Method and apparatus for forming, filling and sealing bags made from a continuous plastic sheet
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United States of America Patent
Stats
-
Jun 30, 1987
Grant Date -
N/A
app pub date -
Oct 20, 1986
filing date -
Oct 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plastic bag is formed, filled, sealed and separated from a continuous web of longitudinally folded plastic material. The web passes downwardly between complementary L-shaped heat sealing jaws that reciprocate and cooperate to provide seams which form a pocket that is closed after it has been filled from above and indexed downwardly. The top seam of one pocket is formed simultaneously with the bottom seam of an adjacent pocket and a weakened line of juncture is provided therebetween. Grippers carried on the heat sealing jaws engage opposite sides of the plastic web above the location of the top seam of the filled pocket and cooperate with a separator that tensions the web along the weakened line to rupture the filled pocket from the web while the web is still in a thermally weakened condition.
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