Plastic bag making apparatus

摘要

Abstract In an apparatus for successively making plastic bags, a laser beam irradiator 5 irradiates laser beam 6 onto webs of panel material 2 and a body of zipper material 3 5 to heat and melt the webs of panel material 2 and the body of zipper material 3 with the laser beam 6. The webs of panel material 2 and the body of zipper material 3 are fed intermittently at a speed V predetermined to be changed by time T. The irradiator 5 is controlled on a feedforward 10 control basis for the laser beam 6 to be regulated in amount Q, the amount Q being calculated from the speed V predetermined, to obtain a calculated value of amount Q. The laser beam 6 is regulated in accordance with the calculated value to heat and melt the webs of panel 15 material 2 and the body of zipper material 3 uniformly irrespective of the speed V being changed. 6040929_1 (GHMatters) P98888.AU BELAG 0