The housing including the sections 4a, 4b has a window which enables the output element of the driving device 5 (such output element can include a friction wheel) to engage the outermost convolution of the film on the core of the confined reel 3 and/or one or both flanges of the reel in order to rotate the reel 3 in a counterclockwise direction (as seen in FIG. 1) whereby the leader of the film st