG. 10, the countersink
inner panel wall 16 has an arcuate shape, and wherein the upper
portion has a radius of curvature in this embodiment as 0.035
inches.
[0052] Referring now to FIGS. 11-13, the prior art end closures
provided herein are for reference purposes only and are provided to
shown various prior art end closure designs currently used or
generally known in container beverage industry.
[0053] With regard to FIGS. 14-19, cross-sectional front elevation
views of alternative embodiments of the present invention are
provided herein, and which show variations in the chuck wall arch
30, and the transition zones 40.
[0054] Referring now to FIG. 20, the cross-sectional front
elevation view is shown of the stacking of one embodiment of the
present invention, and which identifies the shuffle, i.e.,
horizontal travel of a 2'' height of end closures. As shown herein,
with a vertical height of 1.8640 inches, the horizontal movement is
0.2352 inches.
[0055] The end closures provided herein in the drawings are
generally drawn and ironed from a substantial planar piece of
metal, commonly aluminum, and formed into the distinct shapes with
the geometry shown herein. As appreciated by one skilled in the
art, the presses and dies used to form these end closures are
commonly known in the art and generally provide support on various
portions of an outer surface and inner surface of the end closure
to create a preferred geometry. In some embodiments a "free
forming" method of double seaming may be employed as disclosed in
pending U.S. patent application Ser. No. 11/192,978, which is
incorporated herein in its entirety by reference.
[0056] The geometry and performance data for each of the end
closures provided in FIGS. 1-10 are provided herein, and include
pressure testing with the end closure double seamed to a
container.
Test Data for End Shells Seamed on Cans
[0057] TABLE-US-00001 Aluminum Alloy 5182 Metal Gauge 0.0082''
Outside Diameter 2.342'' Unit Depth 0.262'' Panel Depth 0.090''
Panel Diameter 1.640 W Curl Height 0.081'' Countersink Radius
0.020'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.025''
Inner Countersink Radius 0.025'' Circumferential Chuck wall Dome
Radius 0.157''
[0058] Note: End Shell Buckle and Ultimate Failure was at 106 psi.
Center Panel Bulge Values Pressure in psi psi Center Panel
Deflection TABLE-US-00002 psi Center Panel Deflection 40 lbs
0.015'' 50 lbs 0.021'' 60 lbs 0.038'' 70 lbs 0.053'' 80 lbs 0.059''
90 lbs 0.072'' 100 lbs 0.079''
Test Data for End Shell Version #2
[0059] TABLE-US-00003 Aluminum Alloy 5182 Metal Gauge 0.0080''
Outside Diameter 2.342'' Unit Depth 0.262'' Panel Depth 0.090''
Panel Diameter 1.640'' Curl Height 0.081'' Countersink Radius
0.020'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.025''
Inner Countersink Radius 0.025'' Inner panel wall Dome Radius
0.035'' Circumferential Dome Radius 0.157''
Performance Criteria--Center Panel Bulge Values Pressure in LBS.
Rise
[0060] TABLE-US-00004 psi Center Panel Deflection 40 lbs 0.017'' 50
lbs 0.024'' 60 lbs 0.041'' 70 lbs 0.056'' 80 lbs 0.064'' 90 lbs
0.079'' 100 lbs 0.083''
Note: End shell buckle and ultimate failure at 114 psi.
Circumferential Dome Annulus End Shell Version #3
[0061] TABLE-US-00005 Aluminum Alloy 5182 Metal Gauge 0.0078''
Outside Diameter 2.342'' Unit Depth 0.255'' Panel Depth 0.082''
Panel Diameter 1.640'' Curl Height 0.081'' Countersink Radius
0.015'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.022''
Inner Countersink Radius 0.020'' Inner panel wall Dome Radius
0.035'' Circumferential Dome Radius 0.152''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0062] TABLE-US-00006 psi Center Panel Deflection 40 lbs 0.0185''
50 lbs 0.027'' 60 lbs 0.046'' 70 lbs 0.067'' 80 lbs 0.072'' 90 lbs
0.084'' 100 lbs X
Note: End Shell Buckle and Ultimate Failure was at 93 psi.
