Form-fill-seal type packaging machine.

摘要

A form-fill-seal type packaging machine pulls an elongated film (4) out of a film roll, directs it to a former (6) 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 (32) normally disposed adjacent to the former (6) is on a slidable base plate (19) 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 (19) can be automatically stopped at its normal position adjacent to the former by detecting the extension of the former by a sensor (41). A device (31) for straightening the film undergoing a zigzag motion is also supported by this slidable plate and hence can be retracted away from the former.