Rose-bottom or block-bottom valve bag
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United States of America Patent
Stats
-
Jul 26, 1988
Grant Date -
N/A
app pub date -
Feb 18, 1987
filing date -
Oct 24, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bag of foldable material has an end closure closing off one end of the bag and a filling valve tube device extends into the end closure at a corner of the bag, the filling valve tube device has an inner end disposed within the interior of the bag and has an inner layer which is convertable from a normally inactive adhesive state to a state capable of sealing off the filling valve tube device. A shut-off lip device of flexible material is disposed within the end closure and projects into the interior of the bag beyond the interior end of the filling valve tube device, the shut-off lip device being constructed to be responsive to the pressure of the filling material introduced into the interior of the bag to close off the interior opening of the filling valve tube device.
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