CA2341197C - Can end having a strengthened side wall and apparatus and method of making same - Google Patents
Can end having a strengthened side wall and apparatus and method of making same Download PDFInfo
- Publication number
- CA2341197C CA2341197C CA002341197A CA2341197A CA2341197C CA 2341197 C CA2341197 C CA 2341197C CA 002341197 A CA002341197 A CA 002341197A CA 2341197 A CA2341197 A CA 2341197A CA 2341197 C CA2341197 C CA 2341197C
- Authority
- CA
- Canada
- Prior art keywords
- angle
- chuck
- side wall
- wall
- central axis
- 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
-
- 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
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
- B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
- B65D7/36—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by rolling, or by rolling and pressing
-
- 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
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53709—Overedge assembling means
Abstract
A method and apparatus for seaming a can end to a can body and a can made thereby. The can end has a side wall forming an angle in the range of about 12.degree. to 15.degree.. A seaming chuck (42) is inserted into the can end adjacent its side wall. The seaming chuck (42) has upper and lower walls. The upper wall is essentially cylindrical or slightly negatively tapered. The lower wall is disposed at an angle very close to that of the can end side wall so that the upper and lower chuck side walls form an obtuse angle in the range of about 162.degree. to 168.degree.. A can seamed using such a chuck will have a segmented, kinked side wall comprising upper and lower substantially straight sections intersecting at a circumferentially extending crease and forming an obtuse angle.
Description
CAN END HAVING A STRENGTHENED SIDE WALL
AND APPARATUS AND METHOD OF MAKING SAME
Field of the Invention The current invention is directed to a can, such as a metal can used to package carbonated beverages. More specifically, the current invention is directed to a can having an end with improved strength, and to an apparatus and method for making such a can.
Background of the Invention Beverages, such as carbonated beverages, are typically packaged in cans made of metal, such as aluminum. Two piece cans are typically formed by seaming a can end to a can body. Traditionally, seaming is accomplished by forming a can end 10, shown in Figure 1, in a die press. The can end 10 typically has a circular countersink bead 16, a substantially flat center panel 18, a seaming panel 13 that terminates in a peripheral curl 12, and a frustoconical side wall portion 14 that extends between the bead and the seaming panel. Traditionally, the side wall 14 is disposed at an angle A of about 14 with respect to a line parallel to the centerline 7 of the can body 20. (Unless otherwise indicated, the numerical value of all angles referred to herein should be understood to be positive, meaning that the angle tapers away from the centerline of the can body as it extends upward in the direction from the bottom of the can body toward the can end. A negative angle is an angle that extends toward the ~ruckexem.;.iar centerline as it extends upward in the direction from the bottom of the can body toward the can end.) Seaming is performed by disposing a flange 11 of the can body 20 under the seaming panel 13 on the can end 10. A seaming chuck 2 is then inserted into the can end 10, as shown in Figure 1. Traditionally, seaming chucks 2 have frustoconical upper and lower wall portions 4 and 6, respectively. The lower wall portion 6 is typically disposed at an angle B that is a few degrees less than the angle A of the can end side wall 14 so that if the angle A of the can end side wall were about 14 , the angle B of the chuck lower wall would be about 11 . The upper wall portion 4, which typically has a length L
of about 3.3 mm, is typically disposed at an angle C that is about 4 . Thus, the upper and lower wall portions 4 and 6 intersect at an edge 5 so as to form an obtuse angle of about 173 (i. e. , 180 + 4 - 11 ). Typically, the edge 5 has a radius of curvature of about 0.13 mm.
Since the angle B of the lower wall 6 of the chuck 2 is less than the angle A
of the can end lower wall 14, a relatively large gap, which may be as much as 0.25 mm, is formed between the chuck side wall and the can end side wall in the vicinity of the chuck wall edge 5, as shown in Figure 1.
Seaming is completed by sequentially applying first and second seaming rolls against the curl 12 so as to press the curl and the flange 11 against the upper chuck wall 4, thereby producing a standard double seam 22, shown in Figure 2.
Unfortunately, although pressed against the chuck 2 during seaming, the side wall 14 of the can end tends to spring back - that is, radially outward --when the pressure of the seaming roll is relieved. Thus, despite the fact that the upper and lower walls 4 and 6 of conventional seaming chucks 2 form two straight, frustoconical sections, the resulting side wall 14' of the can end 10' after seaming is arcuate, having a relatively large radius of curvature Rl, as shown in Figure 2. The curved nature of the seamed side wall 14' weakens the strength of the seamed can end 10'.
Recently, a non-standard can end has been developed in which the side wall, after seaming, is formed by two straight sections intersecting at a circumferentially extending crease. Such a can end is shown in published PCT application WO
96/37414.
This structure is achieved by initially forming the can end side wall at a large angle that is said to be preferably in the range of 40 to 45 . According to the approach described AMENDED SHEET
AND APPARATUS AND METHOD OF MAKING SAME
Field of the Invention The current invention is directed to a can, such as a metal can used to package carbonated beverages. More specifically, the current invention is directed to a can having an end with improved strength, and to an apparatus and method for making such a can.
Background of the Invention Beverages, such as carbonated beverages, are typically packaged in cans made of metal, such as aluminum. Two piece cans are typically formed by seaming a can end to a can body. Traditionally, seaming is accomplished by forming a can end 10, shown in Figure 1, in a die press. The can end 10 typically has a circular countersink bead 16, a substantially flat center panel 18, a seaming panel 13 that terminates in a peripheral curl 12, and a frustoconical side wall portion 14 that extends between the bead and the seaming panel. Traditionally, the side wall 14 is disposed at an angle A of about 14 with respect to a line parallel to the centerline 7 of the can body 20. (Unless otherwise indicated, the numerical value of all angles referred to herein should be understood to be positive, meaning that the angle tapers away from the centerline of the can body as it extends upward in the direction from the bottom of the can body toward the can end. A negative angle is an angle that extends toward the ~ruckexem.;.iar centerline as it extends upward in the direction from the bottom of the can body toward the can end.) Seaming is performed by disposing a flange 11 of the can body 20 under the seaming panel 13 on the can end 10. A seaming chuck 2 is then inserted into the can end 10, as shown in Figure 1. Traditionally, seaming chucks 2 have frustoconical upper and lower wall portions 4 and 6, respectively. The lower wall portion 6 is typically disposed at an angle B that is a few degrees less than the angle A of the can end side wall 14 so that if the angle A of the can end side wall were about 14 , the angle B of the chuck lower wall would be about 11 . The upper wall portion 4, which typically has a length L
of about 3.3 mm, is typically disposed at an angle C that is about 4 . Thus, the upper and lower wall portions 4 and 6 intersect at an edge 5 so as to form an obtuse angle of about 173 (i. e. , 180 + 4 - 11 ). Typically, the edge 5 has a radius of curvature of about 0.13 mm.
Since the angle B of the lower wall 6 of the chuck 2 is less than the angle A
of the can end lower wall 14, a relatively large gap, which may be as much as 0.25 mm, is formed between the chuck side wall and the can end side wall in the vicinity of the chuck wall edge 5, as shown in Figure 1.
Seaming is completed by sequentially applying first and second seaming rolls against the curl 12 so as to press the curl and the flange 11 against the upper chuck wall 4, thereby producing a standard double seam 22, shown in Figure 2.
Unfortunately, although pressed against the chuck 2 during seaming, the side wall 14 of the can end tends to spring back - that is, radially outward --when the pressure of the seaming roll is relieved. Thus, despite the fact that the upper and lower walls 4 and 6 of conventional seaming chucks 2 form two straight, frustoconical sections, the resulting side wall 14' of the can end 10' after seaming is arcuate, having a relatively large radius of curvature Rl, as shown in Figure 2. The curved nature of the seamed side wall 14' weakens the strength of the seamed can end 10'.
