Patent ID: 7526937

Claim:
A can bottom forming assembly for forming the bottom of a can body and for attachment to a body maker having a punch, said bottom forming assembly comprising: a) a housing assembly having an outer housing, a cylinder housing and a cover chamber connected to said cylinder housing, said cylinder housing being constructed and arranged for sliding engagement within said outer housing, said cylinder housing having opposing axially aligned cylinders separated by a circular wall with an annular peripheral ledge extending outward from said axially aligned cylinders; b) a clamp ring retainer assembly having biasing means to float a clamp ring, wherein said clamp ring retainer assembly is constructed and arranged to be partially positioned within said outer housing; c) a clamp ring and a domer die plug for contact with the can body; d) a piston assembly in communication with said domer die plug; e) an annular compressible spring member constructed and arranged for placement on said cylinder housing to absorb movement of said cylinder housing with respect to said outer housing; and f) means to attach the can bottom forming assembly to a bodymaker assembly, said means to attach including a mounting flange, at least one tension bolt and at least one spacer member and wherein a spring plate is spaced from said peripheral ledge and wherein said tension bolt extends through said spring plate, said annular spring member, said spacer and said outer housing.