Hydraulic web roll shaft
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United States of America Patent
Stats
-
Oct 9, 2001
Grant Date -
N/A
app pub date -
Dec 7, 1999
filing date -
Dec 7, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A web material roll rotatable retention assembly, comprising a shaft adapted to be inserted into a web material roll core and having a hydrogel filled chamber is disclosed. A hydrogel pressure applying assembly controllably applies pressure to the hydrogel and an outward pressure applying assembly pushes pressure applying members outwardly in response to the pressure of the hydrogel.
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