Packaging machine with improved film-transporting device
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United States of America Patent
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Aug 24, 1993
Grant Date -
N/A
app pub date -
Jul 7, 1992
filing date -
Jul 12, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A form-fill-seal type packaging machine pulls an elongated film out of a film roll, directs it to a former to roll the film into a cylindrical form and produces bags by longitudinally sealing the overlapping side edges of the film and transversely sealing the tubular film at top and bottom positions. A roller-like film-guiding piece normally disposed adjacent to the former is on a slidable base plate so as to be retractable away from the former for the convenience of the operator when the film is initially set or when the former is replaced by another one. The slidable plate can be automatically stopped at its normal position adjacent to the former by detecting the extension of the former by a sensor. A device for straightening the film undergoing a zigzag motion is also supported by this slidable plate and hence can be retracted away from the former.
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