Recently, a non-standard can end has been developed in which the side wall, after seaming, is formed by two straight sections intersecting at a circumferentially extending crease. Such a can end is shown in published PCT application WO
96/37414.
This structure is achieved by initially forming the can end side wall at a large angle that is said to be preferably in the range of 40 to 45 . According to the approach described AMENDED SHEET
in this published PCT application, the seaming chuck has a lower wall disposed at a similarly large angle and an upper wall disposed at an angle in the range of +4 to -4 .
While this approach results in a strengthened can end, unfortunately, the large can end side wall angle required in this approach precludes its application to standard can ends, in which the side wall angle is only about 14 , as previously discussed.
Consequently, it would be desirable to provide a method and apparatus for seaming a conventional end to a can such that the resulting seamed can end had a side wall of improved strength.
Summary of the Invention It is an object of the current invention to provide a method and apparatus for seaming a conventional end to a can such that the resulting seamed can end had a side wall of improved strength. This and other objects is accomplished in a method of seaming a can end to a can body comprising the steps of (i) forming a can end having a side wall and a seaming panel, the side wall formed by a single substantially straight section disposed at an angle with respect to the central axis that is within the range of about 12 to 15 ,(ii) inserting a chuck into the can end adjacent the side wall, the chuck having upper and lower portions forming upper and lower chuck walls, the lower chuck wall being substantially frustoconical and disposed at an angle with respect to the central axis that is no less than the angle at which the substantially straight section of the can end side wall is disposed with respect to the central axis, the upper chuck wall disposed at an angle with respect to the central axis that is within the range of about 0 to -2 , and (iii) seaming the seaming panel of the can end to a can body so as to reshape the can end side wall into upper and lower substantially straight sections, the upper and lower substantially straight sections intersecting at an obtuse angle.
The current invention also encompasses a chuck for use in seaming a can end to a can body, comprising (i) an upper portion forming an upper wall, the upper wall being disposed at an angle with respect to the central axis that is within the range of about 0 to -2 , and (ii) a lower portion forming a lower wall, the lower wall being substantially frustoconical and disposed at an angle with respect to the upper wall that is within the range of about 162 to 168 .
While this approach results in a strengthened can end, unfortunately, the large can end side wall angle required in this approach precludes its application to standard can ends, in which the side wall angle is only about 14 , as previously discussed.
Consequently, it would be desirable to provide a method and apparatus for seaming a conventional end to a can such that the resulting seamed can end had a side wall of improved strength.
Summary of the Invention It is an object of the current invention to provide a method and apparatus for seaming a conventional end to a can such that the resulting seamed can end had a side wall of improved strength. This and other objects is accomplished in a method of seaming a can end to a can body comprising the steps of (i) forming a can end having a side wall and a seaming panel, the side wall formed by a single substantially straight section disposed at an angle with respect to the central axis that is within the range of about 12 to 15 ,(ii) inserting a chuck into the can end adjacent the side wall, the chuck having upper and lower portions forming upper and lower chuck walls, the lower chuck wall being substantially frustoconical and disposed at an angle with respect to the central axis that is no less than the angle at which the substantially straight section of the can end side wall is disposed with respect to the central axis, the upper chuck wall disposed at an angle with respect to the central axis that is within the range of about 0 to -2 , and (iii) seaming the seaming panel of the can end to a can body so as to reshape the can end side wall into upper and lower substantially straight sections, the upper and lower substantially straight sections intersecting at an obtuse angle.
The current invention also encompasses a chuck for use in seaming a can end to a can body, comprising (i) an upper portion forming an upper wall, the upper wall being disposed at an angle with respect to the central axis that is within the range of about 0 to -2 , and (ii) a lower portion forming a lower wall, the lower wall being substantially frustoconical and disposed at an angle with respect to the upper wall that is within the range of about 162 to 168 .
The current invention also encompasses a seamed can comprising (i) a can body defining a central axis thereof, and (ii) a can end seamed to the can body, the can end having a side wall formed by upper and lower substantially straight sections, the lower substantially straight section disposed at an angle with respect to the central axis that is in the range of about 12 to 15 , the upper and lower substantially straight sections intersecting at an obtuse angle so as to form a circular crease separating the upper and lower substantially straight sections.
According to one aspect of the present invention, there is provided a method of seaming a can end to a can body, said can body defining a central axis thereof, comprising the steps of: a) forming a can end having a side wall and a peripheral seaming panel, said side wall formed by a single substantially straight section disposed at an angle A with respect to said central axis; b) inserting a chuck into said can end adjacent said side wall, said chuck having upper and lower portions forming upper and lower chuck walls, said lower chuck wall being substantially frustoconical and disposed at an angle B; and c) seaming said seaming panel of said can end to a can body so as to reshape said can end side wall into a segmented side wall comprised of upper and lower substantially straight sections, said upper and lower substantially straight sections intersecting at an obtuse angle F; wherein said angle A with respect to said central axis is substantially within the range of 12 to 15 , said angle B with respect to said central axis is no less than said angle A, and said upper chuck wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 .
-4a-According to another aspect of the present invention, there is provided a chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis substantially in the range of 12 to 15 , comprising: a) an upper portion forming an upper wall; b) a lower portion forming a lower wall, said lower wall being substantially frustoconical; and wherein said upper wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 , and said frustoconical lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162 to 168 and is disposed at an angle B' with respect to said central axis that is not substantially greater than 16 .
According to still another aspect of the present invention, there is provided a chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis, comprising: a) an upper portion forming an upper wall; and b) a lower portion forming a lower wall, said lower wall being substantially frustoconical and disposed at an angle B with respect to said central axis; and wherein said upper wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 , said angle B with respect to said central axis is not less than said angle A and is not substantially greater than 16 , and said lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162 to 168 .
According to yet another aspect of the present invention, there is provided a can comprising: a) a can -4b-body defining a central axis thereof; and b) a can end, said can end having a peripheral edge forming a seam in conjunction with said can body that attaches said can end to said can body, said can end having a side wall formed by upper and lower substantially straight sections, said lower substantially straight section being frustoconical and disposed at an angle A with respect to said central axis, said upper and lower substantially straight sections intersecting at an obtuse angle F so as to form a circumferentially extending crease separating said upper and lower substantially straight sections; and wherein said angle A is substantially in the range of 12 to 15 .
Brief Description of the Drawings Figure 1 is a cross-sectional view of a can end and can body prior to seaming but after the insertion of a seaming chuck into the can end, according to the prior art.
Figure 2 is a cross-sectional view of the can end shown in Figure 1 after seaming, according to the prior art.
Figure 3 is a cross-sectional view of a can end and can body prior to seaming but after the insertion of a seaming chuck into the can end, according to the current invention.
Figure 4 is a cross-sectional view showing the can end shown in Figure 3 being seamed according to the current invention.
Figure 5 is a cross-sectional view of the can end of the current invention after seaming.
Figure 6 is a cross-sectional detailed view of a portion of the chuck shown in Figures 3 and 4, according to the current invention.
According to one aspect of the present invention, there is provided a method of seaming a can end to a can body, said can body defining a central axis thereof, comprising the steps of: a) forming a can end having a side wall and a peripheral seaming panel, said side wall formed by a single substantially straight section disposed at an angle A with respect to said central axis; b) inserting a chuck into said can end adjacent said side wall, said chuck having upper and lower portions forming upper and lower chuck walls, said lower chuck wall being substantially frustoconical and disposed at an angle B; and c) seaming said seaming panel of said can end to a can body so as to reshape said can end side wall into a segmented side wall comprised of upper and lower substantially straight sections, said upper and lower substantially straight sections intersecting at an obtuse angle F; wherein said angle A with respect to said central axis is substantially within the range of 12 to 15 , said angle B with respect to said central axis is no less than said angle A, and said upper chuck wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 .
