| 摘要 |
PURPOSE:To provide a product trapping-preventing method for a heater for lateral sealing in a lateral bag/making/filling/packaging method, which can prevent the front side or rear side of an object to be packaged from being laterally sealed and cut, when an opaque packaging film is used. CONSTITUTION:An object to be packaged detecting sensor 6 is provided between film ends (f) at a location between a film transferring roll 2 and a heater 3 for vertical sealing, and the front end of an object to be packaged W is detected. From when a lateral sealing is performed on the object to be packaged W, a pulse which is output from a pulse generating means 7 is counted, and the counting of the pulse is stopped based on a sensor signal. When the counted pulses is smaller than a small threshold value, the front side of the object to be packaged W is not laterally sealed. Also, when the counted pulses is larger than a large threshold value, the rear side of the object to be packaged W is not laterally sealed. When the next lateral sealing is performed without a detection of an object to e package W by the object to be packaged detecting sensor 6 after a lateral sealing has been performed, the pulse is newly counted. |
