Making can bodies

Claim 3

The method of claim 1 wherein the extent of said resilient axial urging of the flange is limited to stop short of clamping the flange flat against the beading means.

Claim 4

The method of claim 2 wherein the resilient axial urging of the flange is effected by means carried by the mandrel and axial movement thereof is limited by the mandrel.

Claim 5

The method of claim 3 wherein the resilient axial urging of the flange is effected by means carried by the mandrel.

Claim 6

The method of claim 4 wherein the resilient axial urging of the flange is effected by means carried by the mandrel and axial movement thereof is limited by the mandrel.

Claim 7

Apparatus for making an end-necked can body, including a mandrel for carrying a thin tubular metal Can body having a previously formed flange, said mandrel having a neck founded at one end by an annular surface for abutting the outer end face of a flange previously formed around an open end of a can body, said annular surface being formed separate and apart from said neck and being axially movable relative thereto, and resilient means for axially urging said surface against a flange; b. beading means axially aligned with said neck and including a body-engaging portion having a profile generally complementary to said mandrel neck substantially corresponding to the required external cross-section of a neck on a can body; and c. means for causing relative rotation between the beading means and the mandrel: the beading means being adapted to cause relative approaching movement in a generally radial direction between the beading means and the mandrel, so that when a said can body is mounted on the mandrel a neck can be rolled, between the beading means and the mandrel, on the body immediately behind the said flange and merging therewith.

Claim 8

Apparatus for making an end-necked can body, including a mandrel for carrying a thin tubular metal Can body having a previously formed flange, said mandrel having a neck founded at one end by an annular surface for abutting the outer end face of a flange previously formed around an open end of a can body, said annular surface being formed separate and apart from said neck and being axially movable relative thereto, and resilient means for axially urging said surface against a flange; b. beading means axially aligned with said neck and including a body-engaging portion having a profile generally complementary to said mandrel neck substantially corresponding to the required external cross-section of a neck on a can body; and c. means for causing relative rotation between the beading means and the mandrel: the beading means being adapted to cause relative approaching movement in a generally radial direction between the beading means and the mandrel, so that when a said can body is mounted on the mandrel a neck can be rolled, between the beading means and the mandrel, on the body immediately behind the said flange and merging therewith.

Claim 9

Apparatus according to claim 6 wherein the profile of the body-engaging portion of the beading means is a continuous curve.

Claim 10

The apparatus of claim 6 wherein there are stop means for limiting movement of said annular surface axially towards said beading means to a distance slightly greater than the thickness of the flange.

Claim 11

The apparatus of claim 8 wherein there is a carrier for said annular surface, and said stop means abutting portions of said carrier and said mandrel.

Claim 12

Apparatus according to claim 6 wherein said beading means are in the form of a fixed cam-like member.

Claim 13

The method of claim 1 wherein said can body has a lapped seam with a circumferentially facing exposed edge, and wherein said neck forming is in the direction wherein the exposed edge trails.