-4a-According to another aspect of the present invention, there is provided a chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis substantially in the range of 12 to 15 , comprising: a) an upper portion forming an upper wall; b) a lower portion forming a lower wall, said lower wall being substantially frustoconical; and wherein said upper wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 , and said frustoconical lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162 to 168 and is disposed at an angle B' with respect to said central axis that is not substantially greater than 16 .
According to still another aspect of the present invention, there is provided a chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis, comprising: a) an upper portion forming an upper wall; and b) a lower portion forming a lower wall, said lower wall being substantially frustoconical and disposed at an angle B with respect to said central axis; and wherein said upper wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0 to -2 , said angle B with respect to said central axis is not less than said angle A and is not substantially greater than 16 , and said lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162 to 168 .
According to yet another aspect of the present invention, there is provided a can comprising: a) a can -4b-body defining a central axis thereof; and b) a can end, said can end having a peripheral edge forming a seam in conjunction with said can body that attaches said can end to said can body, said can end having a side wall formed by upper and lower substantially straight sections, said lower substantially straight section being frustoconical and disposed at an angle A with respect to said central axis, said upper and lower substantially straight sections intersecting at an obtuse angle F so as to form a circumferentially extending crease separating said upper and lower substantially straight sections; and wherein said angle A is substantially in the range of 12 to 15 .
Brief Description of the Drawings Figure 1 is a cross-sectional view of a can end and can body prior to seaming but after the insertion of a seaming chuck into the can end, according to the prior art.
Figure 2 is a cross-sectional view of the can end shown in Figure 1 after seaming, according to the prior art.
Figure 3 is a cross-sectional view of a can end and can body prior to seaming but after the insertion of a seaming chuck into the can end, according to the current invention.
Figure 4 is a cross-sectional view showing the can end shown in Figure 3 being seamed according to the current invention.
Figure 5 is a cross-sectional view of the can end of the current invention after seaming.
Figure 6 is a cross-sectional detailed view of a portion of the chuck shown in Figures 3 and 4, according to the current invention.
Description of the Preferred Embodiment A novel method of seaming a conventional can end 10 to a conventional can body 20 according to the current invention is shown in Figures 3 and 4. As previously discussed, the can end 10 is typically made from metal, such as aluminum, and formed in a die press using techniques well known in the art. The can body 20 is also made from a metal, such as aluminum, and may be formed in a drawing and ironing process, again, using techniques well known in the art. As is also conventional, the frustoconical side wall 14 of the can end 10, which extends between the bead 16 and the seaming panel 13, is disposed at an angle A with respect to a line 7 parallel to the central longitudinal axis of the can body 20 that is in the range of about 12 to 15 , and preferably about 14 .
Prior to seaming, the flange 11 of the can body 20 is placed under the seaming panel 13 formed adjacent the can end side wall 14. A seaming chuck 42, constructed according to the current invention and discussed further below, is then inserted into the can end 10 adjacent the side wall 14 so that the distal end of the chuck enters the bead 16. The seaming chuck 42 has un upper wall 44 and a lower wal146 that intersect at a circumferentially extending edge 45.
According to the current invention, the lower wall 46 of the chuck 42 is disposed at an angle B' with respect to a line 7 parallel to the central axis of the can body, which coincides with the central axis of the chuck, that is very close to the angle A of the can end side wall 14. Specifically, the angle B' should be no less than, and most preferably slightly greater than, the angle A. Thus, when the angle A of the can end side wall 14 is disposed at the preferred angle of about 14 , the angle B' of the chuck lower wall 46 should be within the range of about 14 to 15 . In general, the angle B' of the lower chuck wall 14 according to the invention should be in the range of about A to A + 1 (since standard can ends have side wall angles in about the 12 to 15 range, as previously discussed, chucks 42 according to the current invention will have lower wall angles in about the 12 to 16 range). As a result of this relationship between the can end and chuck wall angles according to the current invention, there is little or no gap between the edge 45 of the chuck side wall and the can end side wall 14, as shown in Figure 3, when the chuck 42 is inserted into the can end 10. In fact, preferably, there is a slight interference between the edge 45 of the chuck wall and the side wall 14 of the can end when the chuck 42 is fully inserted into the bead 16.
According to the current invention, the upper wall 44 of the chuck 42 is cylindrical or slightly negatively tapered, being disposed at an angle C' with respect to a line 7 parallel to the central axis that is within the range of about 0 0 to -2 , and is preferably about -1 . Thus, chucks 42 made in accordance with the current invention will have upper and lower walls 44 and 46 that intersect at an obtuse angle D' in the range of about 162 (i. e. , 180 - 2 - 16 ) to 168 (i. e. , 180 - 0 - 12 ) depending on the angle A
of the can end side wall 14 to be seamed. Preferably the upper and lower walls 44 and 46 intersect at an obtuse angle of about 165 (i. e. , 180 - 1 - 14 ) if the can end side wall 14 is formed at the preferred angle of about 14 . Significantly, this angle D' is less than the approximately 173 angle D traditionally associated with seaming chucks 2 for conventional can ends 10, discussed above. As shown in Figure 6, preferably, a radius R' in the range of about 0.025 to 0.51 mm, and preferably about 0.25 mm, is formed on the edge 45. Moreover, the upper wall 44 of the chuck 42 has a length L', indicated in Figure 3, of approximately 2.5 mm.
As is conventional, seaming is accomplished by sequentially applying a series of rotating seaming rolls 60, one of which is shown in Figure 4, to the curl 12 so that the forming surface 63 of the roll 60 presses the curl and flange 11 against the upper wall 44 of the chuck 42, thereby forming a double seam 62.
Employing the seaming chuck 42 of the current invention results in a seamed can end 10" such as that shown in Figure 5. In contrast to arcuate side wall 14' of a conventionally seamed can end 10, such as that shown in Figure 2, the side wall 14" of the can end 10" seamed according to the current invention is segmented. As shown in Figure 5, the can end side wall is comprised of a substantially straight upper segment 66 and a substantially straight, frustoconical lower segment 68. The upper and lower segments 66 and 68 intersect at a circumferentially extending crease or kink 69. The substantially straight upper segment 66 extends from the seam 62 to the crease 69, and the substantially straight, frustoconical lower segment 68 extends from the crease to the bead 16.
AARENDED
~l:~cT
Prior to seaming, the flange 11 of the can body 20 is placed under the seaming panel 13 formed adjacent the can end side wall 14. A seaming chuck 42, constructed according to the current invention and discussed further below, is then inserted into the can end 10 adjacent the side wall 14 so that the distal end of the chuck enters the bead 16. The seaming chuck 42 has un upper wall 44 and a lower wal146 that intersect at a circumferentially extending edge 45.
According to the current invention, the lower wall 46 of the chuck 42 is disposed at an angle B' with respect to a line 7 parallel to the central axis of the can body, which coincides with the central axis of the chuck, that is very close to the angle A of the can end side wall 14. Specifically, the angle B' should be no less than, and most preferably slightly greater than, the angle A. Thus, when the angle A of the can end side wall 14 is disposed at the preferred angle of about 14 , the angle B' of the chuck lower wall 46 should be within the range of about 14 to 15 . In general, the angle B' of the lower chuck wall 14 according to the invention should be in the range of about A to A + 1 (since standard can ends have side wall angles in about the 12 to 15 range, as previously discussed, chucks 42 according to the current invention will have lower wall angles in about the 12 to 16 range). As a result of this relationship between the can end and chuck wall angles according to the current invention, there is little or no gap between the edge 45 of the chuck side wall and the can end side wall 14, as shown in Figure 3, when the chuck 42 is inserted into the can end 10. In fact, preferably, there is a slight interference between the edge 45 of the chuck wall and the side wall 14 of the can end when the chuck 42 is fully inserted into the bead 16.
