| 摘要 |
PURPOSE:To provide a nipping opening/closing mechanism, which can be made smaller by limiting constituent members to as little as possible, and the price of which can be reduced, and in addition, which can easily realize the opening/ closing of the nipping of the welding rollers and discharging rollers by complicated timings. CONSTITUTION:The automatic sealing machine is equipped with a nipping opening/closing means for welding rollers 20, a nipping opening/closing means for discharging rollers 21, and a control means. The control means makes the discharging rollers perform 1 cycle of the nipping-opening and nipping-closing, corresponding with the entering of the leading end of a film between the discharging rollers and the discharging after that, while making the welding rollers perform 2 cycles of the nipping-opening and nipping-closing, respectively corresponding with the entering of the leading end of the film between the welding rollers, heat-sealing, cutting by fusion and heat-sealing of the rear end of the film. |
