Apparatus for flanging containers

Details Apparatus for flanging containers Apparatus for flanging containers

B - Operations, Transporting

21

D

B21D 19/00 (2006.01) B21D 19/04 (2006.01) B21D 51/26 (2006.01)

Patent

CA 2100803

A flanging head assembly having a cluster of freely rotatable spin flanging rollers includes a stop ring against which the flange hits during the final flange forming stages to limit the flange to a specific diameter. To prevent the flange from entering the crack formed between the rotating roller and the stationary stop ring, there is provided a step spacing the stop ring surface from the roller forming surface. In this manner, as the terminal edge of the flange slides around the flanging roller during final forming, it will pass over the crack and across the step to lodge in a corner formed between the step and stop ring surface. In a preferred embodiment, the step is a conical surface extending from the stop ring surface in a direction away from the can bottom. This conical surface extends radially inwardly a sufficient distance to contact unsupported flange portions between the flanging rollers to limit the degree of elastic sagging of these portions.

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