According to the current invention, the upper wall 44 of the chuck 42 is cylindrical or slightly negatively tapered, being disposed at an angle C' with respect to a line 7 parallel to the central axis that is within the range of about 0 0 to -2 , and is preferably about -1 . Thus, chucks 42 made in accordance with the current invention will have upper and lower walls 44 and 46 that intersect at an obtuse angle D' in the range of about 162 (i. e. , 180 - 2 - 16 ) to 168 (i. e. , 180 - 0 - 12 ) depending on the angle A
of the can end side wall 14 to be seamed. Preferably the upper and lower walls 44 and 46 intersect at an obtuse angle of about 165 (i. e. , 180 - 1 - 14 ) if the can end side wall 14 is formed at the preferred angle of about 14 . Significantly, this angle D' is less than the approximately 173 angle D traditionally associated with seaming chucks 2 for conventional can ends 10, discussed above. As shown in Figure 6, preferably, a radius R' in the range of about 0.025 to 0.51 mm, and preferably about 0.25 mm, is formed on the edge 45. Moreover, the upper wall 44 of the chuck 42 has a length L', indicated in Figure 3, of approximately 2.5 mm.
As is conventional, seaming is accomplished by sequentially applying a series of rotating seaming rolls 60, one of which is shown in Figure 4, to the curl 12 so that the forming surface 63 of the roll 60 presses the curl and flange 11 against the upper wall 44 of the chuck 42, thereby forming a double seam 62.
Employing the seaming chuck 42 of the current invention results in a seamed can end 10" such as that shown in Figure 5. In contrast to arcuate side wall 14' of a conventionally seamed can end 10, such as that shown in Figure 2, the side wall 14" of the can end 10" seamed according to the current invention is segmented. As shown in Figure 5, the can end side wall is comprised of a substantially straight upper segment 66 and a substantially straight, frustoconical lower segment 68. The upper and lower segments 66 and 68 intersect at a circumferentially extending crease or kink 69. The substantially straight upper segment 66 extends from the seam 62 to the crease 69, and the substantially straight, frustoconical lower segment 68 extends from the crease to the bead 16.
AARENDED
~l:~cT
The angle A of the can end lower wall 68 with respect to a line 7 parallel to the central axis will generally remain essentially unchanged as a result of seaming according to the current invention, being in the range of about 12 to 15 , and preferably being about 14 , as previously discussed. Although pressed firmly against the chuck upper wall 44 during seaming, after seaming, the can end upper side wall 66 will spring back -- that is, radially outward -- slightly. Consequently, the angle E of the can end upper side wall 66 with respect to a line 7 parallel to the central axis will generally be in the range of about 0 to 2 . Thus, in can ends seamed according to the current invention, the obtuse angle F at which the upper and lower side walls 66 and 68 intersect will generally be in the range of about (180 - 0 - A) to (180 +2 - A), or about 165 (i.e., 180 + 0 - 15 ) to about 170 (i.e., 180 + 2 - 12 ) if the can ends are initially formed with a side wall angle A in about the 12 to 15 range. If the can end were initially formed with a side wall angle A of about 14 , the side wall segments in the resulting seamed can end would intersect at an obtuse of about (180 -0 -14 ) to 168 (180 +2 -14 ).
Significantly, seaming according to the current invention causes the can end side wall 14 to permanently kink so as to form a segmented side wall comprised of two substantially straight sections, rather than the unitary, generally arcuate side wall that resulted from conventional seaming methods, shown in Figure 2. This segmented wall structure is created, in part, by closely matching the angles of the chuck and can end side walls so that little or no radial gap is formed between the chuck side wall edge 45 and the can end side wall 14 prior to seaming. The absence a radial gap allows the radially inward motion of the seaming roll 60 to more readily permanently deform the can end side wall.
The formation of the segmented side wall is also facilitated by the fact that the obtuse angle D' of the chuck 42 is sufficiently small to result in permanent kinking of the side wall during seaming. Surprisingly, permanent kinking is achieved without resorting to non-standard can ends having the large side wall angles, as high as 45 , thought necessary according to the prior art, as previously discussed.
Rather, according to the current invention, a kink may be reliably formed during seaming of a conventional can end, having a side wall angle in the 12 to 15 range, by reducing the obtuse angle D' at which the chuck walls intersect to an angle no greater than about 168 . Such reduction in the obtuse angle D' between the chuck side walls is created by employing an angle B' in the chuck lower wall 46 that is very close to, or slightly larger than, the angle A of the can end side wall 14, as previously discussed. This is contrary to the conventional wisdom in the art, which taught that the angle of the chuck lower wall should be several degrees less than the angle of the can end side wall, as previously discussed.
The reduction in the obtuse angle D' at which the chuck walls intersect is also facilitated by forming the upper wa1144 of the chuck 42 so that, rather than being positively tapered as in conventional seaming chucks, the upper chuck wall is cylindrical or slightly negatively tapered, as previously discussed. The use of a cylindrical or negatively tapered chuck upper wall was previously thought unacceptable in the art because of the widely held assumption that such an approach would make it difficult to strip the can end from the chuck. Surprisingly, the inventors have concluded that, with the chuck 42 according to the current invention, the can end side wall 66 will spring back sufficiently far after seaming to allow the can end 10" to be easily stripped from the chuck, even when the angle of the upper chuck wall is negatively tapered as much as A can end 10" made according to the current invention, so as to have a segmented side wall comprised of at least two substantially straight frustoconical portions 66 and 68, will have increased strength, especially increased hoop strength, when compared to the arcuate can end side walls 14' that result from conventional seaming methods, shown in Figure 2.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification, as indicating the scope of the invention.
Significantly, seaming according to the current invention causes the can end side wall 14 to permanently kink so as to form a segmented side wall comprised of two substantially straight sections, rather than the unitary, generally arcuate side wall that resulted from conventional seaming methods, shown in Figure 2. This segmented wall structure is created, in part, by closely matching the angles of the chuck and can end side walls so that little or no radial gap is formed between the chuck side wall edge 45 and the can end side wall 14 prior to seaming. The absence a radial gap allows the radially inward motion of the seaming roll 60 to more readily permanently deform the can end side wall.
The formation of the segmented side wall is also facilitated by the fact that the obtuse angle D' of the chuck 42 is sufficiently small to result in permanent kinking of the side wall during seaming. Surprisingly, permanent kinking is achieved without resorting to non-standard can ends having the large side wall angles, as high as 45 , thought necessary according to the prior art, as previously discussed.
Rather, according to the current invention, a kink may be reliably formed during seaming of a conventional can end, having a side wall angle in the 12 to 15 range, by reducing the obtuse angle D' at which the chuck walls intersect to an angle no greater than about 168 . Such reduction in the obtuse angle D' between the chuck side walls is created by employing an angle B' in the chuck lower wall 46 that is very close to, or slightly larger than, the angle A of the can end side wall 14, as previously discussed. This is contrary to the conventional wisdom in the art, which taught that the angle of the chuck lower wall should be several degrees less than the angle of the can end side wall, as previously discussed.
The reduction in the obtuse angle D' at which the chuck walls intersect is also facilitated by forming the upper wa1144 of the chuck 42 so that, rather than being positively tapered as in conventional seaming chucks, the upper chuck wall is cylindrical or slightly negatively tapered, as previously discussed. The use of a cylindrical or negatively tapered chuck upper wall was previously thought unacceptable in the art because of the widely held assumption that such an approach would make it difficult to strip the can end from the chuck. Surprisingly, the inventors have concluded that, with the chuck 42 according to the current invention, the can end side wall 66 will spring back sufficiently far after seaming to allow the can end 10" to be easily stripped from the chuck, even when the angle of the upper chuck wall is negatively tapered as much as A can end 10" made according to the current invention, so as to have a segmented side wall comprised of at least two substantially straight frustoconical portions 66 and 68, will have increased strength, especially increased hoop strength, when compared to the arcuate can end side walls 14' that result from conventional seaming methods, shown in Figure 2.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification, as indicating the scope of the invention.
