of cams 20 and 21 is chosen to compensate for the difference in length of the circumference of the outer layer of wheel 9 between two positions of rotation of wheel 9 detected by sensors 17 and 18 furthermore cam 22 contributes to a more positive introduction of the insert at the level of roller 2 the introduction of insert 1 is extended beyond the point where insert 1 arrives tangent to the wheel by a length corresponding to a given angle of rotation of wheel 9 so that all the leaders of the successive inserts are aligned along the same radius ob o of wheel 9 see fig8 a and 9 compensation of this length as a function of the diameter of the outer layer is provided by the linear cam 22 with this arrangement by disposing roller 2 a little beyond the point where insert 1 arrives tangent to the wheel insert 1 is pressed against the wheel at the beginning of winding thereof as will be explained hereafter in greater detail this allows the winding of the insert to be started without slipping in fig2 the fixed clip 19 is open and the mobile clip 8 is closed the presser roller 2 is raised and the drive for the main slide 3 by motor 4 and the screw nut system 5 is interrupted a mark located on wheel 9 is indexed at a position detected by a sensor 17 the primary slide 6 is then translated see fig3 towards its forward stop 21 and the insert 1 is advanced by the mobile clip 8 over a distance equal to the distance of travel of the primary slide 6 since the angle of slope of cams 20.