ascend and descend it is to be noted that either the arm 31 could descend first and subsequently the arm 34 could ascend to cut the film 11 or the arms 31 and 34 could be actuated simultaneously fig6 shows still another preferred embodiment of the present invention differences between this preferred embodiment and the above described embodiment illustrated in fig5 exist in that the single arm 31 in fig5 is modified into two arms 36 and 38 a guide roll 37 is mounted at the tip end of the arm 36 electrostatic charging means 20 is mounted at the tip end of the other arm 38 and a press roll 39 is pivotably supported from the same arm 38 close to the electrostatic charging means on its inner side with regard to the remainder of the apparatus the construction is identical to the preferred embodiment shown in fig5 describing now the operation of the modified embodiment shown in fig6 after the arm 34 ascends to the position shown in fig6 the arm 38 descends to press the roll 39 against the core 13 at the same time the arm 36 descends to bring the guide roll 37 into contact with the film 11 and while a tension is being applied to the film 11 by.