Claims (14)
1. A method of seaming a can end to a can body, said can body defining a central axis thereof, comprising the steps of:
a) forming a can end having a side wall and a peripheral seaming panel, said side wall formed by a single substantially straight section disposed at an angle A with respect to said central axis;
b) inserting a chuck into said can end adjacent said side wall, said chuck having upper and lower portions forming upper and lower chuck walls, said lower chuck wall being substantially frustoconical and disposed at an angle B; and c) seaming said seaming panel of said can end to a can body so as to reshape said can end side wall into a segmented side wall comprised of upper and lower substantially straight sections, said upper and lower substantially straight sections intersecting at an obtuse angle F;
wherein said angle A with respect to said central axis is substantially within the range of 12° to 15°, said angle B with respect to said central axis is no less than said angle A, and said upper chuck wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0° to -2°.
a) forming a can end having a side wall and a peripheral seaming panel, said side wall formed by a single substantially straight section disposed at an angle A with respect to said central axis;
b) inserting a chuck into said can end adjacent said side wall, said chuck having upper and lower portions forming upper and lower chuck walls, said lower chuck wall being substantially frustoconical and disposed at an angle B; and c) seaming said seaming panel of said can end to a can body so as to reshape said can end side wall into a segmented side wall comprised of upper and lower substantially straight sections, said upper and lower substantially straight sections intersecting at an obtuse angle F;
wherein said angle A with respect to said central axis is substantially within the range of 12° to 15°, said angle B with respect to said central axis is no less than said angle A, and said upper chuck wall is disposed at an angle C with respect to said central axis that is substantially within the range of 0° to -2°.
2. The method according to claim 1, wherein said obtuse angle F at which said substantially straight sections of can end side wall intersect is substantially within the range of 165° to 170°.
3. The method according to claim 1, wherein said seaming step comprises reshaping said can end side wall so as to form a circumferentially extending crease separating said upper and lower substantially straight sections.
4. The method according to claim 1, wherein said upper and lower chuck walls intersect at an edge forming a radius substantially in the range of 0.025 to 0.51 mm.
5. The method according to claim 1, wherein said can end further comprises a circular bead, said side wall of said can end extending between said circular bead and said peripheral seaming panel.
6. The method according to claim 1, wherein said upper and lower chuck walls intersect at an edge, and wherein the step of inserting said chuck into said can end adjacent said can end side wall comprises inserting said chuck so that there is essentially no gap between said chuck wall edge and said can end side wall.
7. The method according to claim 6, wherein the step of inserting said chuck into said can end adjacent said can end side wall comprises inserting said chuck so that there is an interference between said chuck wall edge and said can end side wall.
8. A chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis substantially in the range of 12°
to 15°, comprising:
a) an upper portion forming an upper wall;
b) a lower portion forming a lower wall, said lower wall being substantially frustoconical; and wherein said upper wall is disposed at an angle C
with respect to said central axis that is substantially within the range of 0° to -2°, and said frustoconical lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162° to 168°
and is disposed at an angle B' with respect to said central axis that is not substantially greater than 16°.
to 15°, comprising:
a) an upper portion forming an upper wall;
b) a lower portion forming a lower wall, said lower wall being substantially frustoconical; and wherein said upper wall is disposed at an angle C
with respect to said central axis that is substantially within the range of 0° to -2°, and said frustoconical lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162° to 168°
and is disposed at an angle B' with respect to said central axis that is not substantially greater than 16°.
9. The chuck according to claim 8, wherein said upper and lower chuck walls intersect at an edge, said edge forming a radius substantially in the range of 0.025 to 0.51 mm.
10. A chuck for use in seaming a can end to a can body, said chuck defining a central axis thereof, said can end having a side wall disposed at an angle A with respect to said central axis, comprising:
a) an upper portion forming an upper wall; and b) a lower portion forming a lower wall, said lower wall being substantially frustoconical and disposed at an angle B with respect to said central axis; and wherein said upper wall is disposed at an angle C
with respect to said central axis that is substantially within the range of 0° to -2°, said angle B with respect to said central axis is not less than said angle A and is not substantially greater than 16°, and said lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162° to 168°.
a) an upper portion forming an upper wall; and b) a lower portion forming a lower wall, said lower wall being substantially frustoconical and disposed at an angle B with respect to said central axis; and wherein said upper wall is disposed at an angle C
with respect to said central axis that is substantially within the range of 0° to -2°, said angle B with respect to said central axis is not less than said angle A and is not substantially greater than 16°, and said lower wall is disposed at an angle D' with respect to said upper wall that is substantially within the range of 162° to 168°.
11. The chuck according to claim 10, wherein said angle C with which said upper wall is disposed substantially in the range of 0° to -2°.
12. A can comprising:
a) a can body defining a central axis thereof; and b) a can end, said can end having a peripheral edge forming a seam in conjunction with said can body that attaches said can end to said can body, said can end having a side wall formed by upper and lower substantially straight sections, said lower substantially straight section being frustoconical and disposed at an angle A with respect to said central axis, said upper and lower substantially straight sections intersecting at an obtuse angle F so as to form a circumferentially extending crease separating said upper and lower substantially straight sections; and wherein said angle A is substantially in the range of 12° to 15°.
a) a can body defining a central axis thereof; and b) a can end, said can end having a peripheral edge forming a seam in conjunction with said can body that attaches said can end to said can body, said can end having a side wall formed by upper and lower substantially straight sections, said lower substantially straight section being frustoconical and disposed at an angle A with respect to said central axis, said upper and lower substantially straight sections intersecting at an obtuse angle F so as to form a circumferentially extending crease separating said upper and lower substantially straight sections; and wherein said angle A is substantially in the range of 12° to 15°.
