number 5 has two driver means 5a and 5b acting on the outer sides of the belt sections 18a and 19a with the piece 1 and carrying the latter with them in the direction of arrow v this motion is introduced by means of a drive s having a crank shaft gear in order to enable the relative motion of neighbouring tools the belts have a greater elastic deformation capacity being sheared in parallel to the 34 plane of the piece 34 than in case of being extended elastic deformation capacity may be especially great for shearing transversely to the direction of transport within the tool 5 driver means 5a and 5b are arranged movable transversely to the 34 plane of the piece 34 by means of guides 9 in relation to each other and they are pressed together and against the belt sections 18a 19a by pressure springs 20 the pressure has to be adjusted so as not to impede the transport motion too much it is possible to use a periodically variable pressure acting on the tools then the transportation being concentrated more or less in the time intervals of reduced pressure and friction between the tools and the belts fig3 shows such periodically variable pressurizing device for the tool 5 and its driver means in dependence on the oscillating tool motion pressurizing means 21 are acting through rollers 12 on wedge shaped guides or cams 11 at the driver means 5a 5b oppositely.