Stop ring in apparatus for flanging containers
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United States of America Patent
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-
Oct 28, 1997
Grant Date -
N/A
app pub date -
Aug 22, 1996
filing date -
Aug 22, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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 a preferred embodiment, the step is axially forwardly spaced from the trailing end of the flange forming surfaces and intersects a conical surface extending radially inwardly beneath the flange forming surface. This conical surface contacts unsupported flange portions between the flanging rollers to limit the degree of elastic sagging of these portions. The intersection between this conical surface with the step also supports the sagging flange portions without inducing permanent flange deformation.
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