13. The can according to claim 12, within said obtuse angle F is substantially within the range of 165° to 170°.
14. The can according to claim 12, wherein said can end further comprises a circumferentially extending bead, said side wall of said can end extending between said seam and said bead, said upper substantially straight section of said side wall extending between said seam and said crease, said lower substantially straight section of said side wall extending between said crease and said bead.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/140,722 | 1998-08-26 | ||
| US09/140,722 US6102243A (en) | 1998-08-26 | 1998-08-26 | Can end having a strengthened side wall and apparatus and method of making same |
| PCT/US1999/018944 WO2000012243A2 (en) | 1998-08-26 | 1999-08-19 | Can end having a strengthened side wall and apparatus and method of making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2341197A1 CA2341197A1 (en) | 2000-03-09 |
| CA2341197C true CA2341197C (en) | 2007-10-30 |
Family
ID=22492521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002341197A Expired - Fee Related CA2341197C (en) | 1998-08-26 | 1999-08-19 | Can end having a strengthened side wall and apparatus and method of making same |
Country Status (14)
| Country | Link |
|---|---|
| US (2) | US6102243A (en) |
| EP (1) | EP1119425B1 (en) |
| JP (2) | JP5021859B2 (en) |
| CN (1) | CN1170642C (en) |
| AT (1) | ATE249899T1 (en) |
| AU (1) | AU748316B2 (en) |
| BR (1) | BR9913252A (en) |
| CA (1) | CA2341197C (en) |
| DE (1) | DE69911443T2 (en) |
| DK (1) | DK1119425T3 (en) |
| ES (1) | ES2204151T3 (en) |
| PL (1) | PL190341B1 (en) |
| PT (1) | PT1119425E (en) |
| WO (1) | WO2000012243A2 (en) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130221013A1 (en) * | 1997-04-07 | 2013-08-29 | J. Bruce Kolowich | Thermal receptacle with phase change material |
| US7380684B2 (en) | 1999-12-08 | 2008-06-03 | Metal Container Corporation | Can lid closure |
| CA2472295C (en) * | 1999-12-08 | 2011-11-29 | Tuan A. Nguyen | Metallic beverage can end with improved chuck wall and countersink |
| US6561004B1 (en) * | 1999-12-08 | 2003-05-13 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
| US8490825B2 (en) | 1999-12-08 | 2013-07-23 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
| US6460723B2 (en) * | 2001-01-19 | 2002-10-08 | Ball Corporation | Metallic beverage can end |
| YU67303A (en) * | 2001-02-26 | 2004-11-25 | Ball Corporation | Beverage can end with outwardly extending reinforcing bead |
| US6419110B1 (en) | 2001-07-03 | 2002-07-16 | Container Development, Ltd. | Double-seamed can end and method for forming |
| RU2323796C2 (en) * | 2001-07-03 | 2008-05-10 | Контэйнер Девелопмент, Лтд. | Sheet metal cover |
| US7341163B2 (en) * | 2001-07-03 | 2008-03-11 | Container Development, Ltd. | Can shell and double-seamed can end |
| US7819275B2 (en) * | 2001-07-03 | 2010-10-26 | Container Development, Ltd. | Can shell and double-seamed can end |
| AU2002325369B2 (en) * | 2001-11-05 | 2007-03-01 | Corus Staal Bv | Top cone for an aerosol can, and aerosol can provided with the same |
| US6761280B2 (en) | 2001-12-27 | 2004-07-13 | Alcon Inc. | Metal end shell and easy opening can end for beer and beverage cans |
| US7591392B2 (en) | 2002-04-22 | 2009-09-22 | Crown Packaging Technology, Inc. | Can end |
| US6736283B1 (en) | 2002-11-19 | 2004-05-18 | Alcoa Inc. | Can end, tooling for manufacture of the can end and seaming chuck adapted to affix a converted can end to a can body |
| US6915553B2 (en) * | 2003-02-19 | 2005-07-12 | Rexam Beverage Can Company | Seaming apparatus and method for cans |
| WO2006036934A2 (en) * | 2004-09-27 | 2006-04-06 | Ball Corporation | Container end closure |
| US7506779B2 (en) | 2005-07-01 | 2009-03-24 | Ball Corporation | Method and apparatus for forming a reinforcing bead in a container end closure |
| CN100457561C (en) * | 2006-05-27 | 2009-02-04 | 苏州斯莱克精密设备有限公司 | Anti-atmospheric pressure type metal pop-torp cover |
| JP5208029B2 (en) * | 2009-03-17 | 2013-06-12 | ユニバーサル製缶株式会社 | Can winding device and can winding method |
| JP2011189986A (en) * | 2010-02-17 | 2011-09-29 | Toyo Seikan Kaisha Ltd | Can lid |
| JP5484252B2 (en) * | 2010-08-10 | 2014-05-07 | ユニバーサル製缶株式会社 | Can winding device |
| CN101966887A (en) * | 2010-08-10 | 2011-02-09 | 无锡市四方制桶有限公司 | Pre-rolling free bottom cap of steel drum |
| JP5484273B2 (en) * | 2010-09-07 | 2014-05-07 | ユニバーサル製缶株式会社 | Can winding device |
| JP5452435B2 (en) * | 2010-09-21 | 2014-03-26 | ユニバーサル製缶株式会社 | Can winding method and can winding device |
| US9550604B2 (en) | 2010-10-18 | 2017-01-24 | Silgan Containers Llc | Can end with strengthening bead configuration |
| USD653109S1 (en) | 2010-10-18 | 2012-01-31 | Stolle Machinery Company, Llc | Can end |
| US8727169B2 (en) | 2010-11-18 | 2014-05-20 | Ball Corporation | Metallic beverage can end closure with offset countersink |
| 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 |
| CN103057789A (en) * | 2012-11-20 | 2013-04-24 | 东莞市精丽制罐有限公司 | Box body aluminum bottom rolling and sealing structure of food box and secondary stamping buckle lock-bottom rolling and sealing manufacturing method thereof |
| US9181007B2 (en) | 2013-03-12 | 2015-11-10 | Rexam Beverage Can Company | Beverage can end with vent port |
| US9181015B2 (en) | 2013-03-15 | 2015-11-10 | Raymond Booska | Thermal receptacle with phase change material |
| US11206938B2 (en) | 2013-03-15 | 2021-12-28 | Raymond Booska | Thermal receptacle with phase change material |
| JP2014094411A (en) * | 2013-12-27 | 2014-05-22 | Universal Seikan Kk | Can winding-fastening part structure |
| US10894630B2 (en) * | 2017-08-30 | 2021-01-19 | Stolle Machinery Company, Llc | Pressure can end compatible with standard can seamer |
| KR102394443B1 (en) * | 2020-09-21 | 2022-05-03 | 이정열 | Can Seaming apparatus having multifunctiona seaming chuck |
Family Cites Families (109)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2346165A (en) * | 1940-07-23 | 1944-04-11 | American Can Co | Container |
| US2321408A (en) * | 1941-10-30 | 1943-06-08 | Continental Can Co | Sheet-metal container |
| US2700355A (en) * | 1949-11-10 | 1955-01-25 | Annie B Erb | Method and apparatus for collapsing the countersink wall of a can end |
| US3023927A (en) | 1959-06-24 | 1962-03-06 | George L Ehman | Protector seals |
| US3417898A (en) * | 1965-10-20 | 1968-12-24 | Continental Can Co | Dual wall can end |
| US3409168A (en) * | 1965-10-24 | 1968-11-05 | Continental Can Co | Container |
| US3537291A (en) * | 1967-10-04 | 1970-11-03 | Reynolds Metals Co | Apparatus for and method of forming an end closure for a can |
| GB1276662A (en) * | 1968-12-12 | 1972-06-07 | Petfoods Ltd | Improvements in cans |
| AU443940B2 (en) | 1970-04-29 | 1973-12-13 | Union Carbide Corporation | Union carbide corporation |
| US3672318A (en) * | 1970-05-01 | 1972-06-27 | Continental Can Co | Support for ham cans during double seaming |
| DE2134034C3 (en) * | 1971-07-08 | 1980-04-17 | Rheinpfaelzische Blechemballagenfabrik G. Schoenung & Co Kg, 6730 Neustadt | Seam formation between a metal container and the top or bottom |
| US3967752A (en) | 1972-09-28 | 1976-07-06 | Reynolds Metals Company | Easy-open wall |
| US3843014A (en) | 1973-03-16 | 1974-10-22 | Pechiney Ugine Kuhlmann | Container cover |
