Package making – Closing packages and filled receptacles – By means adapted to engage outturned seam of package cover
Patent
1976-12-29
1978-02-07
Simpson, Othell M.
Package making
Closing packages and filled receptacles
By means adapted to engage outturned seam of package cover
B65B 706, B65B 5114
Patent
active
040719995
ABSTRACT:
A machine for closing and sealing a plastic bag filled with material, such as, for instance, peat moss. The machine includes a carriage which moves around the top open end of the filled bag, hook-shaped fingers carried by the carriage, pivot down into the open mouth of the bag to catch the four corners of the same, oppositely disposed pusher fingers engage opposite walls of the bag, each intermediate a set of two hooking fingers to tension the bag wall horizontally. Then the hooking fingers gradually move down at an angle to converge in pairs at the two opposite sides of the bag mouth and, simultaneously, the pusher fingers continue to push intermediate wall portions inwardly to, all the time, maintain the bag mouth wall taut and to form opposite folds in the mouth, thereby closing the mouth. The hooking and pushing fingers are then moved in an out-of-the-way position and, immediately thereafter, a heat sealer, provided with a fixed and a pivoted jaw, clamps the closed mouth and heat-seals the same and, simultaneously, cuts off the surplus wall material above the seal. Then the machine retracts to clear the sealed bag which can be removed and replaced by another filled bag to be closed and sealed. The entire closing and sealing operation is effected while the bag is in upright position. Thus peat moss, or other material, does not become trapped between the mouth walls during the closing and sealing operation and a completely air-tight and liquid-tight seal is obtained.
REFERENCES:
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patent: 2243805 (1941-05-01), Knapp
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patent: 3115736 (1963-12-01), Peterson
patent: 3220161 (1965-11-01), Lohse et al.
patent: 3470795 (1969-10-01), Davis, Jr.
Culver Horace M.
Simpson Othell M.
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