to include at the centre an angle of about 120 u00b0 the slots are staggered relative to one another by about 60 u00b0 and are spaced 10 to 15 millimeters apart along the entire length of the mandrel 1 except at the two ends 3 and 4 which are each free of slots for a distance of about 30 mm slots 5 in the wall of the mandrel at its ends are for centering the spool in order to ensure ease of subsequent unwinding while the reel of textile is shown at 6 this being formed by individual turns 7 of thread at 8 and 9 are straight ends of the spool which are flush with each end of the mandrel 1 and are perpendicular to the mandrel axis in a particular embodiment the spools are formed by winding a 4 720 tex roving glass thread which is without twist and is formed by continuous individual 13 5 u03bc filaments origin owens corning fibreglass ocf sizing type 891 with a crossing of 3 37 a laying index of 0 55 and a density of 1 35 as already stated the travel of this spool is 270 millimeters each individual spool weighs about 17 kilograms and has a proportion of resin of 25 by weight 1 200 tex glass roving origin ocf 17 5 u03bc filaments crossing 2 54 laying index 0 55 density of the reel before treatment 1 75 proportion of resin deposited obdma 17 2 400 tex glass roving origin ocf 13 5 u03bc filaments crossing 2 55 laying index 0.