| US3957005A (en) * | 1974-06-03 | 1976-05-18 | Aluminum Company Of America | Method for making a metal can end |
| US4093102A (en) * | 1974-08-26 | 1978-06-06 | National Can Corporation | End panel for containers |
| US4015744A (en) | 1975-10-28 | 1977-04-05 | Ermal C. Fraze | Easy-open ecology end |
| US4031837A (en) * | 1976-05-21 | 1977-06-28 | Aluminum Company Of America | Method of reforming a can end |
| US4024981A (en) | 1976-07-01 | 1977-05-24 | Ermal C. Fraze | Easy-open ecology end |
| US4102467A (en) * | 1977-05-04 | 1978-07-25 | Wescan, Inc. | Tapered plastic container with seamed metal end and method for making it |
| US4217843A (en) * | 1977-07-29 | 1980-08-19 | National Can Corporation | Method and apparatus for forming ends |
| US4109599A (en) * | 1977-11-04 | 1978-08-29 | Aluminum Company Of America | Method of forming a pressure resistant end shell for a container |
| US4150765A (en) | 1977-11-10 | 1979-04-24 | The Continental Group, Inc. | Tab construction for easy opening container |
| US4148410A (en) | 1978-01-30 | 1979-04-10 | Ermal C. Fraze | Tab for easy-open ecology end |
| US4308970A (en) * | 1978-11-27 | 1982-01-05 | Holdt J W Von | Plastic bucket defining annular inwardly projecting ridge |
| US4448322A (en) | 1978-12-08 | 1984-05-15 | National Can Corporation | Metal container end |
| US4210257A (en) | 1979-06-21 | 1980-07-01 | American Can Company | Fracture and tear-resistant retained tab |
| US4276993A (en) | 1979-10-10 | 1981-07-07 | The Continental Group, Inc. | Easy-opening container with non-detach tab |
| US4538758A (en) * | 1979-10-11 | 1985-09-03 | Automated Container Corporation | Composite container |
| DE3046726A1 (en) * | 1979-12-21 | 1981-08-27 | Metal Box Ltd., Reading, Berkshire | PLASTIC CONTAINER WITH METAL LID |
| AU541926B2 (en) * | 1980-01-16 | 1985-01-31 | American Can Co. | Buckle resistant can end |
| US4809861A (en) * | 1980-01-16 | 1989-03-07 | American National Can Company | Buckle resistant can end |
| JPS57117323U (en) * | 1981-01-12 | 1982-07-21 | ||
| JPS5841633A (en) * | 1981-09-02 | 1983-03-10 | Kishimoto Akira | Double wind-clamping method and its device |
| US4402421A (en) | 1981-11-27 | 1983-09-06 | Crown Cork & Seal Company, Inc. | Container closure having easy-opening means |
| US4577774A (en) * | 1982-03-11 | 1986-03-25 | Ball Corporation | Buckle resistance for metal container closures |
| US4434641A (en) * | 1982-03-11 | 1984-03-06 | Ball Corporation | Buckle resistance for metal container closures |
| USD279265S (en) | 1982-04-14 | 1985-06-18 | National Can Corporation | End closure for a container |
| US4516420A (en) * | 1983-06-10 | 1985-05-14 | Redicon Corporation | Shell tooling |
| US4578007A (en) * | 1982-09-29 | 1986-03-25 | Aluminum Company Of America | Reforming necked-in portions of can bodies |
| USD285661S (en) | 1983-04-26 | 1986-09-16 | Metal Box P.L.C. | Container closure |
| US4549424A (en) * | 1983-06-10 | 1985-10-29 | Redicon Corporation | Shell tooling method |
| US4626158A (en) * | 1983-07-05 | 1986-12-02 | Gallay S.A. | Container seam and a process for forming a container seam |
| US4465204A (en) | 1983-07-13 | 1984-08-14 | The Stolle Corporation | Pull tab for easy open end |
| US4641761A (en) * | 1983-10-26 | 1987-02-10 | Ball Corporation | Increased strength for metal beverage closure through reforming |
| US4559801A (en) * | 1983-10-26 | 1985-12-24 | Ball Corporation | Increased strength for metal beverage closure through reforming |
| US4735863A (en) * | 1984-01-16 | 1988-04-05 | Dayton Reliable Tool & Mfg. Co. | Shell for can |
| US4567746A (en) * | 1984-01-16 | 1986-02-04 | Dayton Reliable Tool & Mfg. Co. | Method and apparatus for making shells for cans |
| US4722215A (en) * | 1984-02-14 | 1988-02-02 | Metal Box, Plc | Method of forming a one-piece can body having an end reinforcing radius and/or stacking bead |
| US4606472A (en) * | 1984-02-14 | 1986-08-19 | Metal Box, P.L.C. | Reinforced can end |
| US4571978A (en) | 1984-02-14 | 1986-02-25 | Metal Box P.L.C. | Method of and apparatus for forming a reinforced can end |
| US4587825A (en) * | 1984-05-01 | 1986-05-13 | Redicon Corporation | Shell reforming method and apparatus |
| US4587826A (en) * | 1984-05-01 | 1986-05-13 | Redicon Corporation | Container end panel forming method and apparatus |
| US4524879A (en) * | 1984-06-18 | 1985-06-25 | Van Dorn Company | Can end pour spout and pull tab construction |
| US4685582A (en) | 1985-05-20 | 1987-08-11 | National Can Corporation | Container profile with stacking feature |
| FR2570969B1 (en) * | 1984-10-03 | 1989-01-20 | Gallay Sa | PROCESS FOR SHUTTERING WITH CRIMPING AND SHRINKING OF AN END OF A RUBBER BY A CRIMPED BOTTOM AND CRIMPING MANDREL SUITABLE FOR ITS IMPLEMENTATION. |
| US4667384A (en) * | 1984-12-13 | 1987-05-26 | Continental Plastic Beverage Bottles, Inc. | Method of manufacturing a plastic container having an enlarged free end portion for receiving a metal end unit by double seaming |
| US4574608A (en) * | 1985-02-04 | 1986-03-11 | Redicon Corporation | Single station, in-die curling of can end closures |
| US5016785A (en) * | 1985-05-13 | 1991-05-21 | Pittway Corp. | Skirtless mounting cup |
| USD304302S (en) | 1985-06-05 | 1989-10-31 | The Broken Hill Proprietary Company Limited | Can end |
| GB8523262D0 (en) | 1985-09-20 | 1985-10-23 | Metal Box Plc | Metal can end |
| USD300608S (en) | 1985-09-20 | 1989-04-11 | Mb Group Plc | Container closure |
| GB8523263D0 (en) | 1985-09-20 | 1985-10-23 | Metal Box Plc | Making metal can ends |
| JPH0239634Y2 (en) * | 1985-09-27 | 1990-10-24 | ||
| GB8609459D0 (en) * | 1986-04-17 | 1986-05-21 | Int Paint Plc | Bottom seam for pail |
| JPH0117395Y2 (en) * | 1986-05-14 | 1989-05-19 | ||
| US4716755A (en) * | 1986-07-28 | 1988-01-05 | Redicon Corporation | Method and apparatus for forming container end panels |
| US4808052A (en) * | 1986-07-28 | 1989-02-28 | Redicon Corporation | Method and apparatus for forming container end panels |
| US4681238A (en) | 1986-10-03 | 1987-07-21 | Sanchez Ruben G | Re-closure device for pop top containers |
| US4713958A (en) * | 1986-10-30 | 1987-12-22 | Redicon Corporation | Method and apparatus for forming container end panels |
| US4715208A (en) | 1986-10-30 | 1987-12-29 | Redicon Corporation | Method and apparatus for forming end panels for containers |
| US4865506A (en) * | 1987-08-24 | 1989-09-12 | Stolle Corporation | Apparatus for reforming an end shell |
| US5115938A (en) * | 1987-10-30 | 1992-05-26 | Tri-Tech Systems International, Inc. | Containers and cans and method of and apparatus for producing the same |
| GB8807117D0 (en) * | 1988-03-25 | 1988-04-27 | Metal Box Plc | Lid retaining collar |
| GB8810229D0 (en) | 1988-04-29 | 1988-06-02 | Metal Box Plc | Can end shells |
| JPH0337804Y2 (en) * | 1988-07-14 | 1991-08-09 | ||
| US4903521A (en) * | 1988-09-02 | 1990-02-27 | Redicon Corporation | Method and apparatus for forming, reforming and curling shells in a single press |
| US4977772A (en) * | 1988-09-02 | 1990-12-18 | Redicon Corporation | Method and apparatus for forming reforming and curling shells in a single press |
| US5071302A (en) * | 1988-09-13 | 1991-12-10 | Continental Can Company, Inc. | Notched double seaming chuck |
