Seaming apparatus and method for seaming ends to cans are described. The
seaming apparatus includes a seaming chuck received by the can end. The chuck includes
an anvil portion and a peripheral upper anvil wall. The upper anvil wall is inclined
at an angle of greater than or equal to 6 degrees. The seaming apparatus
also includes a seaming roll having a seaming surface for engaging the peripheral
curl of the can end in a seaming operation to compress the peripheral curl against
the peripheral flange and the peripheral upper anvil wall of the seaming chuck.
The seaming surface of the seaming roll is inclined relative to the longitudinal
axis by an angle . The value of is selected to be greater than about
4 degrees, and more preferably from between about 8 and about 14 degrees. Additionally,
the value of bears a close approximate relationship to the value of ,
and in particular the value of angle =up to about 4 degrees.