Circumferential Dome Annulus End Shell Version #4
[0063] TABLE-US-00007 Aluminum Alloy 5182 Metal Gauge 0.0078''
Outside Diameter 2.342'' Unit Depth 0.255'' Panel Depth 0.082''
Panel Diameter 1.640 W Curl Height 0.081'' Countersink Radius
0.015'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.022''
Inner Countersink Radius 0.020'' Inner panel wall Dome Radius
0.035'' Circumferential Dome Radius 0.152''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0064] TABLE-US-00008 psi Center Panel Deflection 40 lbs 0.016'' 50
lbs 0.024'' 60 lbs 0.038'' 70 lbs 0.059'' 80 lbs 0.071'' 90 lbs
0.086'' 100 lbs X
End shell buckle Pressure (Failure) Fully Aged End Shell=97
lbs.
Circumferential Dome Annulus End Shell Version #5
[0065] TABLE-US-00009 Aluminum Alloy 5182 Metal Gauge 0.0078''
Outside Diameter 2.342'' Unit Depth 0.255'' Panel Depth 0.082''
Panel Diameter 1.640'' Curl Height 0.081'' Countersink Radius
0.015'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.022''
Inner Countersink Radius 0.020'' Inner panel well Dome Radius
0.035'' Circumferential Dome Radius 0.152''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0066] TABLE-US-00010 psi Center Panel Deflection 40 lbs 0.0145''
50 lbs 0.022'' 60 lbs 0.035'' 70 lbs 0.054'' 80 lbs 0.066'' 90 lbs
0.082'' 100 lbs 0.089''
End shell buckle Pressure (Failure) Fully Aged=102 lbs.
Flat Angle Annulus (Chuck Panel) End Shell Version #6
[0067] TABLE-US-00011 Aluminum Alloy 5182 Metal Gauge 0.0082''
Outside Diameter 2.342'' Unit Depth 0.270'' Panel Depth 0.090''
Panel Diameter 1.640 W Curl Height 0.081'' Countersink Radius
0.020'' Chuck Panel Angle 45 degrees Chuck Wall Angle 14 degrees
Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.025'' Inner
Countersink Radius 0.025'' Depth of Outer Panel wall 0.065''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0068] TABLE-US-00012 psi Center Panel Deflection 40 lbs 0.0265''
50 lbs 0.0435'' 60 lbs 0.0565'' 70 lbs 0.0645'' 80 lbs 0.0756'' 90
lbs 0.0825''
End Shell Buckle and Ultimate Failure=93 lbs.
Flat Angle Annulus (Chuck Panel) End Shell Version #7
[0069] TABLE-US-00013 Aluminum Alloy 5182 Metal Gauge 0.0082''
Outside Diameter 2.342'' Unit Depth 0.262'' Panel Depth 0.082''
Panel Diameter 1.640 W Curl Height 0.081'' Countersink Radius
0.020'' Chuck Panel Angle 45 degrees Chuck Wall Angle 14 degrees
Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.025'' Inner
Countersink Radius 0.025'' Depth of Outer Panel Wall 0.065
Performance Criteria Center Panel Bulge Values Pressure in psi
[0070] TABLE-US-00014 psi Center Panel Deflection 40 lbs 0.0314''
50 lbs 0.0485'' 60 lbs 0.0635'' 70 lbs 0.0780'' 80 lbs 0.0825'' 90
lbs X
End Shell Buckle and Ultimate Failure 87 lbs.
Flat Angle Annulus (Chuck Panel) End Shell Version #8
[0071] TABLE-US-00015 Aluminum Alloy 5182 Metal Gauge 0.0082''
Outside Diameter 2.342'' Unit Depth 0.255'' Panel Depth 0.080''
Panel Diameter 1.640'' Curl Height 0.081'' Countersink Radius
0.015'' Chuck Panel Angle 45 Degrees Chuck Wall Angle 14 Degrees
Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.025'' Inner
Countersink Radius 0.020'' Depth of Outer Panel Wall 0.065''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0072] TABLE-US-00016 psi Center Panel Deflection 40 lbs 0.0370''
50 lbs 0.0510'' 60 lbs 0.0710'' 70 lbs 0.0815'' 80 lbs 0.0885'' 90
lbs X
End Shell Buckle and Ultimate Failure=82 lbs.
