| 摘要 |
A film F is drawn out from a film roll R and continuously transferred, and margins of the film F are overlapped and is sealed to produce a vertical seal F1 by paired vertical seal rollers 8 to shape the film F into a tubular form. A product content is filled into a tube-shaped portion of the film F, and the tube-shaped portion of the film F is sealed to produce a lateral seal F2 by paired lateral seal rollers 9 and 10 to thereby form a bag. At least one lateral seal roller 91 of the lateral seal rollers 9 is movably provided and there are provided a pusher device 14 for pushing at least one seal roller 91 against the other seal roller 92, a joint detector 16 provided upstream in a film transfer direction of the paired lateral seal rollers 9 for detecting a joint J in the film F, and a controller 17 which reduces or eliminates a pushing force exerted by the pusher device 14 when a specified time period has elapsed after detection of the joint J in the film F by the joint detector 16. <IMAGE> |
