Can Shell and Double-Seamed Can End Closure

Patent metadata

Field	Value
Publication number	US-2016264288-A1
Application number	US-201615098363-A
Country	US
Kind code	A1
Filing date	Apr 14, 2016
Priority date	Jul 3, 2001
Publication date	Sep 15, 2016
Grant date	—

Abstract

A drawn aluminum can shell has a peripheral crown which is double-seamed with an end portion of an aluminum can body to provide a can end having a generally flat center panel connected by an inclined curved or straight panel wall to an inner wall of an annular U-shaped countersink. The countersink has an outer wall which connects with a lower wall portion of a chuck wall, and the chuck wall has an upper wall portion which connects with an inner wall of the crown. The chuck wall also has an intermediate wall portion forming a break, and the inner bottom width of the countersink is less than the radial width of the panel wall.

First claim

What is claimed is:

1 . A one-piece sheet metal end closure having a vertical center axis and a curled peripheral crown adapted to be double-seamed to a container body, the end closure further comprising:
a circular center panel connected by a panel wall to an inner wall portion of a countersink having an outer wall portion and a generally U-shaped cross-sectional configuration, a chuck wall having a lower wall portion connected to the outer wall portion of the countersink and an upper wall portion connected to an inner wall portion of the curled peripheral crown, the upper wall portion of the chuck wall forming an angular break with the lower wall portion of the chuck wall, the upper wall portion of the chuck wall having opposite end points defining in axial cross-section a first angle relative to the vertical center axis that is greater than a second angle relative to the vertical center axis that is defined by opposite end points of the lower wall portion of the chuck wall in axial cross-section, the inner wall portion of the curled peripheral crown forming an angular junction with the upper wall portion of the chuck wall and extending from the junction at a third angle relative to the vertical center axis that is less than the first angle in axial cross-section, and at least a portion of the upper wall portion of the chuck wall projecting above the circular center panel, and the upper wall portion of the chuck wall having a horizontal radial width defined between the angular junction and the angular break which is greater than a horizontal radial width of the countersink adjacent a bottom of the countersink and defined between the inner and outer wall portions of the countersink.

2 . The end closure of claim 1 , wherein the panel wall defines a horizontal radial width between junctures with the circular center panel and the inner wall portion of the countersink, and the horizontal radial width of the panel wall is greater than the horizontal radial width of the countersink adjacent the bottom of the countersink.

3 . The end closure of claim 2 , wherein the panel wall has opposite end points at junctures with the circular center panel and the inner wall portion of the countersink, with the opposite end points of the panel wall defining in axial cross-section a fourth angle relative to the vertical center axis that is within a range of 30 degrees to 60 degrees.

4 . The end closure of claim 3 , wherein the panel wall is curved between the opposite end points thereof.

5 . The end closure of claim 4 , wherein the curved panel wall defines a radius of curvature between the opposite end points thereof that is greater than the horizontal radial width of the countersink adjacent the bottom of the countersink.

6 . The end closure of claim 1 , wherein the upper wall portion of the chuck wall is a frusto-conical wall in axial cross-section between the opposite end points thereof.

7 . The end closure of claim 6 , wherein the second angle defined by opposite end points of the lower wall portion of the chuck wall is within a range of 3 degrees to 19 degrees.

8 . The end closure of claim 1 , wherein the third angle defined by the inner wall portion of the curled peripheral crown is within a range of 5 degrees to 30 degrees.

9 . The end closure of claim 1 , wherein following double-seaming to the container body, the end closure defines an overall height defined between a top of the curled peripheral crown and the bottom of the countersink, the overall height being less than 0.240 inches.

10 . A one-piece metallic end closure adapted for double seaming to a container, the end closure comprising:
a circular center panel having a vertical center axis; an annular countersink comprising an inner wall portion and an outer wall portion and having a generally U-shaped cross-sectional configuration; a panel wall interconnected to the inner wall portion of the countersink and interconnected to the circular center panel, the panel wall being at least partially curved between opposite end points thereof defined at junctures with the circular center panel and the inner wall portion of the countersink, the opposite end points of the panel wall defining in axial cross-section an angle relative to the vertical center axis that is within a range of 30 degrees to 60 degrees; an annular chuck wall comprising an at least partially curved lower wall portion interconnected to the outer wall portion of the countersink and an inclined upper wall portion interconnected to the lower wall portion; a curled peripheral crown including an inclined inner wall portion interconnected to the upper wall portion of the annular chuck wall; and at least a portion of the upper wall portion of the annular chuck wall projecting above the circular center panel, and the upper wall portion of the annular chuck wall having a horizontal radial width, defined between interconnections to the lower wall portion of the annular chuck wall and the inner wall portion of the curled peripheral crown, which is greater than a horizontal radial width of the countersink adjacent a bottom of the countersink and defined between the inner and outer wall portions of the countersink.

11 . The end closure of claim 10 , wherein the panel wall defines a horizontal radial width between junctures with the circular center panel and the inner wall portion of the countersink, and the horizontal radial width of the panel wall is greater than the horizontal radial width of the countersink adjacent the bottom of the countersink.

12 . The end closure of claim 11 , wherein the panel wall is curved along an entirety between the opposite end points thereof.

13 . The end closure of claim 12 , wherein the curved panel wall defines a radius of curvature between the opposite end points thereof that is greater than the horizontal radial width of the countersink adjacent the bottom of the countersink.

14 . The end closure of claim 10 , wherein the upper wall portion of the annular chuck wall has opposite end points defining in axial cross-section a first angle relative to the vertical center axis that is greater than a second angle relative to the vertical center axis that is defined by opposite end points of the lower wall portion of the annular chuck wall in axial cross-section, and wherein the inner wall portion of the curled peripheral crown extends at a third angle relative to the vertical center axis that is less than the first angle in axial cross-section.

15 . The end closure of claim 14 , wherein the upper wall portion of the annular chuck wall is a frusto-conical wall in axial cross-section between the opposite end points thereof.

16 . The end closure of claim 15 , wherein the second angle defined by opposite end points of the lower wall portion of the annular chuck wall is within a range of 3 degrees to 19 degrees.

17 . The end closure of claim 16 , wherein the third angle defined by the inner wall portion of the curled peripheral crown is within a range of 5 degrees to 30 degrees.

18 . The end closure of claim 10 , wherein following double-seaming to the container body, the end closure defines an overall height defined between a top of the curled peripheral crown and the bottom of the countersink, the overall height being less than 0.240 inches.

Assignees

• Container Dev Ltd
• Ball Corp

Inventors

• Stodd R Peter
• Bathurst Jess N

Classifications

• B65D7/36 Primary

  formed by rolling, or by rolling and pressing · CPC title

• B65D15/00 Primary

  Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials (specially constructed to be opened by cutting, piercing, or tearing, of wall portions B65D17/00; pallets B65D19/00) · CPC title

• B65D7/12

  characterised by wall construction or by connections between walls · CPC title

• B21D51/32

  by rolling · CPC title

• B65D17/08 Primary

  Closures secured by folding or rolling and pressing · CPC title