| NL8802339A (en) | 1988-09-21 | 1990-04-17 | Leer Koninklijke Emballage | METHOD FOR MANUFACTURING A SHEARING JOINT |
| US4955223A (en) * | 1989-01-17 | 1990-09-11 | Formatec Tooling Systems, Inc. | Method and apparatus for forming a can shell |
| JPH02192837A (en) * | 1989-01-23 | 1990-07-30 | Toyo Seikan Kaisha Ltd | Production of end wall for pressure resistant container |
| US4930658A (en) | 1989-02-07 | 1990-06-05 | The Stolle Corporation | Easy open can end and method of manufacture thereof |
| US4991735A (en) * | 1989-05-08 | 1991-02-12 | Aluminum Company Of America | Pressure resistant end shell for a container and method and apparatus for forming the same |
| US4934168A (en) * | 1989-05-19 | 1990-06-19 | Continental Can Company, Inc. | Die assembly for and method of forming metal end unit |
| JPH03275443A (en) * | 1990-03-10 | 1991-12-06 | Toyo Seikan Kaisha Ltd | Manufacture of lid for use on pressure proof can and the same lid |
| US5320468A (en) * | 1990-07-13 | 1994-06-14 | Kramer Antonio H | Tin can manufacturing process |
| US5069356A (en) * | 1990-11-08 | 1991-12-03 | Automated Container Corporation | Easy open end with temporary retention center for safety purposes |
| US5064087A (en) | 1990-11-21 | 1991-11-12 | Koch Systems Incorporated | Self-opening can lid with improved contour of score |
| AU113173S (en) | 1990-12-01 | 1992-01-15 | Cmb Foodcan Plc | Can end |
| US5149238A (en) * | 1991-01-30 | 1992-09-22 | The Stolle Corporation | Pressure resistant sheet metal end closure |
| US5129541A (en) | 1991-06-04 | 1992-07-14 | Buhrke Industries, Inc. | Easy open ecology end for cans |
| JP3187910B2 (en) * | 1992-01-10 | 2001-07-16 | 三菱重工業株式会社 | Seaming chuck |
| GB9204972D0 (en) * | 1992-03-06 | 1992-04-22 | Cmb Foodcan Plc | Laminated metal sheet |
| US5221183A (en) * | 1992-03-13 | 1993-06-22 | Alco Industries, Inc. | Blower housing seam and method of making same |
| JPH067869A (en) * | 1992-05-13 | 1994-01-18 | Osaka Aerosol Ind Corp | Structure for attaching lid of sealed container |
| DE9211788U1 (en) * | 1992-09-02 | 1993-01-07 | Schmalbach-Lubeca Ag, 3300 Braunschweig, De | |
| JPH06198365A (en) * | 1992-09-21 | 1994-07-19 | Hokkai Can Co Ltd | Seaming device for can top |
| US5356256A (en) * | 1992-10-02 | 1994-10-18 | Turner Timothy L | Reformed container end |
| USD352898S (en) | 1992-11-10 | 1994-11-29 | Carnaudmetalbox S.A. | Easy opening end closure |
| JP3468548B2 (en) | 1993-06-30 | 2003-11-17 | 三菱マテリアル株式会社 | Stay-tab type can lid |
| US5346087A (en) * | 1993-07-23 | 1994-09-13 | Klein Gerald B | Reinforced beverage can end with push down gate |
| US5460286A (en) * | 1993-08-04 | 1995-10-24 | James River Corporation Of Virginia | Beverage cup lid having an annular flange extension for increased cap retention force, and method of manufacture |
| GB2288759B (en) * | 1994-04-20 | 1997-11-19 | Metal Box Plc | Apparatus for forming a seam |
| GB9510515D0 (en) * | 1995-05-24 | 1995-07-19 | Metal Box Plc | Containers |
| USD406236S (en) | 1995-10-05 | 1999-03-02 | Crown Cork & Seal Technologies Corporation | Can end |
| US5636761A (en) * | 1995-10-16 | 1997-06-10 | Dispensing Containers Corporation | Deformation resistant aerosol container cover |
| US5685189A (en) * | 1996-01-22 | 1997-11-11 | Ball Corporation | Method and apparatus for producing container body end countersink |
| US5971259A (en) * | 1998-06-26 | 1999-10-26 | Sonoco Development, Inc. | Reduced diameter double seam for a composite container |
| DE102004037233A1 (en) | 2004-07-31 | 2006-02-16 | Robert Bosch Gmbh | Navigation system with map display and method for adapting a map display in a navigation system |
-
1998
- 1998-08-26 US US09/140,722 patent/US6102243A/en not_active Expired - Lifetime
-
1999
- 1999-08-19 ES ES99943775T patent/ES2204151T3/en not_active Expired - Lifetime
- 1999-08-19 PT PT99943775T patent/PT1119425E/en unknown
- 1999-08-19 AT AT99943775T patent/ATE249899T1/en active
- 1999-08-19 BR BR9913252-4A patent/BR9913252A/en not_active IP Right Cessation
- 1999-08-19 PL PL99347311A patent/PL190341B1/en unknown
- 1999-08-19 CA CA002341197A patent/CA2341197C/en not_active Expired - Fee Related
- 1999-08-19 AU AU56806/99A patent/AU748316B2/en not_active Ceased
- 1999-08-19 WO PCT/US1999/018944 patent/WO2000012243A2/en active IP Right Grant
- 1999-08-19 JP JP2000567327A patent/JP5021859B2/en not_active Expired - Lifetime
- 1999-08-19 CN CNB998101427A patent/CN1170642C/en not_active Expired - Fee Related
- 1999-08-19 EP EP99943775A patent/EP1119425B1/en not_active Expired - Lifetime
- 1999-08-19 DK DK99943775T patent/DK1119425T3/en active
- 1999-08-19 DE DE69911443T patent/DE69911443T2/en not_active Expired - Lifetime
-
2000
- 2000-07-26 US US09/625,772 patent/US6408498B1/en not_active Expired - Lifetime
-
2010
- 2010-09-27 JP JP2010215656A patent/JP5285675B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| AU5680699A (en) | 2000-03-21 |
| EP1119425B1 (en) | 2003-09-17 |
| PL347311A1 (en) | 2002-03-25 |
| US6408498B1 (en) | 2002-06-25 |
| CN1170642C (en) | 2004-10-13 |
| AU748316B2 (en) | 2002-05-30 |
| CN1314831A (en) | 2001-09-26 |
| WO2000012243A2 (en) | 2000-03-09 |
| DE69911443D1 (en) | 2003-10-23 |
| JP2002523244A (en) | 2002-07-30 |
| EP1119425A2 (en) | 2001-08-01 |
| JP5285675B2 (en) | 2013-09-11 |
| DE69911443T2 (en) | 2004-07-22 |
| ES2204151T3 (en) | 2004-04-16 |
| US6102243A (en) | 2000-08-15 |
| ATE249899T1 (en) | 2003-10-15 |
| JP2011036920A (en) | 2011-02-24 |
| WO2000012243A3 (en) | 2000-06-22 |
| JP5021859B2 (en) | 2012-09-12 |
| PL190341B1 (en) | 2005-11-30 |
| PT1119425E (en) | 2003-12-31 |
| BR9913252A (en) | 2001-05-22 |
| CA2341197A1 (en) | 2000-03-09 |
| DK1119425T3 (en) | 2003-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2341197C (en) | Can end having a strengthened side wall and apparatus and method of making same | |
| AU599143B2 (en) | Method and apparatus for forming end panels for containers and end panels formed thereby | |
| CA2339648C (en) | Method and apparatus for forming a can end having an anti-peaking bead | |
| EP1237666B1 (en) | Can lid closure and method of joining a can lid closure to a can body | |
| AU676074B2 (en) | Method and apparatus for performing multiple necking operations on a container body | |
| US4991735A (en) | Pressure resistant end shell for a container and method and apparatus for forming the same | |
| US5605248A (en) | Beverage container with wavy transition wall geometry | |
| EP0365063B1 (en) | Method of manufacturing a seam connection | |
| IL159505A (en) | Can shell and double-seamed can end | |
| AU2002354810A1 (en) | Can shell and double-seamed can end | |
| US4055133A (en) | Method and apparatus for triple roll seaming end closures to container bodies | |
| IL174487A (en) | Can shell and double seamed can end | |
| BG62278B1 (en) | Method and device for additional treatment of a closing cover made of steel sheet | |
| MXPA01001971A (en) | Can end having a strengthened side wall and apparatus and method of making same | |
| MXPA01001972A (en) | Dual-rated current transformer circuit | |
| JPH0919732A (en) | Metal can necking-in tool | |
| JPH11169979A (en) | Method for working aluminum di can | |
| JPS5924529A (en) | Correction of neck in part of can |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20190819 |