Pressure can end compatible with standard can seamer

Patent metadata

Field	Value
Publication number	US-10894630-B2
Application number	US-201715690792-A
Country	US
Kind code	B2
Filing date	Aug 30, 2017
Priority date	Aug 30, 2017
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A can end including a center panel, an annular portion disposed about the center panel, a standard chuck wall disposed about the annular portion, and a curl extending radially outwardly from the standard chuck wall. The annular portion includes an enhanced annular countersink.

First claim

What is claimed is:

1. A can end structured to be coupled to a can body, the can end comprising:
a center panel;
an annular portion disposed about said center panel;
a chuck wall disposed about said annular portion;
a curl extending radially outwardly from the chuck wall; and
said annular portion including an enhanced annular countersink and an annular tapered portion extending about said enhanced annular countersink,
wherein said enhanced annular countersink begins and ends in different planes and includes a generally curvilinear portion extending over an arc of between about 115° and 160°,
wherein said annular tapered portion extends from a first end disposed adjacent said enhanced annular countersink to a second end disposed adjacent the chuck wall,
wherein the second end of said annular tapered portion is disposed below the plane of said center panel, and
wherein the chuck wall extends generally vertically perpendicular to the plane of said center panel.

2. The can end of claim 1 wherein:
said center panel is generally planar and has a final thickness;
said annular portion includes an enhanced annular planar portion; and
said enhanced annular planar portion extending generally perpendicular to the plane of said center panel.

3. The can end of claim 1 wherein:
said center panel is generally planar and has a final thickness;
said annular tapered portion is angled between about 25° and 50° to the plane of said center panel; and
said annular tapered portion has a radial width of between about six and eight times the center panel final thickness.

4. The can end of claim 3 wherein:
said annular tapered portion includes a first section and a second section;
said annular tapered portion first section disposed about said enhanced annular countersink;
said annular tapered portion second section disposed about said annular tapered portion first section;
said annular tapered portion first section angled between about 35° and 65° to the plane of said center panel; and
said annular tapered portion second section angled between 15° and 30° to the plane of said center panel.

5. The can end of claim 4 wherein:
said annular tapered portion first section has a height of between about 0.040 inch and 0.085 inch; and
said annular tapered portion second section has a height of between about 0.010 inch and 0.030 inch.

6. The can end of claim 1 wherein:
said center panel, said annular portion, said chuck wall and said curl are structured to be coupled to a food can body; and
said annular portion includes an annular ridge.

7. A container comprising:
a can body including a base and a depending sidewall, said can body defining a generally enclosed space;
a can end including a center panel, an annular portion disposed about said center panel, a chuck wall disposed about said annular portion, a curl extending radially outwardly from the chuck wall; and
said annular portion including an enhanced annular countersink and an annular tapered portion extending about said enhanced annular countersink,
wherein said enhanced annular countersink begins and ends in different planes and includes a generally curvilinear portion extending over an arc of between about 115° and 160°,
wherein said annular tapered portion extends from a first end disposed adjacent said enhanced annular countersink to a second end disposed adjacent the chuck wall,
wherein the second end of said annular tapered portion is disposed below the plane of said center panel, and
wherein the chuck wall extends generally vertically perpendicular to the plane of said center panel.

8. The container of claim 7 wherein:
said center panel is generally planar and has a final thickness;
said annular portion includes an enhanced annular planar portion; and
said enhanced annular planar portion extending generally perpendicular to the plane of said center panel.

9. The container of claim 7 wherein:
said center panel is generally planar and has a final thickness;
said annular tapered portion is angled between about 25° and 50° 0 to the plane of said center panel; and
said annular tapered portion has a radial width of between about six and eight times the center panel final thickness.

10. The container of claim 7 wherein said annular portion includes an annular ridge.

11. A tooling for fanning a can end, said tooling comprising:
an upper tool assembly;
a lower tool assembly;
said upper tool assembly and said lower tool assembly are structured to cooperate to form material disposed therebetween into a can end, said can end including a center panel, an annular portion disposed about said center panel, a chuck wall disposed about said annular portion, a curl extending radially outwardly from the chuck wall; and
wherein said upper tool assembly and said lower tool assembly further cooperate to form said annular portion with an enhanced annular countersink and an annular tapered portion extending about said enhanced annular countersink,
wherein said enhanced annular countersink begins and ends in different planes and includes a generally curvilinear portion extending over an arc of between about 115° and 160°,
wherein said annular tapered portion extends from a first end disposed adjacent said enhanced annular countersink to a second end disposed adjacent the chuck wall,
wherein the second end of said annular tapered portion is disposed below the plane of said center panel, and
wherein the chuck wall extends generally vertically perpendicular to the plane of said center panel.

12. The tooling of claim 11 wherein said center panel is generally planar with a final thickness, said enhanced annular countersink includes an enhanced annular planar portion, and, wherein said upper tool assembly and said lower tool assembly are structured to form said enhanced annular planar portion extending generally perpendicular to the plane of said center panel.

13. The tooling of claim 11 wherein said center panel is generally planar with a final thickness, and wherein:
said upper tool assembly and said lower tool assembly are structured to form said annular tapered portion to be angled between about 25° and 50° to the plane of said center panel; and
said upper tool assembly and said lower tool assembly are structured to form said annular tapered portion with a radial width of between about six and eight times the center panel final thickness.

14. A method of forming a can end comprising:
providing a sheet material defining an original plane;
providing a tooling with an upper tool assembly and a lower tool assembly;
introducing material between said upper tool assembly and said lower tool assembly;
forming said material to include a center panel, an annular portion disposed about said center panel, a chuck wall disposed about said annular portion, and a curl extending radially outwardly from the chuck wall; and
forming said annular portion to include an enhanced annular countersink and an annular tapered portion wherein said annular tapered portion is disposed about said enhanced annular countersink,
wherein said enhanced annular countersink begins and ends in different planes and includes a generally curvilinear portion extending over an arc of between about 115° and 160°,
wherein said annular tapered portion extends from a first end disposed adjacent said enhanced annular countersink to a second end disposed adjacent the chuck wall,
wherein the second end of said annular tapered portion is disposed below the plane of said center panel, and
wherein the chuck wall extends generally vertically perpendicular to the plane of said center panel.

Assignees

• Stolle Machinery Co Llc

Inventors

• Albright Steven Todd
• Will Robert Joseph
• Stammen Dennis Cornelius

Classifications

• B21D51/44 Primary

  Making closures, e.g. caps (folded of thin metal foils in the way of making paper caps B31D5/00; making closures in conjunction with applying same B67B) · CPC title

• B65D2517/0062

  and provided with an additional U-shaped peripheral channel · CPC title

• B65D2517/0016

  pivot tab, push-down and pull-out tear panel · CPC title

• B65D17/4011

  for opening completely by means of a tearing tab · CPC title

• B65D17/08 Primary

  Closures secured by folding or rolling and pressing · CPC title