Flat Angle Annulus (Chuck Panel) End Shell Version #9
[0073] TABLE-US-00017 Aluminum Alloy 5182 Metal Gauge 0.0082''
Outside Diameter 2.342'' Unit Depth 0.260'' Panel Depth 0.082''
Panel Diameter 1.640 W Curl Height 0.081'' Countersink Radius
0.020'' Chuck Panel Angle 45 Degrees Chuck Wall Angle 14 degrees
Depth of Chuck Wall 0.091 Inner Panel Wall Radius 0.025'' Inner
Countersink Radius 0.020'' Depth of Outer Panel Wall 0.065''
Performance Criteria Center Panel Bulge Values Pressure in psi
[0074] TABLE-US-00018 psi Center Panel Deflection 40 lbs 0.0275''
50 lbs 0.0445'' 60 lbs 0.0635'' 70 lbs 0.0740'' 80 lbs 0.0820'' 90
lbs X
End Shell Buckle and Ultimate Failure=93 lbs.
Circumferential Domed End Shell Version #10
[0075] TABLE-US-00019 Aluminum Alloy 5182 Metal Gauge 0.0076''
Outside Diameter 2.342'' Unit Depth 0.255'' Panel Depth 0.076''
Panel Diameter 1.640'' Curl Height 0.081'' Countersink Radius
0.015'' Chuck Wall Intersection Radius 0.018'' Chuck Wall Angle 14
degrees Depth of Chuck Wall 0.091'' Inner Panel Wall Radius 0.022''
Inner Countersink Radius 0.020'' Inner panel wall Dome Radius
0.035'' Circumferential Dome Radius 0.147'' Depth From Top of End
Shell to 0.076'' Raised Outer Dome
Performance Criteria Center Panel Bulge Values Pressure in psi
[0076] TABLE-US-00020 psi Center Panel Deflection 40 lbs 0.012'' 50
lbs 0.018'' 60 lbs 0.028'' 70 lbs 0.036'' 80 lbs 0.048'' 90 lbs
0.058'' 100 lbs 0.063'' Ultimate Failure 103 lbs
[0077] For clarity, the following list of components and associated
numbering found in the drawings are provided herein: TABLE-US-00021
No. Components 2 Container end closure 4 Circular end wall 6 Chuck
wall 8 Upper chuck wall 10 Lower chuck wall 12 Countersink 14
Central panel 16 Inner panel wall 18 Inner panel wall upper end 20
Inner panel wall lower end 22 Crown 24 Container body 26 Container
neck 28 Seaming chuck 30 Chuck wall arch 32 Double seam 34 Seaming
chuck linear wall portion 36 Seaming chuck arcuate wall portion 38
Countersink outer panel wall 40 Transition zone Rc Chuck wall arch
radius of curvature Rc1 Upper chuck wall radius of curvature Rc2
Lower chuck wall radius of curvature .theta..sub.1 Upper chuck wall
angle .theta..sub.2 Lower chuck wall angle .phi..sub.1 Upper inner
panel wall angle .phi..sub.2 Lower inner panel wall angle
[0078] The foregoing description of the present invention has been
presented for purposes of illustration and description.
Furthermore, the description is not intended to limit the invention
to the form disclosed herein. Consequently, variations and
modifications commenced here with the above teachings and the skill
or knowledge of the relevant art are within the scope in the
present invention. The embodiments described herein above are
further extended to explain best modes known for practicing the
invention and to enable others skilled in the art to utilize the
invention in such, or other, embodiments or various modifications
required by the particular applications or uses of present
invention. It is intended that the dependent claims be construed to
include all possible embodiments to the extent permitted by the
prior art.
* * * * *