METHOD AND APPARATUS FOR TOP SEALING WOVEN BAGS
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United States of America Patent
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N/A
Issued Date -
Sep 13, 2012
app pub date -
Aug 22, 2011
filing date -
Mar 7, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A system is provided for filling and sealing bags and is especially useful with woven polybags formed of thermoplastic material. The system includes a plastic welder having a folding device for folding over a portion of the filled bag which is sealed by a welding tip and pinch rollers. The welding tip may be moved between welding and non-welding positions based on a bag sensor or timer. A contact prevention member prevents the welding tip from contacting and damaging a coating on a portion of the bag. The system is configured to form a substantial seam without using hot melt adhesive.
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