Pressure can end compatible with standard can seamer

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.

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.

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.