| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bag making machine which is free from dislocation of a film during conveyance in a film flow direction or a dimension accuracy error of a bag which causes rapid film conveyance and the stopping of the conveyance. <P>SOLUTION: A heat-sealing device of a rotary bag making machine includes a heat-sealing roll 5 which repeatedly forms heat-sealing parts 1a with a predetermined pitch by bringing a heating part 4 into contact with a bag material per rotation, a pattern position detector 6 for detecting the pattern position of the bag material, and a control part 7 for rotating the heat-sealing roll at a low speed and rotating a feed roller at the low speed by synchronizing with it when forming the heat-sealing part 1a at the bag material based on the signal from the pattern position detector, and for rotating the heat-sealing roll at a high speed and rotating the feed roller at the high speed till a next heat-sealing part is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
