Package making – Methods – Enclosing contents within progressively formed web means
Patent
1987-06-22
1988-10-25
Culver, Horace M.
Package making
Methods
Enclosing contents within progressively formed web means
53455, 53552, 53562, 53373, B65B 908, B65B 4304
Patent
active
047794003
ABSTRACT:
A plastic bag is formed, filled, sealed and separated from continuous webs of plastic material. The webs pass downwardly between complementary U-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 webs above the location of the top seam of the filled pocket and cooperate with a separator that tensions the webs along the weakened line to rupture the filled pocket from the webs while the webs are still in a thermally weakened condition.
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Hoskinson Marlin J.
Lorincz Eugene
Culver Horace M.
Moore Push-Pin Company
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