27 u2033 respectively link 31 supporting frame 30 is thereby swung to the right since the adjustment of deflecting rollers 12 21 and 27 takes place in essentially equal amounts transport belts 10 and 11 remain tensioned by the aid of the movement of frame 30 along with link 31 the length of transport belts 10 and 11 between take up site a and discharge site b can be varied thus it is possible to temporarily change the speed of the web discharge at discharge site b with respect to the web take up speed at take up site a this change is required for cross lapper 1 since the speed at which discharge site b i e lower end 3 l of laying arm 3 moves over output conveyor 60 cannot be constant since in the area of the movement reversal points of arm 3 its speed must be reduced by braking to zero and then accelerated in the opposite direction after the reversal of the movement if during these braking and acceleration phases arm 3 continued to discharge the web material at the constant speed of transport belts 10 and 11 web upsetting and web thickening would result in marginal portions of the fleece web laid by cross lapper 1 and such variations must be prevented thus it is necessary to vary the speed at which the web material is discharged from transport belts 10 and 11 adapting to the speed of laying arm 3 at which this arm moves across output conveyor 60 this variation of the discharge speed of the web material from the gap between deflecting rollers 16 and 17 at discharge site b can be managed by suitable control of the speed of drive rollers 13.